ddf5152bb8
Save link key to settings_subsys, no need to re-pair after restart. Overwrite old pairing records with aging counts. Signed-off-by: ZhongYao Luo <LuoZhongYao@gmail.com>
127 lines
3.8 KiB
C
127 lines
3.8 KiB
C
/* keys.h - Bluetooth key handling */
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/*
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* Copyright (c) 2015-2016 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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enum {
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BT_KEYS_SLAVE_LTK = BIT(0),
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BT_KEYS_IRK = BIT(1),
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BT_KEYS_LTK = BIT(2),
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BT_KEYS_LOCAL_CSRK = BIT(3),
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BT_KEYS_REMOTE_CSRK = BIT(4),
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BT_KEYS_LTK_P256 = BIT(5),
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BT_KEYS_ALL = (BT_KEYS_SLAVE_LTK | BT_KEYS_IRK | \
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BT_KEYS_LTK | BT_KEYS_LOCAL_CSRK | \
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BT_KEYS_REMOTE_CSRK | BT_KEYS_LTK_P256),
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};
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enum {
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BT_KEYS_ID_PENDING_ADD = BIT(0),
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BT_KEYS_ID_PENDING_DEL = BIT(1),
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BT_KEYS_ID_ADDED = BIT(2),
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};
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enum {
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BT_KEYS_AUTHENTICATED = BIT(0),
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BT_KEYS_DEBUG = BIT(1),
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/* Bit 2 and 3 might accidentally exist in old stored keys */
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BT_KEYS_SC = BIT(4),
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};
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struct bt_ltk {
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uint8_t rand[8];
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uint8_t ediv[2];
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uint8_t val[16];
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};
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struct bt_irk {
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uint8_t val[16];
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bt_addr_t rpa;
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};
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struct bt_csrk {
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uint8_t val[16];
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uint32_t cnt;
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};
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struct bt_keys {
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uint8_t id;
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bt_addr_le_t addr;
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uint8_t state;
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uint8_t storage_start[0] __aligned(sizeof(void *));
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uint8_t enc_size;
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uint8_t flags;
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uint16_t keys;
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struct bt_ltk ltk;
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struct bt_irk irk;
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#if defined(CONFIG_BT_SIGNING)
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struct bt_csrk local_csrk;
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struct bt_csrk remote_csrk;
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#endif /* BT_SIGNING */
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#if !defined(CONFIG_BT_SMP_SC_PAIR_ONLY)
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struct bt_ltk slave_ltk;
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#endif /* CONFIG_BT_SMP_SC_PAIR_ONLY */
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#if (defined(CONFIG_BT_KEYS_OVERWRITE_OLDEST))
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uint32_t aging_counter;
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#endif /* CONFIG_BT_KEYS_OVERWRITE_OLDEST */
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};
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#define BT_KEYS_STORAGE_LEN (sizeof(struct bt_keys) - \
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offsetof(struct bt_keys, storage_start))
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void bt_keys_foreach(int type, void (*func)(struct bt_keys *keys, void *data),
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void *data);
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struct bt_keys *bt_keys_get_addr(uint8_t id, const bt_addr_le_t *addr);
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struct bt_keys *bt_keys_get_type(int type, uint8_t id, const bt_addr_le_t *addr);
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struct bt_keys *bt_keys_find(int type, uint8_t id, const bt_addr_le_t *addr);
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struct bt_keys *bt_keys_find_irk(uint8_t id, const bt_addr_le_t *addr);
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struct bt_keys *bt_keys_find_addr(uint8_t id, const bt_addr_le_t *addr);
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void bt_keys_add_type(struct bt_keys *keys, int type);
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void bt_keys_clear(struct bt_keys *keys);
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#if defined(CONFIG_BT_SETTINGS)
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int bt_keys_store(struct bt_keys *keys);
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#else
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static inline int bt_keys_store(struct bt_keys *keys)
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{
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return 0;
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}
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#endif
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enum {
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BT_LINK_KEY_AUTHENTICATED = BIT(0),
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BT_LINK_KEY_DEBUG = BIT(1),
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BT_LINK_KEY_SC = BIT(2),
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};
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struct bt_keys_link_key {
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bt_addr_t addr;
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uint8_t storage_start[0] __aligned(sizeof(void *));
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uint8_t flags;
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uint8_t val[16];
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#if (defined(CONFIG_BT_KEYS_OVERWRITE_OLDEST))
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uint32_t aging_counter;
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#endif /* CONFIG_BT_KEYS_OVERWRITE_OLDEST */
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};
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#define BT_KEYS_LINK_KEY_STORAGE_LEN (sizeof(struct bt_keys_link_key) - \
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offsetof(struct bt_keys_link_key, storage_start))
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struct bt_keys_link_key *bt_keys_get_link_key(const bt_addr_t *addr);
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struct bt_keys_link_key *bt_keys_find_link_key(const bt_addr_t *addr);
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void bt_keys_link_key_clear(struct bt_keys_link_key *link_key);
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void bt_keys_link_key_clear_addr(const bt_addr_t *addr);
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void bt_keys_link_key_store(struct bt_keys_link_key *link_key);
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/* This function is used to signal that the key has been used for paring */
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/* It updates the aging counter and saves it to flash if configuration option */
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/* BT_KEYS_SAVE_AGING_COUNTER_ON_PAIRING is enabled */
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void bt_keys_update_usage(uint8_t id, const bt_addr_le_t *addr);
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void bt_keys_link_key_update_usage(const bt_addr_t *addr);
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