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// SPDX-License-Identifier: LGPL-2.1-or-later
/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2011-2014 Intel Corporation
* Copyright (C) 2002-2010 Marcel Holtmann <marcel@holtmann.org>
*
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <string.h>
#include "src/shared/util.h"
#include "src/shared/queue.h"
#include "src/shared/crypto.h"
#include "keys.h"
static const uint8_t empty_key[16] = { 0x00, };
static const uint8_t empty_addr[6] = { 0x00, };
static struct bt_crypto *crypto;
struct irk_data {
uint8_t key[16];
uint8_t addr[6];
uint8_t addr_type;
};
static struct queue *irk_list;
void keys_setup(void)
{
crypto = bt_crypto_new();
irk_list = queue_new();
}
void keys_cleanup(void)
{
bt_crypto_unref(crypto);
queue_destroy(irk_list, free);
}
void keys_update_identity_key(const uint8_t key[16])
{
struct irk_data *irk;
irk = queue_peek_tail(irk_list);
if (irk && !memcmp(irk->key, empty_key, 16)) {
memcpy(irk->key, key, 16);
return;
}
irk = new0(struct irk_data, 1);
if (irk) {
memcpy(irk->key, key, 16);
if (!queue_push_tail(irk_list, irk))
free(irk);
}
}
void keys_update_identity_addr(const uint8_t addr[6], uint8_t addr_type)
{
struct irk_data *irk;
irk = queue_peek_tail(irk_list);
if (irk && !memcmp(irk->addr, empty_addr, 6)) {
memcpy(irk->addr, addr, 6);
irk->addr_type = addr_type;
return;
}
irk = new0(struct irk_data, 1);
if (irk) {
memcpy(irk->addr, addr, 6);
irk->addr_type = addr_type;
if (!queue_push_tail(irk_list, irk))
free(irk);
}
}
static bool match_resolve_irk(const void *data, const void *match_data)
{
const struct irk_data *irk = data;
const uint8_t *addr = match_data;
uint8_t local_hash[3];
bt_crypto_ah(crypto, irk->key, addr + 3, local_hash);
return !memcmp(addr, local_hash, 3);
}
bool keys_resolve_identity(const uint8_t addr[6], uint8_t ident[6],
uint8_t *ident_type)
{
struct irk_data *irk;
irk = queue_find(irk_list, match_resolve_irk, addr);
if (irk) {
memcpy(ident, irk->addr, 6);
*ident_type = irk->addr_type;
return true;
}
return false;
}
static bool match_key(const void *data, const void *match_data)
{
const struct irk_data *irk = data;
const uint8_t *key = match_data;
return !memcmp(irk->key, key, 16);
}
bool keys_add_identity(const uint8_t addr[6], uint8_t addr_type,
const uint8_t key[16])
{
struct irk_data *irk;
irk = queue_find(irk_list, match_key, key);
if (!irk) {
irk = new0(struct irk_data, 1);
memcpy(irk->key, key, 16);
queue_push_tail(irk_list, irk);
}
memcpy(irk->addr, addr, 6);
irk->addr_type = addr_type;
return true;
}
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