mirror of
https://git.kernel.org/pub/scm/bluetooth/bluez.git
synced 2024-11-16 00:34:39 +08:00
128 lines
2.8 KiB
C
128 lines
2.8 KiB
C
/*
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*
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* BlueZ - Bluetooth protocol stack for Linux
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*
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* Copyright (C) 2011-2014 Intel Corporation
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* Copyright (C) 2002-2010 Marcel Holtmann <marcel@holtmann.org>
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*
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <string.h>
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#include "src/shared/util.h"
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#include "src/shared/queue.h"
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#include "src/shared/crypto.h"
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#include "keys.h"
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static const uint8_t empty_key[16] = { 0x00, };
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static const uint8_t empty_addr[6] = { 0x00, };
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static struct bt_crypto *crypto;
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struct irk_data {
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uint8_t key[16];
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uint8_t addr[6];
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uint8_t addr_type;
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};
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static struct queue *irk_list;
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void keys_setup(void)
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{
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crypto = bt_crypto_new();
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irk_list = queue_new();
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}
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void keys_cleanup(void)
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{
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bt_crypto_unref(crypto);
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queue_destroy(irk_list, free);
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}
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void keys_update_identity_key(const uint8_t key[16])
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{
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struct irk_data *irk;
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irk = queue_peek_tail(irk_list);
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if (irk && !memcmp(irk->key, empty_key, 16)) {
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memcpy(irk->key, key, 16);
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return;
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}
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irk = new0(struct irk_data, 1);
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if (irk) {
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memcpy(irk->key, key, 16);
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if (!queue_push_tail(irk_list, irk))
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free(irk);
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}
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}
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void keys_update_identity_addr(const uint8_t addr[6], uint8_t addr_type)
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{
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struct irk_data *irk;
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irk = queue_peek_tail(irk_list);
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if (irk && !memcmp(irk->addr, empty_addr, 6)) {
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memcpy(irk->addr, addr, 6);
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irk->addr_type = addr_type;
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return;
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}
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irk = new0(struct irk_data, 1);
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if (irk) {
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memcpy(irk->addr, addr, 6);
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irk->addr_type = addr_type;
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if (!queue_push_tail(irk_list, irk))
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free(irk);
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}
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}
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static bool match_resolve_irk(const void *data, const void *match_data)
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{
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const struct irk_data *irk = data;
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const uint8_t *addr = match_data;
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uint8_t local_hash[3];
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bt_crypto_ah(crypto, irk->key, addr + 3, local_hash);
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return !memcmp(addr, local_hash, 3);
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}
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bool keys_resolve_identity(const uint8_t addr[6], uint8_t ident[6],
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uint8_t *ident_type)
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{
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struct irk_data *irk;
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irk = queue_find(irk_list, match_resolve_irk, addr);
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if (irk) {
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memcpy(ident, irk->addr, 6);
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*ident_type = irk->addr_type;
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return true;
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}
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return false;
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}
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