/******************************************************************************
*
* Copyright (C) 1999-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This file contains functions for BLE device control utilities, and LE
* security functions.
*
******************************************************************************/
#define LOG_TAG "bt_btm_ble"
#include "bt_target.h"
#include <base/bind.h>
#include <string.h>
#include "bt_types.h"
#include "bt_utils.h"
#include "btm_ble_api.h"
#include "btm_int.h"
#include "btu.h"
#include "device/include/controller.h"
#include "gap_api.h"
#include "gatt_api.h"
#include "hcimsgs.h"
#include "l2c_int.h"
#include "osi/include/log.h"
#include "osi/include/osi.h"
#include "smp_api.h"
extern bool aes_cipher_msg_auth_code(BT_OCTET16 key, uint8_t* input,
uint16_t length, uint16_t tlen,
uint8_t* p_signature);
/******************************************************************************/
/* External Function to be called by other modules */
/******************************************************************************/
/********************************************************
*
* Function BTM_SecAddBleDevice
*
* Description Add/modify device. This function will be normally called
* during host startup to restore all required information
* for a LE device stored in the NVRAM.
*
* Parameters: bd_addr - BD address of the peer
* bd_name - Name of the peer device. NULL if unknown.
* dev_type - Remote device's device type.
* addr_type - LE device address type.
*
* Returns true if added OK, else false
*
******************************************************************************/
bool BTM_SecAddBleDevice(const BD_ADDR bd_addr, BD_NAME bd_name,
tBT_DEVICE_TYPE dev_type, tBLE_ADDR_TYPE addr_type) {
BTM_TRACE_DEBUG("%s: dev_type=0x%x", __func__, dev_type);
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
if (!p_dev_rec) {
p_dev_rec = btm_sec_allocate_dev_rec();
memcpy(p_dev_rec->bd_addr, bd_addr, BD_ADDR_LEN);
p_dev_rec->hci_handle = BTM_GetHCIConnHandle(bd_addr, BT_TRANSPORT_BR_EDR);
p_dev_rec->ble_hci_handle = BTM_GetHCIConnHandle(bd_addr, BT_TRANSPORT_LE);
/* update conn params, use default value for background connection params */
p_dev_rec->conn_params.min_conn_int = BTM_BLE_CONN_PARAM_UNDEF;
p_dev_rec->conn_params.max_conn_int = BTM_BLE_CONN_PARAM_UNDEF;
p_dev_rec->conn_params.supervision_tout = BTM_BLE_CONN_PARAM_UNDEF;
p_dev_rec->conn_params.slave_latency = BTM_BLE_CONN_PARAM_UNDEF;
BTM_TRACE_DEBUG("%s: Device added, handle=0x%x ", __func__,
p_dev_rec->ble_hci_handle);
}
memset(p_dev_rec->sec_bd_name, 0, sizeof(tBTM_BD_NAME));
if (bd_name && bd_name[0]) {
p_dev_rec->sec_flags |= BTM_SEC_NAME_KNOWN;
strlcpy((char*)p_dev_rec->sec_bd_name, (char*)bd_name,
BTM_MAX_REM_BD_NAME_LEN);
}
p_dev_rec->device_type |= dev_type;
p_dev_rec->ble.ble_addr_type = addr_type;
memcpy(p_dev_rec->ble.pseudo_addr, bd_addr, BD_ADDR_LEN);
/* sync up with the Inq Data base*/
tBTM_INQ_INFO* p_info = BTM_InqDbRead(bd_addr);
if (p_info) {
p_info->results.ble_addr_type = p_dev_rec->ble.ble_addr_type;
p_info->results.device_type = p_dev_rec->device_type;
BTM_TRACE_DEBUG("InqDb device_type =0x%x addr_type=0x%x",
p_info->results.device_type, p_info->results.ble_addr_type);
}
return true;
}
/*******************************************************************************
*
* Function BTM_SecAddBleKey
*
* Description Add/modify LE device information. This function will be
* normally called during host startup to restore all required
* information stored in the NVRAM.
*
* Parameters: bd_addr - BD address of the peer
* p_le_key - LE key values.
* key_type - LE SMP key type.
*
* Returns true if added OK, else false
*
******************************************************************************/
bool BTM_SecAddBleKey(BD_ADDR bd_addr, tBTM_LE_KEY_VALUE* p_le_key,
tBTM_LE_KEY_TYPE key_type) {
tBTM_SEC_DEV_REC* p_dev_rec;
BTM_TRACE_DEBUG("BTM_SecAddBleKey");
p_dev_rec = btm_find_dev(bd_addr);
if (!p_dev_rec || !p_le_key ||
(key_type != BTM_LE_KEY_PENC && key_type != BTM_LE_KEY_PID &&
key_type != BTM_LE_KEY_PCSRK && key_type != BTM_LE_KEY_LENC &&
key_type != BTM_LE_KEY_LCSRK && key_type != BTM_LE_KEY_LID)) {
BTM_TRACE_WARNING(
"BTM_SecAddBleKey() Wrong Type, or No Device record \
for bdaddr: %08x%04x, Type: %d",
(bd_addr[0] << 24) + (bd_addr[1] << 16) + (bd_addr[2] << 8) +
bd_addr[3],
(bd_addr[4] << 8) + bd_addr[5], key_type);
return (false);
}
BTM_TRACE_DEBUG(
"BTM_SecAddLeKey() BDA: %08x%04x, Type: 0x%02x",
(bd_addr[0] << 24) + (bd_addr[1] << 16) + (bd_addr[2] << 8) + bd_addr[3],
(bd_addr[4] << 8) + bd_addr[5], key_type);
btm_sec_save_le_key(bd_addr, key_type, p_le_key, false);
#if (BLE_PRIVACY_SPT == TRUE)
if (key_type == BTM_LE_KEY_PID || key_type == BTM_LE_KEY_LID)
btm_ble_resolving_list_load_dev(p_dev_rec);
#endif
return (true);
}
/*******************************************************************************
*
* Function BTM_BleLoadLocalKeys
*
* Description Local local identity key, encryption root or sign counter.
*
* Parameters: key_type: type of key, can be BTM_BLE_KEY_TYPE_ID,
* BTM_BLE_KEY_TYPE_ER
* or BTM_BLE_KEY_TYPE_COUNTER.
* p_key: pointer to the key.
*
* Returns non2.
*
******************************************************************************/
void BTM_BleLoadLocalKeys(uint8_t key_type, tBTM_BLE_LOCAL_KEYS* p_key) {
tBTM_DEVCB* p_devcb = &btm_cb.devcb;
BTM_TRACE_DEBUG("%s", __func__);
if (p_key != NULL) {
switch (key_type) {
case BTM_BLE_KEY_TYPE_ID:
memcpy(&p_devcb->id_keys, &p_key->id_keys,
sizeof(tBTM_BLE_LOCAL_ID_KEYS));
break;
case BTM_BLE_KEY_TYPE_ER:
memcpy(p_devcb->ble_encryption_key_value, p_key->er,
sizeof(BT_OCTET16));
break;
default:
BTM_TRACE_ERROR("unknow local key type: %d", key_type);
break;
}
}
}
/*******************************************************************************
*
* Function BTM_GetDeviceEncRoot
*
* Description This function is called to read the local device encryption
* root.
*
* Returns void
* the local device ER is copied into ble_encr_key_value
*
******************************************************************************/
void BTM_GetDeviceEncRoot(BT_OCTET16 ble_encr_key_value) {
BTM_TRACE_DEBUG("%s", __func__);
memcpy(ble_encr_key_value, btm_cb.devcb.ble_encryption_key_value,
BT_OCTET16_LEN);
}
/*******************************************************************************
*
* Function BTM_GetDeviceIDRoot
*
* Description This function is called to read the local device identity
* root.
*
* Returns void
* the local device IR is copied into irk
*
******************************************************************************/
void BTM_GetDeviceIDRoot(BT_OCTET16 irk) {
BTM_TRACE_DEBUG("BTM_GetDeviceIDRoot ");
memcpy(irk, btm_cb.devcb.id_keys.irk, BT_OCTET16_LEN);
}
/*******************************************************************************
*
* Function BTM_GetDeviceDHK
*
* Description This function is called to read the local device DHK.
*
* Returns void
* the local device DHK is copied into dhk
*
******************************************************************************/
void BTM_GetDeviceDHK(BT_OCTET16 dhk) {
BTM_TRACE_DEBUG("BTM_GetDeviceDHK");
memcpy(dhk, btm_cb.devcb.id_keys.dhk, BT_OCTET16_LEN);
}
/*******************************************************************************
*
* Function BTM_ReadConnectionAddr
*
* Description This function is called to get the local device address
* information.
*
* Returns void
*
******************************************************************************/
void BTM_ReadConnectionAddr(BD_ADDR remote_bda, BD_ADDR local_conn_addr,
tBLE_ADDR_TYPE* p_addr_type) {
tACL_CONN* p_acl = btm_bda_to_acl(remote_bda, BT_TRANSPORT_LE);
if (p_acl == NULL) {
BTM_TRACE_ERROR("No connection exist!");
return;
}
memcpy(local_conn_addr, p_acl->conn_addr, BD_ADDR_LEN);
*p_addr_type = p_acl->conn_addr_type;
BTM_TRACE_DEBUG("BTM_ReadConnectionAddr address type: %d addr: 0x%02x",
p_acl->conn_addr_type, p_acl->conn_addr[0]);
}
/*******************************************************************************
*
* Function BTM_IsBleConnection
*
* Description This function is called to check if the connection handle
* for an LE link
*
* Returns true if connection is LE link, otherwise false.
*
******************************************************************************/
bool BTM_IsBleConnection(uint16_t conn_handle) {
uint8_t xx;
tACL_CONN* p;
BTM_TRACE_API("BTM_IsBleConnection: conn_handle: %d", conn_handle);
xx = btm_handle_to_acl_index(conn_handle);
if (xx >= MAX_L2CAP_LINKS) return false;
p = &btm_cb.acl_db[xx];
return (p->transport == BT_TRANSPORT_LE);
}
/*******************************************************************************
*
* Function BTM_ReadRemoteConnectionAddr
*
* Description This function is read the remote device address currently used
*
* Parameters pseudo_addr: pseudo random address available
* conn_addr:connection address used
* p_addr_type : BD Address type, Public or Random of the address
* used
*
* Returns bool, true if connection to remote device exists, else false
*
******************************************************************************/
bool BTM_ReadRemoteConnectionAddr(BD_ADDR pseudo_addr, BD_ADDR conn_addr,
tBLE_ADDR_TYPE* p_addr_type) {
bool st = true;
#if (BLE_PRIVACY_SPT == TRUE)
tACL_CONN* p = btm_bda_to_acl(pseudo_addr, BT_TRANSPORT_LE);
if (p == NULL) {
BTM_TRACE_ERROR(
"BTM_ReadRemoteConnectionAddr can not find connection"
" with matching address");
return false;
}
memcpy(conn_addr, p->active_remote_addr, BD_ADDR_LEN);
*p_addr_type = p->active_remote_addr_type;
#else
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(pseudo_addr);
memcpy(conn_addr, pseudo_addr, BD_ADDR_LEN);
if (p_dev_rec != NULL) {
*p_addr_type = p_dev_rec->ble.ble_addr_type;
}
#endif
return st;
}
/*******************************************************************************
*
* Function BTM_SecurityGrant
*
* Description This function is called to grant security process.
*
* Parameters bd_addr - peer device bd address.
* res - result of the operation BTM_SUCCESS if success.
* Otherwise, BTM_REPEATED_ATTEMPTS if too many
* attempts.
*
* Returns None
*
******************************************************************************/
void BTM_SecurityGrant(BD_ADDR bd_addr, uint8_t res) {
tSMP_STATUS res_smp =
(res == BTM_SUCCESS) ? SMP_SUCCESS : SMP_REPEATED_ATTEMPTS;
BTM_TRACE_DEBUG("BTM_SecurityGrant");
SMP_SecurityGrant(bd_addr, res_smp);
}
/*******************************************************************************
*
* Function BTM_BlePasskeyReply
*
* Description This function is called after Security Manager submitted
* passkey request to the application.
*
* Parameters: bd_addr - Address of the device for which passkey was
* requested
* res - result of the operation BTM_SUCCESS if success
* key_len - length in bytes of the Passkey
* p_passkey - pointer to array with the passkey
* trusted_mask - bitwise OR of trusted services (array of
* uint32_t)
*
******************************************************************************/
void BTM_BlePasskeyReply(BD_ADDR bd_addr, uint8_t res, uint32_t passkey) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
tSMP_STATUS res_smp =
(res == BTM_SUCCESS) ? SMP_SUCCESS : SMP_PASSKEY_ENTRY_FAIL;
if (p_dev_rec == NULL) {
BTM_TRACE_ERROR("Passkey reply to Unknown device");
return;
}
p_dev_rec->sec_flags |= BTM_SEC_LE_AUTHENTICATED;
BTM_TRACE_DEBUG("BTM_BlePasskeyReply");
SMP_PasskeyReply(bd_addr, res_smp, passkey);
}
/*******************************************************************************
*
* Function BTM_BleConfirmReply
*
* Description This function is called after Security Manager submitted
* numeric comparison request to the application.
*
* Parameters: bd_addr - Address of the device with which numeric
* comparison was requested
* res - comparison result BTM_SUCCESS if success
*
******************************************************************************/
void BTM_BleConfirmReply(BD_ADDR bd_addr, uint8_t res) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
tSMP_STATUS res_smp =
(res == BTM_SUCCESS) ? SMP_SUCCESS : SMP_PASSKEY_ENTRY_FAIL;
if (p_dev_rec == NULL) {
BTM_TRACE_ERROR("Passkey reply to Unknown device");
return;
}
p_dev_rec->sec_flags |= BTM_SEC_LE_AUTHENTICATED;
BTM_TRACE_DEBUG("%s", __func__);
SMP_ConfirmReply(bd_addr, res_smp);
}
/*******************************************************************************
*
* Function BTM_BleOobDataReply
*
* Description This function is called to provide the OOB data for
* SMP in response to BTM_LE_OOB_REQ_EVT
*
* Parameters: bd_addr - Address of the peer device
* res - result of the operation SMP_SUCCESS if success
* p_data - oob data, depending on transport and
* capabilities.
* Might be "Simple Pairing Randomizer", or
* "Security Manager TK Value".
*
******************************************************************************/
void BTM_BleOobDataReply(BD_ADDR bd_addr, uint8_t res, uint8_t len,
uint8_t* p_data) {
tSMP_STATUS res_smp = (res == BTM_SUCCESS) ? SMP_SUCCESS : SMP_OOB_FAIL;
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
BTM_TRACE_DEBUG("%s:", __func__);
if (p_dev_rec == NULL) {
BTM_TRACE_ERROR("%s: Unknown device", __func__);
return;
}
p_dev_rec->sec_flags |= BTM_SEC_LE_AUTHENTICATED;
SMP_OobDataReply(bd_addr, res_smp, len, p_data);
}
/*******************************************************************************
*
* Function BTM_BleSecureConnectionOobDataReply
*
* Description This function is called to provide the OOB data for
* SMP in response to BTM_LE_OOB_REQ_EVT when secure connection
* data is available
*
* Parameters: bd_addr - Address of the peer device
* p_c - pointer to Confirmation.
* p_r - pointer to Randomizer
*
******************************************************************************/
void BTM_BleSecureConnectionOobDataReply(BD_ADDR bd_addr, uint8_t* p_c,
uint8_t* p_r) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
BTM_TRACE_DEBUG("%s:", __func__);
if (p_dev_rec == NULL) {
BTM_TRACE_ERROR("%s: Unknown device", __func__);
return;
}
p_dev_rec->sec_flags |= BTM_SEC_LE_AUTHENTICATED;
tSMP_SC_OOB_DATA oob;
memset(&oob, 0, sizeof(tSMP_SC_OOB_DATA));
oob.peer_oob_data.present = true;
memcpy(&oob.peer_oob_data.randomizer, p_r, BT_OCTET16_LEN);
memcpy(&oob.peer_oob_data.commitment, p_c, BT_OCTET16_LEN);
oob.peer_oob_data.addr_rcvd_from.type = p_dev_rec->ble.ble_addr_type;
memcpy(&oob.peer_oob_data.addr_rcvd_from.bda, bd_addr, sizeof(BD_ADDR));
SMP_SecureConnectionOobDataReply((uint8_t*)&oob);
}
/******************************************************************************
*
* Function BTM_BleSetConnScanParams
*
* Description Set scan parameter used in BLE connection request
*
* Parameters: scan_interval: scan interval
* scan_window: scan window
*
* Returns void
*
******************************************************************************/
void BTM_BleSetConnScanParams(uint32_t scan_interval, uint32_t scan_window) {
tBTM_BLE_CB* p_ble_cb = &btm_cb.ble_ctr_cb;
bool new_param = false;
if (BTM_BLE_ISVALID_PARAM(scan_interval, BTM_BLE_SCAN_INT_MIN,
BTM_BLE_SCAN_INT_MAX) &&
BTM_BLE_ISVALID_PARAM(scan_window, BTM_BLE_SCAN_WIN_MIN,
BTM_BLE_SCAN_WIN_MAX)) {
if (p_ble_cb->scan_int != scan_interval) {
p_ble_cb->scan_int = scan_interval;
new_param = true;
}
if (p_ble_cb->scan_win != scan_window) {
p_ble_cb->scan_win = scan_window;
new_param = true;
}
if (new_param && p_ble_cb->conn_state == BLE_BG_CONN) {
btm_ble_suspend_bg_conn();
}
} else {
BTM_TRACE_ERROR("Illegal Connection Scan Parameters");
}
}
/********************************************************
*
* Function BTM_BleSetPrefConnParams
*
* Description Set a peripheral's preferred connection parameters
*
* Parameters: bd_addr - BD address of the peripheral
* scan_interval: scan interval
* scan_window: scan window
* min_conn_int - minimum preferred connection interval
* max_conn_int - maximum preferred connection interval
* slave_latency - preferred slave latency
* supervision_tout - preferred supervision timeout
*
* Returns void
*
******************************************************************************/
void BTM_BleSetPrefConnParams(BD_ADDR bd_addr, uint16_t min_conn_int,
uint16_t max_conn_int, uint16_t slave_latency,
uint16_t supervision_tout) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
BTM_TRACE_API(
"BTM_BleSetPrefConnParams min: %u max: %u latency: %u \
tout: %u",
min_conn_int, max_conn_int, slave_latency, supervision_tout);
if (BTM_BLE_ISVALID_PARAM(min_conn_int, BTM_BLE_CONN_INT_MIN,
BTM_BLE_CONN_INT_MAX) &&
BTM_BLE_ISVALID_PARAM(max_conn_int, BTM_BLE_CONN_INT_MIN,
BTM_BLE_CONN_INT_MAX) &&
BTM_BLE_ISVALID_PARAM(supervision_tout, BTM_BLE_CONN_SUP_TOUT_MIN,
BTM_BLE_CONN_SUP_TOUT_MAX) &&
(slave_latency <= BTM_BLE_CONN_LATENCY_MAX ||
slave_latency == BTM_BLE_CONN_PARAM_UNDEF)) {
if (p_dev_rec) {
/* expect conn int and stout and slave latency to be updated all together
*/
if (min_conn_int != BTM_BLE_CONN_PARAM_UNDEF ||
max_conn_int != BTM_BLE_CONN_PARAM_UNDEF) {
if (min_conn_int != BTM_BLE_CONN_PARAM_UNDEF)
p_dev_rec->conn_params.min_conn_int = min_conn_int;
else
p_dev_rec->conn_params.min_conn_int = max_conn_int;
if (max_conn_int != BTM_BLE_CONN_PARAM_UNDEF)
p_dev_rec->conn_params.max_conn_int = max_conn_int;
else
p_dev_rec->conn_params.max_conn_int = min_conn_int;
if (slave_latency != BTM_BLE_CONN_PARAM_UNDEF)
p_dev_rec->conn_params.slave_latency = slave_latency;
else
p_dev_rec->conn_params.slave_latency = BTM_BLE_CONN_SLAVE_LATENCY_DEF;
if (supervision_tout != BTM_BLE_CONN_PARAM_UNDEF)
p_dev_rec->conn_params.supervision_tout = supervision_tout;
else
p_dev_rec->conn_params.supervision_tout = BTM_BLE_CONN_TIMEOUT_DEF;
}
} else {
BTM_TRACE_ERROR("Unknown Device, setting rejected");
}
} else {
BTM_TRACE_ERROR("Illegal Connection Parameters");
}
}
/*******************************************************************************
*
* Function BTM_ReadDevInfo
*
* Description This function is called to read the device/address type
* of BD address.
*
* Parameter remote_bda: remote device address
* p_dev_type: output parameter to read the device type.
* p_addr_type: output parameter to read the address type.
*
******************************************************************************/
void BTM_ReadDevInfo(const BD_ADDR remote_bda, tBT_DEVICE_TYPE* p_dev_type,
tBLE_ADDR_TYPE* p_addr_type) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(remote_bda);
tBTM_INQ_INFO* p_inq_info = BTM_InqDbRead(remote_bda);
*p_addr_type = BLE_ADDR_PUBLIC;
if (!p_dev_rec) {
*p_dev_type = BT_DEVICE_TYPE_BREDR;
/* Check with the BT manager if details about remote device are known */
if (p_inq_info != NULL) {
*p_dev_type = p_inq_info->results.device_type;
*p_addr_type = p_inq_info->results.ble_addr_type;
} else {
/* unknown device, assume BR/EDR */
BTM_TRACE_DEBUG("btm_find_dev_type - unknown device, BR/EDR assumed");
}
} else /* there is a security device record exisitng */
{
/* new inquiry result, overwrite device type in security device record */
if (p_inq_info) {
p_dev_rec->device_type = p_inq_info->results.device_type;
p_dev_rec->ble.ble_addr_type = p_inq_info->results.ble_addr_type;
}
if (memcmp(p_dev_rec->bd_addr, remote_bda, BD_ADDR_LEN) == 0 &&
memcmp(p_dev_rec->ble.pseudo_addr, remote_bda, BD_ADDR_LEN) == 0) {
*p_dev_type = p_dev_rec->device_type;
*p_addr_type = p_dev_rec->ble.ble_addr_type;
} else if (memcmp(p_dev_rec->ble.pseudo_addr, remote_bda, BD_ADDR_LEN) ==
0) {
*p_dev_type = BT_DEVICE_TYPE_BLE;
*p_addr_type = p_dev_rec->ble.ble_addr_type;
} else /* matching static adddress only */
{
*p_dev_type = BT_DEVICE_TYPE_BREDR;
*p_addr_type = BLE_ADDR_PUBLIC;
}
}
BTM_TRACE_DEBUG("btm_find_dev_type - device_type = %d addr_type = %d",
*p_dev_type, *p_addr_type);
}
/*******************************************************************************
*
* Function BTM_ReadConnectedTransportAddress
*
* Description This function is called to read the paired device/address
* type of other device paired corresponding to the BD_address
*
* Parameter remote_bda: remote device address, carry out the transport
* address
* transport: active transport
*
* Return true if an active link is identified; false otherwise
*
******************************************************************************/
bool BTM_ReadConnectedTransportAddress(BD_ADDR remote_bda,
tBT_TRANSPORT transport) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(remote_bda);
/* if no device can be located, return */
if (p_dev_rec == NULL) return false;
if (transport == BT_TRANSPORT_BR_EDR) {
if (btm_bda_to_acl(p_dev_rec->bd_addr, transport) != NULL) {
memcpy(remote_bda, p_dev_rec->bd_addr, BD_ADDR_LEN);
return true;
} else if (p_dev_rec->device_type & BT_DEVICE_TYPE_BREDR) {
memcpy(remote_bda, p_dev_rec->bd_addr, BD_ADDR_LEN);
} else
memset(remote_bda, 0, BD_ADDR_LEN);
return false;
}
if (transport == BT_TRANSPORT_LE) {
memcpy(remote_bda, p_dev_rec->ble.pseudo_addr, BD_ADDR_LEN);
if (btm_bda_to_acl(p_dev_rec->ble.pseudo_addr, transport) != NULL)
return true;
else
return false;
}
return false;
}
/*******************************************************************************
*
* Function BTM_BleReceiverTest
*
* Description This function is called to start the LE Receiver test
*
* Parameter rx_freq - Frequency Range
* p_cmd_cmpl_cback - Command Complete callback
*
******************************************************************************/
void BTM_BleReceiverTest(uint8_t rx_freq, tBTM_CMPL_CB* p_cmd_cmpl_cback) {
btm_cb.devcb.p_le_test_cmd_cmpl_cb = p_cmd_cmpl_cback;
btsnd_hcic_ble_receiver_test(rx_freq);
}
/*******************************************************************************
*
* Function BTM_BleTransmitterTest
*
* Description This function is called to start the LE Transmitter test
*
* Parameter tx_freq - Frequency Range
* test_data_len - Length in bytes of payload data in each
* packet
* packet_payload - Pattern to use in the payload
* p_cmd_cmpl_cback - Command Complete callback
*
******************************************************************************/
void BTM_BleTransmitterTest(uint8_t tx_freq, uint8_t test_data_len,
uint8_t packet_payload,
tBTM_CMPL_CB* p_cmd_cmpl_cback) {
btm_cb.devcb.p_le_test_cmd_cmpl_cb = p_cmd_cmpl_cback;
btsnd_hcic_ble_transmitter_test(tx_freq, test_data_len, packet_payload);
}
/*******************************************************************************
*
* Function BTM_BleTestEnd
*
* Description This function is called to stop the in-progress TX or RX
* test
*
* Parameter p_cmd_cmpl_cback - Command complete callback
*
******************************************************************************/
void BTM_BleTestEnd(tBTM_CMPL_CB* p_cmd_cmpl_cback) {
btm_cb.devcb.p_le_test_cmd_cmpl_cb = p_cmd_cmpl_cback;
btsnd_hcic_ble_test_end();
}
/*******************************************************************************
* Internal Functions
******************************************************************************/
void btm_ble_test_command_complete(uint8_t* p) {
tBTM_CMPL_CB* p_cb = btm_cb.devcb.p_le_test_cmd_cmpl_cb;
btm_cb.devcb.p_le_test_cmd_cmpl_cb = NULL;
if (p_cb) {
(*p_cb)(p);
}
}
/*******************************************************************************
*
* Function BTM_UseLeLink
*
* Description This function is to select the underlying physical link to
* use.
*
* Returns true to use LE, false use BR/EDR.
*
******************************************************************************/
bool BTM_UseLeLink(BD_ADDR bd_addr) {
tACL_CONN* p;
tBT_DEVICE_TYPE dev_type;
tBLE_ADDR_TYPE addr_type;
bool use_le = false;
p = btm_bda_to_acl(bd_addr, BT_TRANSPORT_BR_EDR);
if (p != NULL) {
return use_le;
} else {
p = btm_bda_to_acl(bd_addr, BT_TRANSPORT_LE);
if (p != NULL) {
use_le = true;
} else {
BTM_ReadDevInfo(bd_addr, &dev_type, &addr_type);
use_le = (dev_type == BT_DEVICE_TYPE_BLE);
}
}
return use_le;
}
/*******************************************************************************
*
* Function BTM_SetBleDataLength
*
* Description This function is to set maximum BLE transmission packet size
*
* Returns BTM_SUCCESS if success; otherwise failed.
*
******************************************************************************/
tBTM_STATUS BTM_SetBleDataLength(BD_ADDR bd_addr, uint16_t tx_pdu_length) {
tACL_CONN* p_acl = btm_bda_to_acl(bd_addr, BT_TRANSPORT_LE);
if (p_acl == NULL) {
BTM_TRACE_ERROR("%s: Wrong mode: no LE link exist or LE not supported",
__func__);
return BTM_WRONG_MODE;
}
BTM_TRACE_DEBUG("%s: tx_pdu_length =%d", __func__, tx_pdu_length);
if (!controller_get_interface()->supports_ble_packet_extension()) {
BTM_TRACE_ERROR("%s failed, request not supported", __func__);
return BTM_ILLEGAL_VALUE;
}
if (!HCI_LE_DATA_LEN_EXT_SUPPORTED(p_acl->peer_le_features)) {
BTM_TRACE_ERROR("%s failed, peer does not support request", __func__);
return BTM_ILLEGAL_VALUE;
}
if (tx_pdu_length > BTM_BLE_DATA_SIZE_MAX)
tx_pdu_length = BTM_BLE_DATA_SIZE_MAX;
else if (tx_pdu_length < BTM_BLE_DATA_SIZE_MIN)
tx_pdu_length = BTM_BLE_DATA_SIZE_MIN;
/* always set the TxTime to be max, as controller does not care for now */
btsnd_hcic_ble_set_data_length(p_acl->hci_handle, tx_pdu_length,
BTM_BLE_DATA_TX_TIME_MAX);
return BTM_SUCCESS;
}
/*******************************************************************************
*
* Function btm_ble_determine_security_act
*
* Description This function checks the security of current LE link
* and returns the appropriate action that needs to be
* taken to achieve the required security.
*
* Parameter is_originator - True if outgoing connection
* bdaddr: remote device address
* security_required: Security required for the service.
*
* Returns The appropriate security action required.
*
******************************************************************************/
tBTM_SEC_ACTION btm_ble_determine_security_act(bool is_originator,
BD_ADDR bdaddr,
uint16_t security_required) {
tBTM_LE_AUTH_REQ auth_req = 0x00;
if (is_originator) {
if ((security_required & BTM_SEC_OUT_FLAGS) == 0 &&
(security_required & BTM_SEC_OUT_MITM) == 0) {
BTM_TRACE_DEBUG("%s No security required for outgoing connection",
__func__);
return BTM_SEC_OK;
}
if (security_required & BTM_SEC_OUT_MITM) auth_req |= BTM_LE_AUTH_REQ_MITM;
} else {
if ((security_required & BTM_SEC_IN_FLAGS) == 0 &&
(security_required & BTM_SEC_IN_MITM) == 0) {
BTM_TRACE_DEBUG("%s No security required for incoming connection",
__func__);
return BTM_SEC_OK;
}
if (security_required & BTM_SEC_IN_MITM) auth_req |= BTM_LE_AUTH_REQ_MITM;
}
tBTM_BLE_SEC_REQ_ACT ble_sec_act;
btm_ble_link_sec_check(bdaddr, auth_req, &ble_sec_act);
BTM_TRACE_DEBUG("%s ble_sec_act %d", __func__, ble_sec_act);
if (ble_sec_act == BTM_BLE_SEC_REQ_ACT_DISCARD) return BTM_SEC_ENC_PENDING;
if (ble_sec_act == BTM_BLE_SEC_REQ_ACT_NONE) return BTM_SEC_OK;
uint8_t sec_flag = 0;
BTM_GetSecurityFlagsByTransport(bdaddr, &sec_flag, BT_TRANSPORT_LE);
bool is_link_encrypted = false;
bool is_key_mitm = false;
if (sec_flag & (BTM_SEC_FLAG_ENCRYPTED | BTM_SEC_FLAG_LKEY_KNOWN)) {
if (sec_flag & BTM_SEC_FLAG_ENCRYPTED) is_link_encrypted = true;
if (sec_flag & BTM_SEC_FLAG_LKEY_AUTHED) is_key_mitm = true;
}
if (auth_req & BTM_LE_AUTH_REQ_MITM) {
if (!is_key_mitm) {
return BTM_SEC_ENCRYPT_MITM;
} else {
if (is_link_encrypted)
return BTM_SEC_OK;
else
return BTM_SEC_ENCRYPT;
}
} else {
if (is_link_encrypted)
return BTM_SEC_OK;
else
return BTM_SEC_ENCRYPT_NO_MITM;
}
return BTM_SEC_OK;
}
/*******************************************************************************
*
* Function btm_ble_start_sec_check
*
* Description This function is to check and set the security required for
* LE link for LE COC.
*
* Parameter bdaddr: remote device address.
* psm : PSM of the LE COC sevice.
* is_originator: true if outgoing connection.
* p_callback : Pointer to the callback function.
* p_ref_data : Pointer to be returned along with the callback.
*
* Returns true if link already meets the required security; otherwise
* false.
*
******************************************************************************/
bool btm_ble_start_sec_check(BD_ADDR bd_addr, uint16_t psm, bool is_originator,
tBTM_SEC_CALLBACK* p_callback, void* p_ref_data) {
/* Find the service record for the PSM */
tBTM_SEC_SERV_REC* p_serv_rec = btm_sec_find_first_serv(is_originator, psm);
/* If there is no application registered with this PSM do not allow connection
*/
if (!p_serv_rec) {
BTM_TRACE_WARNING("%s PSM: %d no application registerd", __func__, psm);
(*p_callback)(bd_addr, BT_TRANSPORT_LE, p_ref_data, BTM_MODE_UNSUPPORTED);
return false;
}
tBTM_SEC_ACTION sec_act = btm_ble_determine_security_act(
is_originator, bd_addr, p_serv_rec->security_flags);
tBTM_BLE_SEC_ACT ble_sec_act = BTM_BLE_SEC_NONE;
bool status = false;
switch (sec_act) {
case BTM_SEC_OK:
BTM_TRACE_DEBUG("%s Security met", __func__);
p_callback(bd_addr, BT_TRANSPORT_LE, p_ref_data, BTM_SUCCESS);
status = true;
break;
case BTM_SEC_ENCRYPT:
BTM_TRACE_DEBUG("%s Encryption needs to be done", __func__);
ble_sec_act = BTM_BLE_SEC_ENCRYPT;
break;
case BTM_SEC_ENCRYPT_MITM:
BTM_TRACE_DEBUG("%s Pairing with MITM needs to be done", __func__);
ble_sec_act = BTM_BLE_SEC_ENCRYPT_MITM;
break;
case BTM_SEC_ENCRYPT_NO_MITM:
BTM_TRACE_DEBUG("%s Pairing with No MITM needs to be done", __func__);
ble_sec_act = BTM_BLE_SEC_ENCRYPT_NO_MITM;
break;
case BTM_SEC_ENC_PENDING:
BTM_TRACE_DEBUG("%s Ecryption pending", __func__);
break;
}
if (ble_sec_act == BTM_BLE_SEC_NONE) return status;
tL2C_LCB* p_lcb = l2cu_find_lcb_by_bd_addr(bd_addr, BT_TRANSPORT_LE);
p_lcb->sec_act = sec_act;
BTM_SetEncryption(bd_addr, BT_TRANSPORT_LE, p_callback, p_ref_data,
ble_sec_act);
return false;
}
/*******************************************************************************
*
* Function btm_ble_rand_enc_complete
*
* Description This function is the callback functions for HCI_Rand command
* and HCI_Encrypt command is completed.
* This message is received from the HCI.
*
* Returns void
*
******************************************************************************/
void btm_ble_rand_enc_complete(uint8_t* p, uint16_t op_code,
tBTM_RAND_ENC_CB* p_enc_cplt_cback) {
tBTM_RAND_ENC params;
uint8_t* p_dest = params.param_buf;
BTM_TRACE_DEBUG("btm_ble_rand_enc_complete");
memset(¶ms, 0, sizeof(tBTM_RAND_ENC));
/* If there was a callback address for vcs complete, call it */
if (p_enc_cplt_cback && p) {
/* Pass paramters to the callback function */
STREAM_TO_UINT8(params.status, p); /* command status */
if (params.status == HCI_SUCCESS) {
params.opcode = op_code;
if (op_code == HCI_BLE_RAND)
params.param_len = BT_OCTET8_LEN;
else
params.param_len = BT_OCTET16_LEN;
/* Fetch return info from HCI event message */
memcpy(p_dest, p, params.param_len);
}
if (p_enc_cplt_cback) /* Call the Encryption complete callback function */
(*p_enc_cplt_cback)(¶ms);
}
}
/*******************************************************************************
*
* Function btm_ble_get_enc_key_type
*
* Description This function is to increment local sign counter
* Returns None
*
******************************************************************************/
void btm_ble_increment_sign_ctr(BD_ADDR bd_addr, bool is_local) {
tBTM_SEC_DEV_REC* p_dev_rec;
BTM_TRACE_DEBUG("btm_ble_increment_sign_ctr is_local=%d", is_local);
p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec != NULL) {
if (is_local)
p_dev_rec->ble.keys.local_counter++;
else
p_dev_rec->ble.keys.counter++;
BTM_TRACE_DEBUG("is_local=%d local sign counter=%d peer sign counter=%d",
is_local, p_dev_rec->ble.keys.local_counter,
p_dev_rec->ble.keys.counter);
}
}
/*******************************************************************************
*
* Function btm_ble_get_enc_key_type
*
* Description This function is to get the BLE key type that has been
* exchanged betweem the local device and the peer device.
*
* Returns p_key_type: output parameter to carry the key type value.
*
******************************************************************************/
bool btm_ble_get_enc_key_type(BD_ADDR bd_addr, uint8_t* p_key_types) {
tBTM_SEC_DEV_REC* p_dev_rec;
BTM_TRACE_DEBUG("btm_ble_get_enc_key_type");
p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec != NULL) {
*p_key_types = p_dev_rec->ble.key_type;
return true;
}
return false;
}
/*******************************************************************************
*
* Function btm_get_local_div
*
* Description This function is called to read the local DIV
*
* Returns TURE - if a valid DIV is availavle
******************************************************************************/
bool btm_get_local_div(BD_ADDR bd_addr, uint16_t* p_div) {
tBTM_SEC_DEV_REC* p_dev_rec;
bool status = false;
BTM_TRACE_DEBUG("btm_get_local_div");
BTM_TRACE_DEBUG("bd_addr:%02x-%02x-%02x-%02x-%02x-%02x", bd_addr[0],
bd_addr[1], bd_addr[2], bd_addr[3], bd_addr[4], bd_addr[5]);
*p_div = 0;
p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec && p_dev_rec->ble.keys.div) {
status = true;
*p_div = p_dev_rec->ble.keys.div;
}
BTM_TRACE_DEBUG("btm_get_local_div status=%d (1-OK) DIV=0x%x", status,
*p_div);
return status;
}
/*******************************************************************************
*
* Function btm_sec_save_le_key
*
* Description This function is called by the SMP to update
* an BLE key. SMP is internal, whereas all the keys shall
* be sent to the application. The function is also called
* when application passes ble key stored in NVRAM to the
* btm_sec.
* pass_to_application parameter is false in this case.
*
* Returns void
*
******************************************************************************/
void btm_sec_save_le_key(BD_ADDR bd_addr, tBTM_LE_KEY_TYPE key_type,
tBTM_LE_KEY_VALUE* p_keys, bool pass_to_application) {
tBTM_SEC_DEV_REC* p_rec;
tBTM_LE_EVT_DATA cb_data;
uint8_t i;
BTM_TRACE_DEBUG("btm_sec_save_le_key key_type=0x%x pass_to_application=%d",
key_type, pass_to_application);
/* Store the updated key in the device database */
BTM_TRACE_DEBUG("bd_addr:%02x-%02x-%02x-%02x-%02x-%02x", bd_addr[0],
bd_addr[1], bd_addr[2], bd_addr[3], bd_addr[4], bd_addr[5]);
if ((p_rec = btm_find_dev(bd_addr)) != NULL &&
(p_keys || key_type == BTM_LE_KEY_LID)) {
btm_ble_init_pseudo_addr(p_rec, bd_addr);
switch (key_type) {
case BTM_LE_KEY_PENC:
memcpy(p_rec->ble.keys.pltk, p_keys->penc_key.ltk, BT_OCTET16_LEN);
memcpy(p_rec->ble.keys.rand, p_keys->penc_key.rand, BT_OCTET8_LEN);
p_rec->ble.keys.sec_level = p_keys->penc_key.sec_level;
p_rec->ble.keys.ediv = p_keys->penc_key.ediv;
p_rec->ble.keys.key_size = p_keys->penc_key.key_size;
p_rec->ble.key_type |= BTM_LE_KEY_PENC;
p_rec->sec_flags |= BTM_SEC_LE_LINK_KEY_KNOWN;
if (p_keys->penc_key.sec_level == SMP_SEC_AUTHENTICATED)
p_rec->sec_flags |= BTM_SEC_LE_LINK_KEY_AUTHED;
else
p_rec->sec_flags &= ~BTM_SEC_LE_LINK_KEY_AUTHED;
BTM_TRACE_DEBUG(
"BTM_LE_KEY_PENC key_type=0x%x sec_flags=0x%x sec_leve=0x%x",
p_rec->ble.key_type, p_rec->sec_flags, p_rec->ble.keys.sec_level);
break;
case BTM_LE_KEY_PID:
for (i = 0; i < BT_OCTET16_LEN; i++) {
p_rec->ble.keys.irk[i] = p_keys->pid_key.irk[i];
}
// memcpy( p_rec->ble.keys.irk, p_keys->pid_key, BT_OCTET16_LEN); todo
// will crash the system
memcpy(p_rec->ble.static_addr, p_keys->pid_key.static_addr,
BD_ADDR_LEN);
p_rec->ble.static_addr_type = p_keys->pid_key.addr_type;
p_rec->ble.key_type |= BTM_LE_KEY_PID;
BTM_TRACE_DEBUG("BTM_LE_KEY_PID key_type=0x%x save peer IRK",
p_rec->ble.key_type);
/* update device record address as static address */
memcpy(p_rec->bd_addr, p_keys->pid_key.static_addr, BD_ADDR_LEN);
/* combine DUMO device security record if needed */
btm_consolidate_dev(p_rec);
break;
case BTM_LE_KEY_PCSRK:
memcpy(p_rec->ble.keys.pcsrk, p_keys->pcsrk_key.csrk, BT_OCTET16_LEN);
p_rec->ble.keys.srk_sec_level = p_keys->pcsrk_key.sec_level;
p_rec->ble.keys.counter = p_keys->pcsrk_key.counter;
p_rec->ble.key_type |= BTM_LE_KEY_PCSRK;
p_rec->sec_flags |= BTM_SEC_LE_LINK_KEY_KNOWN;
if (p_keys->pcsrk_key.sec_level == SMP_SEC_AUTHENTICATED)
p_rec->sec_flags |= BTM_SEC_LE_LINK_KEY_AUTHED;
else
p_rec->sec_flags &= ~BTM_SEC_LE_LINK_KEY_AUTHED;
BTM_TRACE_DEBUG(
"BTM_LE_KEY_PCSRK key_type=0x%x sec_flags=0x%x sec_level=0x%x "
"peer_counter=%d",
p_rec->ble.key_type, p_rec->sec_flags,
p_rec->ble.keys.srk_sec_level, p_rec->ble.keys.counter);
break;
case BTM_LE_KEY_LENC:
memcpy(p_rec->ble.keys.lltk, p_keys->lenc_key.ltk, BT_OCTET16_LEN);
p_rec->ble.keys.div = p_keys->lenc_key.div; /* update DIV */
p_rec->ble.keys.sec_level = p_keys->lenc_key.sec_level;
p_rec->ble.keys.key_size = p_keys->lenc_key.key_size;
p_rec->ble.key_type |= BTM_LE_KEY_LENC;
BTM_TRACE_DEBUG(
"BTM_LE_KEY_LENC key_type=0x%x DIV=0x%x key_size=0x%x "
"sec_level=0x%x",
p_rec->ble.key_type, p_rec->ble.keys.div, p_rec->ble.keys.key_size,
p_rec->ble.keys.sec_level);
break;
case BTM_LE_KEY_LCSRK: /* local CSRK has been delivered */
memcpy(p_rec->ble.keys.lcsrk, p_keys->lcsrk_key.csrk, BT_OCTET16_LEN);
p_rec->ble.keys.div = p_keys->lcsrk_key.div; /* update DIV */
p_rec->ble.keys.local_csrk_sec_level = p_keys->lcsrk_key.sec_level;
p_rec->ble.keys.local_counter = p_keys->lcsrk_key.counter;
p_rec->ble.key_type |= BTM_LE_KEY_LCSRK;
BTM_TRACE_DEBUG(
"BTM_LE_KEY_LCSRK key_type=0x%x DIV=0x%x scrk_sec_level=0x%x "
"local_counter=%d",
p_rec->ble.key_type, p_rec->ble.keys.div,
p_rec->ble.keys.local_csrk_sec_level,
p_rec->ble.keys.local_counter);
break;
case BTM_LE_KEY_LID:
p_rec->ble.key_type |= BTM_LE_KEY_LID;
break;
default:
BTM_TRACE_WARNING("btm_sec_save_le_key (Bad key_type 0x%02x)",
key_type);
return;
}
BTM_TRACE_DEBUG(
"BLE key type 0x%02x updated for BDA: %08x%04x (btm_sec_save_le_key)",
key_type, (bd_addr[0] << 24) + (bd_addr[1] << 16) + (bd_addr[2] << 8) +
bd_addr[3],
(bd_addr[4] << 8) + bd_addr[5]);
/* Notify the application that one of the BLE keys has been updated
If link key is in progress, it will get sent later.*/
if (pass_to_application && btm_cb.api.p_le_callback) {
cb_data.key.p_key_value = p_keys;
cb_data.key.key_type = key_type;
(*btm_cb.api.p_le_callback)(BTM_LE_KEY_EVT, bd_addr, &cb_data);
}
return;
}
BTM_TRACE_WARNING(
"BLE key type 0x%02x called for Unknown BDA or type: %08x%04x !! "
"(btm_sec_save_le_key)",
key_type,
(bd_addr[0] << 24) + (bd_addr[1] << 16) + (bd_addr[2] << 8) + bd_addr[3],
(bd_addr[4] << 8) + bd_addr[5]);
if (p_rec) {
BTM_TRACE_DEBUG("sec_flags=0x%x", p_rec->sec_flags);
}
}
/*******************************************************************************
*
* Function btm_ble_update_sec_key_size
*
* Description update the current lin kencryption key size
*
* Returns void
*
******************************************************************************/
void btm_ble_update_sec_key_size(BD_ADDR bd_addr, uint8_t enc_key_size) {
tBTM_SEC_DEV_REC* p_rec;
BTM_TRACE_DEBUG("btm_ble_update_sec_key_size enc_key_size = %d",
enc_key_size);
p_rec = btm_find_dev(bd_addr);
if (p_rec != NULL) {
p_rec->enc_key_size = enc_key_size;
}
}
/*******************************************************************************
*
* Function btm_ble_read_sec_key_size
*
* Description update the current lin kencryption key size
*
* Returns void
*
******************************************************************************/
uint8_t btm_ble_read_sec_key_size(BD_ADDR bd_addr) {
tBTM_SEC_DEV_REC* p_rec;
p_rec = btm_find_dev(bd_addr);
if (p_rec != NULL) {
return p_rec->enc_key_size;
} else
return 0;
}
/*******************************************************************************
*
* Function btm_ble_link_sec_check
*
* Description Check BLE link security level match.
*
* Returns true: check is OK and the *p_sec_req_act contain the action
*
******************************************************************************/
void btm_ble_link_sec_check(BD_ADDR bd_addr, tBTM_LE_AUTH_REQ auth_req,
tBTM_BLE_SEC_REQ_ACT* p_sec_req_act) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
uint8_t req_sec_level = BTM_LE_SEC_NONE, cur_sec_level = BTM_LE_SEC_NONE;
BTM_TRACE_DEBUG("btm_ble_link_sec_check auth_req =0x%x", auth_req);
if (p_dev_rec == NULL) {
BTM_TRACE_ERROR("btm_ble_link_sec_check received for unknown device");
return;
}
if (p_dev_rec->sec_state == BTM_SEC_STATE_ENCRYPTING ||
p_dev_rec->sec_state == BTM_SEC_STATE_AUTHENTICATING) {
/* race condition: discard the security request while master is encrypting
* the link */
*p_sec_req_act = BTM_BLE_SEC_REQ_ACT_DISCARD;
} else {
req_sec_level = BTM_LE_SEC_UNAUTHENTICATE;
if (auth_req & BTM_LE_AUTH_REQ_MITM) {
req_sec_level = BTM_LE_SEC_AUTHENTICATED;
}
BTM_TRACE_DEBUG("dev_rec sec_flags=0x%x", p_dev_rec->sec_flags);
/* currently encrpted */
if (p_dev_rec->sec_flags & BTM_SEC_LE_ENCRYPTED) {
if (p_dev_rec->sec_flags & BTM_SEC_LE_AUTHENTICATED)
cur_sec_level = BTM_LE_SEC_AUTHENTICATED;
else
cur_sec_level = BTM_LE_SEC_UNAUTHENTICATE;
} else /* unencrypted link */
{
/* if bonded, get the key security level */
if (p_dev_rec->ble.key_type & BTM_LE_KEY_PENC)
cur_sec_level = p_dev_rec->ble.keys.sec_level;
else
cur_sec_level = BTM_LE_SEC_NONE;
}
if (cur_sec_level >= req_sec_level) {
/* To avoid re-encryption on an encrypted link for an equal condition
* encryption */
*p_sec_req_act = BTM_BLE_SEC_REQ_ACT_ENCRYPT;
} else {
/* start the pariring process to upgrade the keys*/
*p_sec_req_act = BTM_BLE_SEC_REQ_ACT_PAIR;
}
}
BTM_TRACE_DEBUG("cur_sec_level=%d req_sec_level=%d sec_req_act=%d",
cur_sec_level, req_sec_level, *p_sec_req_act);
}
/*******************************************************************************
*
* Function btm_ble_set_encryption
*
* Description This function is called to ensure that LE connection is
* encrypted. Should be called only on an open connection.
* Typically only needed for connections that first want to
* bring up unencrypted links, then later encrypt them.
*
* Returns void
* the local device ER is copied into er
*
******************************************************************************/
tBTM_STATUS btm_ble_set_encryption(BD_ADDR bd_addr, tBTM_BLE_SEC_ACT sec_act,
uint8_t link_role) {
tBTM_STATUS cmd = BTM_NO_RESOURCES;
tBTM_SEC_DEV_REC* p_rec = btm_find_dev(bd_addr);
tBTM_BLE_SEC_REQ_ACT sec_req_act;
tBTM_LE_AUTH_REQ auth_req;
if (p_rec == NULL) {
BTM_TRACE_WARNING(
"btm_ble_set_encryption (NULL device record!! sec_act=0x%x", sec_act);
return (BTM_WRONG_MODE);
}
BTM_TRACE_DEBUG("btm_ble_set_encryption sec_act=0x%x role_master=%d", sec_act,
p_rec->role_master);
if (sec_act == BTM_BLE_SEC_ENCRYPT_MITM) {
p_rec->security_required |= BTM_SEC_IN_MITM;
}
switch (sec_act) {
case BTM_BLE_SEC_ENCRYPT:
if (link_role == BTM_ROLE_MASTER) {
/* start link layer encryption using the security info stored */
cmd = btm_ble_start_encrypt(bd_addr, false, NULL);
break;
}
/* if salve role then fall through to call SMP_Pair below which will send a
sec_request to request the master to encrypt the link */
case BTM_BLE_SEC_ENCRYPT_NO_MITM:
case BTM_BLE_SEC_ENCRYPT_MITM:
auth_req = (sec_act == BTM_BLE_SEC_ENCRYPT_NO_MITM)
? SMP_AUTH_GEN_BOND
: (SMP_AUTH_GEN_BOND | SMP_AUTH_YN_BIT);
btm_ble_link_sec_check(bd_addr, auth_req, &sec_req_act);
if (sec_req_act == BTM_BLE_SEC_REQ_ACT_NONE ||
sec_req_act == BTM_BLE_SEC_REQ_ACT_DISCARD) {
BTM_TRACE_DEBUG("%s, no action needed. Ignore", __func__);
cmd = BTM_SUCCESS;
break;
}
if (link_role == BTM_ROLE_MASTER) {
if (sec_req_act == BTM_BLE_SEC_REQ_ACT_ENCRYPT) {
cmd = btm_ble_start_encrypt(bd_addr, false, NULL);
break;
}
}
if (SMP_Pair(bd_addr) == SMP_STARTED) {
cmd = BTM_CMD_STARTED;
p_rec->sec_state = BTM_SEC_STATE_AUTHENTICATING;
}
break;
default:
cmd = BTM_WRONG_MODE;
break;
}
return cmd;
}
/*******************************************************************************
*
* Function btm_ble_ltk_request
*
* Description This function is called when encryption request is received
* on a slave device.
*
*
* Returns void
*
******************************************************************************/
void btm_ble_ltk_request(uint16_t handle, uint8_t rand[8], uint16_t ediv) {
tBTM_CB* p_cb = &btm_cb;
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev_by_handle(handle);
BT_OCTET8 dummy_stk = {0};
BTM_TRACE_DEBUG("btm_ble_ltk_request");
p_cb->ediv = ediv;
memcpy(p_cb->enc_rand, rand, BT_OCTET8_LEN);
if (p_dev_rec != NULL) {
if (!smp_proc_ltk_request(p_dev_rec->bd_addr))
btm_ble_ltk_request_reply(p_dev_rec->bd_addr, false, dummy_stk);
}
}
/*******************************************************************************
*
* Function btm_ble_start_encrypt
*
* Description This function is called to start LE encryption.
*
*
* Returns BTM_SUCCESS if encryption was started successfully
*
******************************************************************************/
tBTM_STATUS btm_ble_start_encrypt(BD_ADDR bda, bool use_stk, BT_OCTET16 stk) {
tBTM_CB* p_cb = &btm_cb;
tBTM_SEC_DEV_REC* p_rec = btm_find_dev(bda);
BT_OCTET8 dummy_rand = {0};
BTM_TRACE_DEBUG("btm_ble_start_encrypt");
if (!p_rec) {
BTM_TRACE_ERROR("Link is not active, can not encrypt!");
return BTM_WRONG_MODE;
}
if (p_rec->sec_state == BTM_SEC_STATE_ENCRYPTING) {
BTM_TRACE_WARNING("Link Encryption is active, Busy!");
return BTM_BUSY;
}
p_cb->enc_handle = p_rec->ble_hci_handle;
if (use_stk) {
btsnd_hcic_ble_start_enc(p_rec->ble_hci_handle, dummy_rand, 0, stk);
} else if (p_rec->ble.key_type & BTM_LE_KEY_PENC) {
btsnd_hcic_ble_start_enc(p_rec->ble_hci_handle, p_rec->ble.keys.rand,
p_rec->ble.keys.ediv, p_rec->ble.keys.pltk);
} else {
BTM_TRACE_ERROR("No key available to encrypt the link");
return BTM_NO_RESOURCES;
}
if (p_rec->sec_state == BTM_SEC_STATE_IDLE)
p_rec->sec_state = BTM_SEC_STATE_ENCRYPTING;
return BTM_CMD_STARTED;
}
/*******************************************************************************
*
* Function btm_ble_link_encrypted
*
* Description This function is called when LE link encrption status is
* changed.
*
* Returns void
*
******************************************************************************/
void btm_ble_link_encrypted(BD_ADDR bd_addr, uint8_t encr_enable) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
bool enc_cback;
if (!p_dev_rec) {
BTM_TRACE_WARNING(
"btm_ble_link_encrypted (No Device Found!) encr_enable=%d",
encr_enable);
return;
}
BTM_TRACE_DEBUG("btm_ble_link_encrypted encr_enable=%d", encr_enable);
enc_cback = (p_dev_rec->sec_state == BTM_SEC_STATE_ENCRYPTING);
smp_link_encrypted(bd_addr, encr_enable);
BTM_TRACE_DEBUG(" p_dev_rec->sec_flags=0x%x", p_dev_rec->sec_flags);
if (encr_enable && p_dev_rec->enc_key_size == 0)
p_dev_rec->enc_key_size = p_dev_rec->ble.keys.key_size;
p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;
if (p_dev_rec->p_callback && enc_cback) {
if (encr_enable)
btm_sec_dev_rec_cback_event(p_dev_rec, BTM_SUCCESS, true);
else if (p_dev_rec->role_master)
btm_sec_dev_rec_cback_event(p_dev_rec, BTM_ERR_PROCESSING, true);
}
/* to notify GATT to send data if any request is pending */
gatt_notify_enc_cmpl(p_dev_rec->ble.pseudo_addr);
}
/*******************************************************************************
*
* Function btm_ble_ltk_request_reply
*
* Description This function is called to send a LTK request reply on a
* slave
* device.
*
* Returns void
*
******************************************************************************/
void btm_ble_ltk_request_reply(BD_ADDR bda, bool use_stk, BT_OCTET16 stk) {
tBTM_SEC_DEV_REC* p_rec = btm_find_dev(bda);
tBTM_CB* p_cb = &btm_cb;
if (p_rec == NULL) {
BTM_TRACE_ERROR("btm_ble_ltk_request_reply received for unknown device");
return;
}
BTM_TRACE_DEBUG("btm_ble_ltk_request_reply");
p_cb->enc_handle = p_rec->ble_hci_handle;
p_cb->key_size = p_rec->ble.keys.key_size;
BTM_TRACE_ERROR("key size = %d", p_rec->ble.keys.key_size);
if (use_stk) {
btsnd_hcic_ble_ltk_req_reply(btm_cb.enc_handle, stk);
} else /* calculate LTK using peer device */
{
if (p_rec->ble.key_type & BTM_LE_KEY_LENC)
btsnd_hcic_ble_ltk_req_reply(btm_cb.enc_handle, p_rec->ble.keys.lltk);
else
btsnd_hcic_ble_ltk_req_neg_reply(btm_cb.enc_handle);
}
}
/*******************************************************************************
*
* Function btm_ble_io_capabilities_req
*
* Description This function is called to handle SMP get IO capability
* request.
*
* Returns void
*
******************************************************************************/
uint8_t btm_ble_io_capabilities_req(tBTM_SEC_DEV_REC* p_dev_rec,
tBTM_LE_IO_REQ* p_data) {
uint8_t callback_rc = BTM_SUCCESS;
BTM_TRACE_DEBUG("btm_ble_io_capabilities_req");
if (btm_cb.api.p_le_callback) {
/* the callback function implementation may change the IO capability... */
callback_rc = (*btm_cb.api.p_le_callback)(
BTM_LE_IO_REQ_EVT, p_dev_rec->bd_addr, (tBTM_LE_EVT_DATA*)p_data);
}
if ((callback_rc == BTM_SUCCESS) || (BTM_OOB_UNKNOWN != p_data->oob_data)) {
#if (BTM_BLE_CONFORMANCE_TESTING == TRUE)
if (btm_cb.devcb.keep_rfu_in_auth_req) {
BTM_TRACE_DEBUG("btm_ble_io_capabilities_req keep_rfu_in_auth_req = %u",
btm_cb.devcb.keep_rfu_in_auth_req);
p_data->auth_req &= BTM_LE_AUTH_REQ_MASK_KEEP_RFU;
btm_cb.devcb.keep_rfu_in_auth_req = false;
} else { /* default */
p_data->auth_req &= BTM_LE_AUTH_REQ_MASK;
}
#else
p_data->auth_req &= BTM_LE_AUTH_REQ_MASK;
#endif
BTM_TRACE_DEBUG(
"btm_ble_io_capabilities_req 1: p_dev_rec->security_required = %d "
"auth_req:%d",
p_dev_rec->security_required, p_data->auth_req);
BTM_TRACE_DEBUG(
"btm_ble_io_capabilities_req 2: i_keys=0x%x r_keys=0x%x (bit 0-LTK "
"1-IRK 2-CSRK)",
p_data->init_keys, p_data->resp_keys);
/* if authentication requires MITM protection, put on the mask */
if (p_dev_rec->security_required & BTM_SEC_IN_MITM)
p_data->auth_req |= BTM_LE_AUTH_REQ_MITM;
if (!(p_data->auth_req & SMP_AUTH_BOND)) {
BTM_TRACE_DEBUG("Non bonding: No keys should be exchanged");
p_data->init_keys = 0;
p_data->resp_keys = 0;
}
BTM_TRACE_DEBUG("btm_ble_io_capabilities_req 3: auth_req:%d",
p_data->auth_req);
BTM_TRACE_DEBUG("btm_ble_io_capabilities_req 4: i_keys=0x%x r_keys=0x%x",
p_data->init_keys, p_data->resp_keys);
BTM_TRACE_DEBUG(
"btm_ble_io_capabilities_req 5: p_data->io_cap = %d auth_req:%d",
p_data->io_cap, p_data->auth_req);
/* remove MITM protection requirement if IO cap does not allow it */
if ((p_data->io_cap == BTM_IO_CAP_NONE) && p_data->oob_data == SMP_OOB_NONE)
p_data->auth_req &= ~BTM_LE_AUTH_REQ_MITM;
if (!(p_data->auth_req & SMP_SC_SUPPORT_BIT)) {
/* if Secure Connections are not supported then remove LK derivation,
** and keypress notifications.
*/
BTM_TRACE_DEBUG(
"%s-SC not supported -> No LK derivation, no keypress notifications",
__func__);
p_data->auth_req &= ~SMP_KP_SUPPORT_BIT;
p_data->init_keys &= ~SMP_SEC_KEY_TYPE_LK;
p_data->resp_keys &= ~SMP_SEC_KEY_TYPE_LK;
}
BTM_TRACE_DEBUG(
"btm_ble_io_capabilities_req 6: IO_CAP:%d oob_data:%d auth_req:0x%02x",
p_data->io_cap, p_data->oob_data, p_data->auth_req);
}
return callback_rc;
}
/*******************************************************************************
*
* Function btm_ble_br_keys_req
*
* Description This function is called to handle SMP request for keys sent
* over BR/EDR.
*
* Returns void
*
******************************************************************************/
uint8_t btm_ble_br_keys_req(tBTM_SEC_DEV_REC* p_dev_rec,
tBTM_LE_IO_REQ* p_data) {
uint8_t callback_rc = BTM_SUCCESS;
BTM_TRACE_DEBUG("%s", __func__);
if (btm_cb.api.p_le_callback) {
/* the callback function implementation may change the IO capability... */
callback_rc = (*btm_cb.api.p_le_callback)(
BTM_LE_IO_REQ_EVT, p_dev_rec->bd_addr, (tBTM_LE_EVT_DATA*)p_data);
}
return callback_rc;
}
/*******************************************************************************
*
* Function btm_ble_connected
*
* Description This function is when a LE connection to the peer device is
* establsihed
*
* Returns void
*
******************************************************************************/
void btm_ble_connected(uint8_t* bda, uint16_t handle, uint8_t enc_mode,
uint8_t role, tBLE_ADDR_TYPE addr_type,
UNUSED_ATTR bool addr_matched) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bda);
tBTM_BLE_CB* p_cb = &btm_cb.ble_ctr_cb;
BTM_TRACE_EVENT("btm_ble_connected");
/* Commenting out trace due to obf/compilation problems.
*/
if (p_dev_rec) {
BTM_TRACE_EVENT(
"Security Manager: btm_ble_connected : handle:%d enc_mode:%d bda:%x "
"RName:%s",
handle, enc_mode,
(bda[2] << 24) + (bda[3] << 16) + (bda[4] << 8) + bda[5],
p_dev_rec->sec_bd_name);
BTM_TRACE_DEBUG("btm_ble_connected sec_flags=0x%x", p_dev_rec->sec_flags);
} else {
BTM_TRACE_EVENT(
"Security Manager: btm_ble_connected: handle:%d enc_mode:%d "
"bda:%x ",
handle, enc_mode,
(bda[2] << 24) + (bda[3] << 16) + (bda[4] << 8) + bda[5]);
}
if (!p_dev_rec) {
/* There is no device record for new connection. Allocate one */
p_dev_rec = btm_sec_alloc_dev(bda);
if (p_dev_rec == NULL) return;
} else /* Update the timestamp for this device */
{
p_dev_rec->timestamp = btm_cb.dev_rec_count++;
}
/* update device information */
p_dev_rec->device_type |= BT_DEVICE_TYPE_BLE;
p_dev_rec->ble_hci_handle = handle;
p_dev_rec->ble.ble_addr_type = addr_type;
/* update pseudo address */
memcpy(p_dev_rec->ble.pseudo_addr, bda, BD_ADDR_LEN);
p_dev_rec->role_master = false;
if (role == HCI_ROLE_MASTER) p_dev_rec->role_master = true;
#if (BLE_PRIVACY_SPT == TRUE)
if (!addr_matched) p_dev_rec->ble.active_addr_type = BTM_BLE_ADDR_PSEUDO;
if (p_dev_rec->ble.ble_addr_type == BLE_ADDR_RANDOM && !addr_matched)
memcpy(p_dev_rec->ble.cur_rand_addr, bda, BD_ADDR_LEN);
#endif
p_cb->inq_var.directed_conn = BTM_BLE_CONNECT_EVT;
return;
}
/*****************************************************************************
* Function btm_ble_conn_complete
*
* Description LE connection complete.
*
*****************************************************************************/
void btm_ble_conn_complete(uint8_t* p, UNUSED_ATTR uint16_t evt_len,
bool enhanced) {
#if (BLE_PRIVACY_SPT == TRUE)
uint8_t peer_addr_type;
#endif
BD_ADDR local_rpa, peer_rpa;
uint8_t role, status, bda_type;
uint16_t handle;
BD_ADDR bda;
uint16_t conn_interval, conn_latency, conn_timeout;
bool match = false;
STREAM_TO_UINT8(status, p);
STREAM_TO_UINT16(handle, p);
STREAM_TO_UINT8(role, p);
STREAM_TO_UINT8(bda_type, p);
STREAM_TO_BDADDR(bda, p);
if (status == 0) {
if (enhanced) {
STREAM_TO_BDADDR(local_rpa, p);
STREAM_TO_BDADDR(peer_rpa, p);
}
STREAM_TO_UINT16(conn_interval, p);
STREAM_TO_UINT16(conn_latency, p);
STREAM_TO_UINT16(conn_timeout, p);
handle = HCID_GET_HANDLE(handle);
#if (BLE_PRIVACY_SPT == TRUE)
peer_addr_type = bda_type;
match = btm_identity_addr_to_random_pseudo(bda, &bda_type, true);
/* possiblly receive connection complete with resolvable random while
the device has been paired */
if (!match && BTM_BLE_IS_RESOLVE_BDA(bda)) {
tBTM_SEC_DEV_REC* match_rec = btm_ble_resolve_random_addr(bda);
if (match_rec) {
LOG_INFO(LOG_TAG, "%s matched and resolved random address", __func__);
match = true;
match_rec->ble.active_addr_type = BTM_BLE_ADDR_RRA;
memcpy(match_rec->ble.cur_rand_addr, bda, BD_ADDR_LEN);
if (!btm_ble_init_pseudo_addr(match_rec, bda)) {
/* assign the original address to be the current report address */
memcpy(bda, match_rec->ble.pseudo_addr, BD_ADDR_LEN);
} else {
memcpy(bda, match_rec->bd_addr, BD_ADDR_LEN);
}
} else {
LOG_INFO(LOG_TAG, "%s unable to match and resolve random address",
__func__);
}
}
#endif
btm_ble_connected(bda, handle, HCI_ENCRYPT_MODE_DISABLED, role, bda_type,
match);
l2cble_conn_comp(handle, role, bda, bda_type, conn_interval, conn_latency,
conn_timeout);
#if (BLE_PRIVACY_SPT == TRUE)
if (enhanced) {
btm_ble_refresh_local_resolvable_private_addr(bda, local_rpa);
if (peer_addr_type & BLE_ADDR_TYPE_ID_BIT)
btm_ble_refresh_peer_resolvable_private_addr(bda, peer_rpa,
BLE_ADDR_RANDOM);
}
#endif
} else {
role = HCI_ROLE_UNKNOWN;
if (status != HCI_ERR_DIRECTED_ADVERTISING_TIMEOUT) {
btm_ble_set_conn_st(BLE_CONN_IDLE);
#if (BLE_PRIVACY_SPT == TRUE)
btm_ble_disable_resolving_list(BTM_BLE_RL_INIT, true);
#endif
} else {
#if (BLE_PRIVACY_SPT == TRUE)
btm_cb.ble_ctr_cb.inq_var.adv_mode = BTM_BLE_ADV_DISABLE;
btm_ble_disable_resolving_list(BTM_BLE_RL_ADV, true);
#endif
}
}
btm_ble_update_mode_operation(role, bda, status);
}
/*****************************************************************************
* Function btm_ble_create_ll_conn_complete
*
* Description LE connection complete.
*
*****************************************************************************/
void btm_ble_create_ll_conn_complete(uint8_t status) {
if (status != HCI_SUCCESS) {
btm_ble_set_conn_st(BLE_CONN_IDLE);
btm_ble_update_mode_operation(HCI_ROLE_UNKNOWN, NULL, status);
}
}
/*****************************************************************************
* Function btm_proc_smp_cback
*
* Description This function is the SMP callback handler.
*
*****************************************************************************/
uint8_t btm_proc_smp_cback(tSMP_EVT event, BD_ADDR bd_addr,
tSMP_EVT_DATA* p_data) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
uint8_t res = 0;
BTM_TRACE_DEBUG("btm_proc_smp_cback event = %d", event);
if (p_dev_rec != NULL) {
switch (event) {
case SMP_IO_CAP_REQ_EVT:
btm_ble_io_capabilities_req(p_dev_rec,
(tBTM_LE_IO_REQ*)&p_data->io_req);
break;
case SMP_BR_KEYS_REQ_EVT:
btm_ble_br_keys_req(p_dev_rec, (tBTM_LE_IO_REQ*)&p_data->io_req);
break;
case SMP_PASSKEY_REQ_EVT:
case SMP_PASSKEY_NOTIF_EVT:
case SMP_OOB_REQ_EVT:
case SMP_NC_REQ_EVT:
case SMP_SC_OOB_REQ_EVT:
/* fall through */
p_dev_rec->sec_flags |= BTM_SEC_LE_AUTHENTICATED;
case SMP_SEC_REQUEST_EVT:
if (event == SMP_SEC_REQUEST_EVT &&
btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) {
BTM_TRACE_DEBUG("%s: Ignoring SMP Security request", __func__);
break;
}
memcpy(btm_cb.pairing_bda, bd_addr, BD_ADDR_LEN);
p_dev_rec->sec_state = BTM_SEC_STATE_AUTHENTICATING;
btm_cb.pairing_flags |= BTM_PAIR_FLAGS_LE_ACTIVE;
/* fall through */
case SMP_COMPLT_EVT:
if (btm_cb.api.p_le_callback) {
/* the callback function implementation may change the IO
* capability... */
BTM_TRACE_DEBUG("btm_cb.api.p_le_callback=0x%x",
btm_cb.api.p_le_callback);
(*btm_cb.api.p_le_callback)(event, bd_addr,
(tBTM_LE_EVT_DATA*)p_data);
}
if (event == SMP_COMPLT_EVT) {
BTM_TRACE_DEBUG(
"evt=SMP_COMPLT_EVT before update sec_level=0x%x sec_flags=0x%x",
p_data->cmplt.sec_level, p_dev_rec->sec_flags);
res = (p_data->cmplt.reason == SMP_SUCCESS) ? BTM_SUCCESS
: BTM_ERR_PROCESSING;
BTM_TRACE_DEBUG(
"after update result=%d sec_level=0x%x sec_flags=0x%x", res,
p_data->cmplt.sec_level, p_dev_rec->sec_flags);
if (p_data->cmplt.is_pair_cancel &&
btm_cb.api.p_bond_cancel_cmpl_callback) {
BTM_TRACE_DEBUG("Pairing Cancel completed");
(*btm_cb.api.p_bond_cancel_cmpl_callback)(BTM_SUCCESS);
}
#if (BTM_BLE_CONFORMANCE_TESTING == TRUE)
if (res != BTM_SUCCESS) {
if (!btm_cb.devcb.no_disc_if_pair_fail &&
p_data->cmplt.reason != SMP_CONN_TOUT) {
BTM_TRACE_DEBUG("Pairing failed - prepare to remove ACL");
l2cu_start_post_bond_timer(p_dev_rec->ble_hci_handle);
} else {
BTM_TRACE_DEBUG("Pairing failed - Not Removing ACL");
p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;
}
}
#else
if (res != BTM_SUCCESS && p_data->cmplt.reason != SMP_CONN_TOUT) {
BTM_TRACE_DEBUG("Pairing failed - prepare to remove ACL");
l2cu_start_post_bond_timer(p_dev_rec->ble_hci_handle);
}
#endif
BTM_TRACE_DEBUG(
"btm_cb pairing_state=%x pairing_flags=%x pin_code_len=%x",
btm_cb.pairing_state, btm_cb.pairing_flags, btm_cb.pin_code_len);
BTM_TRACE_DEBUG("btm_cb.pairing_bda %02x:%02x:%02x:%02x:%02x:%02x",
btm_cb.pairing_bda[0], btm_cb.pairing_bda[1],
btm_cb.pairing_bda[2], btm_cb.pairing_bda[3],
btm_cb.pairing_bda[4], btm_cb.pairing_bda[5]);
/* Reset btm state only if the callback address matches pairing
* address*/
if (memcmp(bd_addr, btm_cb.pairing_bda, BD_ADDR_LEN) == 0) {
memset(btm_cb.pairing_bda, 0xff, BD_ADDR_LEN);
btm_cb.pairing_state = BTM_PAIR_STATE_IDLE;
btm_cb.pairing_flags = 0;
}
if (res == BTM_SUCCESS) {
p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;
#if (BLE_PRIVACY_SPT == TRUE)
/* add all bonded device into resolving list if IRK is available*/
btm_ble_resolving_list_load_dev(p_dev_rec);
#endif
}
btm_sec_dev_rec_cback_event(p_dev_rec, res, true);
}
break;
default:
BTM_TRACE_DEBUG("unknown event = %d", event);
break;
}
} else {
BTM_TRACE_ERROR("btm_proc_smp_cback received for unknown device");
}
return 0;
}
/*******************************************************************************
*
* Function BTM_BleDataSignature
*
* Description This function is called to sign the data using AES128 CMAC
* algorith.
*
* Parameter bd_addr: target device the data to be signed for.
* p_text: singing data
* len: length of the data to be signed.
* signature: output parameter where data signature is going to
* be stored.
*
* Returns true if signing sucessul, otherwise false.
*
******************************************************************************/
bool BTM_BleDataSignature(BD_ADDR bd_addr, uint8_t* p_text, uint16_t len,
BLE_SIGNATURE signature) {
tBTM_SEC_DEV_REC* p_rec = btm_find_dev(bd_addr);
BTM_TRACE_DEBUG("%s", __func__);
bool ret = false;
if (p_rec == NULL) {
BTM_TRACE_ERROR("%s-data signing can not be done from unknown device",
__func__);
} else {
uint8_t* p_mac = (uint8_t*)signature;
uint8_t* pp;
uint8_t* p_buf = (uint8_t*)osi_malloc(len + 4);
BTM_TRACE_DEBUG("%s-Start to generate Local CSRK", __func__);
pp = p_buf;
/* prepare plain text */
if (p_text) {
memcpy(p_buf, p_text, len);
pp = (p_buf + len);
}
UINT32_TO_STREAM(pp, p_rec->ble.keys.local_counter);
UINT32_TO_STREAM(p_mac, p_rec->ble.keys.local_counter);
ret = aes_cipher_msg_auth_code(p_rec->ble.keys.lcsrk, p_buf,
(uint16_t)(len + 4), BTM_CMAC_TLEN_SIZE,
p_mac);
if (ret == true) {
btm_ble_increment_sign_ctr(bd_addr, true);
}
BTM_TRACE_DEBUG("%s p_mac = %d", __func__, p_mac);
BTM_TRACE_DEBUG(
"p_mac[0] = 0x%02x p_mac[1] = 0x%02x p_mac[2] = 0x%02x p_mac[3] = "
"0x%02x",
*p_mac, *(p_mac + 1), *(p_mac + 2), *(p_mac + 3));
BTM_TRACE_DEBUG(
"p_mac[4] = 0x%02x p_mac[5] = 0x%02x p_mac[6] = 0x%02x p_mac[7] = "
"0x%02x",
*(p_mac + 4), *(p_mac + 5), *(p_mac + 6), *(p_mac + 7));
osi_free(p_buf);
}
return ret;
}
/*******************************************************************************
*
* Function BTM_BleVerifySignature
*
* Description This function is called to verify the data signature
*
* Parameter bd_addr: target device the data to be signed for.
* p_orig: original data before signature.
* len: length of the signing data
* counter: counter used when doing data signing
* p_comp: signature to be compared against.
* Returns true if signature verified correctly; otherwise false.
*
******************************************************************************/
bool BTM_BleVerifySignature(BD_ADDR bd_addr, uint8_t* p_orig, uint16_t len,
uint32_t counter, uint8_t* p_comp) {
bool verified = false;
tBTM_SEC_DEV_REC* p_rec = btm_find_dev(bd_addr);
uint8_t p_mac[BTM_CMAC_TLEN_SIZE];
if (p_rec == NULL || (p_rec && !(p_rec->ble.key_type & BTM_LE_KEY_PCSRK))) {
BTM_TRACE_ERROR("can not verify signature for unknown device");
} else if (counter < p_rec->ble.keys.counter) {
BTM_TRACE_ERROR("signature received with out dated sign counter");
} else if (p_orig == NULL) {
BTM_TRACE_ERROR("No signature to verify");
} else {
BTM_TRACE_DEBUG("%s rcv_cnt=%d >= expected_cnt=%d", __func__, counter,
p_rec->ble.keys.counter);
if (aes_cipher_msg_auth_code(p_rec->ble.keys.pcsrk, p_orig, len,
BTM_CMAC_TLEN_SIZE, p_mac)) {
if (memcmp(p_mac, p_comp, BTM_CMAC_TLEN_SIZE) == 0) {
btm_ble_increment_sign_ctr(bd_addr, false);
verified = true;
}
}
}
return verified;
}
/*******************************************************************************
*
* Function BTM_GetLeSecurityState
*
* Description This function is called to get security mode 1 flags and
* encryption key size for LE peer.
*
* Returns bool true if LE device is found, false otherwise.
*
******************************************************************************/
bool BTM_GetLeSecurityState(BD_ADDR bd_addr, uint8_t* p_le_dev_sec_flags,
uint8_t* p_le_key_size) {
tBTM_SEC_DEV_REC* p_dev_rec;
uint16_t dev_rec_sec_flags;
*p_le_dev_sec_flags = 0;
*p_le_key_size = 0;
p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec == NULL) {
BTM_TRACE_ERROR("%s fails", __func__);
return (false);
}
if (p_dev_rec->ble_hci_handle == BTM_SEC_INVALID_HANDLE) {
BTM_TRACE_ERROR("%s-this is not LE device", __func__);
return (false);
}
dev_rec_sec_flags = p_dev_rec->sec_flags;
if (dev_rec_sec_flags & BTM_SEC_LE_ENCRYPTED) {
/* link is encrypted with LTK or STK */
*p_le_key_size = p_dev_rec->enc_key_size;
*p_le_dev_sec_flags |= BTM_SEC_LE_LINK_ENCRYPTED;
*p_le_dev_sec_flags |=
(dev_rec_sec_flags & BTM_SEC_LE_AUTHENTICATED)
? BTM_SEC_LE_LINK_PAIRED_WITH_MITM /* set auth LTK flag */
: BTM_SEC_LE_LINK_PAIRED_WITHOUT_MITM; /* set unauth LTK flag */
} else if (p_dev_rec->ble.key_type & BTM_LE_KEY_PENC) {
/* link is unencrypted, still LTK is available */
*p_le_key_size = p_dev_rec->ble.keys.key_size;
*p_le_dev_sec_flags |=
(dev_rec_sec_flags & BTM_SEC_LE_LINK_KEY_AUTHED)
? BTM_SEC_LE_LINK_PAIRED_WITH_MITM /* set auth LTK flag */
: BTM_SEC_LE_LINK_PAIRED_WITHOUT_MITM; /* set unauth LTK flag */
}
BTM_TRACE_DEBUG("%s - le_dev_sec_flags: 0x%02x, le_key_size: %d", __func__,
*p_le_dev_sec_flags, *p_le_key_size);
return true;
}
/*******************************************************************************
*
* Function BTM_BleSecurityProcedureIsRunning
*
* Description This function indicates if LE security procedure is
* currently running with the peer.
*
* Returns bool true if security procedure is running, false
* otherwise.
*
******************************************************************************/
bool BTM_BleSecurityProcedureIsRunning(BD_ADDR bd_addr) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec == NULL) {
BTM_TRACE_ERROR("%s device with BDA: %08x%04x is not found", __func__,
(bd_addr[0] << 24) + (bd_addr[1] << 16) +
(bd_addr[2] << 8) + bd_addr[3],
(bd_addr[4] << 8) + bd_addr[5]);
return false;
}
return (p_dev_rec->sec_state == BTM_SEC_STATE_ENCRYPTING ||
p_dev_rec->sec_state == BTM_SEC_STATE_AUTHENTICATING);
}
/*******************************************************************************
*
* Function BTM_BleGetSupportedKeySize
*
* Description This function gets the maximum encryption key size in bytes
* the local device can suport.
* record.
*
* Returns the key size or 0 if the size can't be retrieved.
*
******************************************************************************/
extern uint8_t BTM_BleGetSupportedKeySize(BD_ADDR bd_addr) {
#if (L2CAP_LE_COC_INCLUDED == TRUE)
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
tBTM_LE_IO_REQ dev_io_cfg;
uint8_t callback_rc;
if (!p_dev_rec) {
BTM_TRACE_ERROR("%s device with BDA: %08x%04x is not found", __func__,
(bd_addr[0] << 24) + (bd_addr[1] << 16) +
(bd_addr[2] << 8) + bd_addr[3],
(bd_addr[4] << 8) + bd_addr[5]);
return 0;
}
if (btm_cb.api.p_le_callback == NULL) {
BTM_TRACE_ERROR("%s can't access supported key size", __func__);
return 0;
}
callback_rc = (*btm_cb.api.p_le_callback)(
BTM_LE_IO_REQ_EVT, p_dev_rec->bd_addr, (tBTM_LE_EVT_DATA*)&dev_io_cfg);
if (callback_rc != BTM_SUCCESS) {
BTM_TRACE_ERROR("%s can't access supported key size", __func__);
return 0;
}
BTM_TRACE_DEBUG("%s device supports key size = %d", __func__,
dev_io_cfg.max_key_size);
return (dev_io_cfg.max_key_size);
#else
return 0;
#endif
}
/*******************************************************************************
* Utility functions for LE device IR/ER generation
******************************************************************************/
/*******************************************************************************
*
* Function btm_notify_new_key
*
* Description This function is to notify application new keys have been
* generated.
*
* Returns void
*
******************************************************************************/
static void btm_notify_new_key(uint8_t key_type) {
tBTM_BLE_LOCAL_KEYS* p_locak_keys = NULL;
BTM_TRACE_DEBUG("btm_notify_new_key key_type=%d", key_type);
if (btm_cb.api.p_le_key_callback) {
switch (key_type) {
case BTM_BLE_KEY_TYPE_ID:
BTM_TRACE_DEBUG("BTM_BLE_KEY_TYPE_ID");
p_locak_keys = (tBTM_BLE_LOCAL_KEYS*)&btm_cb.devcb.id_keys;
break;
case BTM_BLE_KEY_TYPE_ER:
BTM_TRACE_DEBUG("BTM_BLE_KEY_TYPE_ER");
p_locak_keys =
(tBTM_BLE_LOCAL_KEYS*)&btm_cb.devcb.ble_encryption_key_value;
break;
default:
BTM_TRACE_ERROR("unknown key type: %d", key_type);
break;
}
if (p_locak_keys != NULL)
(*btm_cb.api.p_le_key_callback)(key_type, p_locak_keys);
}
}
/*******************************************************************************
*
* Function btm_ble_process_irk
*
* Description This function is called when IRK is generated, store it in
* local control block.
*
* Returns void
*
******************************************************************************/
static void btm_ble_process_irk(tSMP_ENC* p) {
BTM_TRACE_DEBUG("btm_ble_process_irk");
if (p && p->opcode == HCI_BLE_ENCRYPT) {
memcpy(btm_cb.devcb.id_keys.irk, p->param_buf, BT_OCTET16_LEN);
btm_notify_new_key(BTM_BLE_KEY_TYPE_ID);
#if (BLE_PRIVACY_SPT == TRUE)
/* if privacy is enabled, new RPA should be calculated */
if (btm_cb.ble_ctr_cb.privacy_mode != BTM_PRIVACY_NONE) {
btm_gen_resolvable_private_addr(base::Bind(&btm_gen_resolve_paddr_low));
}
#endif
} else {
BTM_TRACE_ERROR("Generating IRK exception.");
}
/* proceed generate ER */
btsnd_hcic_ble_rand(base::Bind([](BT_OCTET8 rand1) {
memcpy(&btm_cb.devcb.ble_encryption_key_value[0], rand1, BT_OCTET8_LEN);
btsnd_hcic_ble_rand(base::Bind([](BT_OCTET8 rand2) {
memcpy(&btm_cb.devcb.ble_encryption_key_value[8], rand2, BT_OCTET8_LEN);
btm_notify_new_key(BTM_BLE_KEY_TYPE_ER);
}));
}));
}
/*******************************************************************************
*
* Function btm_ble_process_dhk
*
* Description This function is called when DHK is calculated, store it in
* local control block, and proceed to generate ER, a 128-bits
* random number.
*
* Returns void
*
******************************************************************************/
static void btm_ble_process_dhk(tSMP_ENC* p) {
uint8_t btm_ble_irk_pt = 0x01;
tSMP_ENC output;
BTM_TRACE_DEBUG("btm_ble_process_dhk");
if (p && p->opcode == HCI_BLE_ENCRYPT) {
memcpy(btm_cb.devcb.id_keys.dhk, p->param_buf, BT_OCTET16_LEN);
BTM_TRACE_DEBUG("BLE DHK generated.");
/* IRK = D1(IR, 1) */
if (!SMP_Encrypt(btm_cb.devcb.id_keys.ir, BT_OCTET16_LEN, &btm_ble_irk_pt,
1, &output)) {
/* reset all identity root related key */
memset(&btm_cb.devcb.id_keys, 0, sizeof(tBTM_BLE_LOCAL_ID_KEYS));
} else {
btm_ble_process_irk(&output);
}
} else {
/* reset all identity root related key */
memset(&btm_cb.devcb.id_keys, 0, sizeof(tBTM_BLE_LOCAL_ID_KEYS));
}
}
/*******************************************************************************
*
* Function btm_ble_reset_id
*
* Description This function is called to reset LE device identity.
*
* Returns void
*
******************************************************************************/
void btm_ble_reset_id(void) {
BTM_TRACE_DEBUG("btm_ble_reset_id");
/* Regenerate Identity Root*/
btsnd_hcic_ble_rand(base::Bind([](BT_OCTET8 rand) {
BTM_TRACE_DEBUG("btm_ble_process_ir1");
memcpy(btm_cb.devcb.id_keys.ir, rand, BT_OCTET8_LEN);
btsnd_hcic_ble_rand(base::Bind([](BT_OCTET8 rand) {
uint8_t btm_ble_dhk_pt = 0x03;
tSMP_ENC output;
BTM_TRACE_DEBUG("btm_ble_process_ir2");
/* remembering in control block */
memcpy(&btm_cb.devcb.id_keys.ir[8], rand, BT_OCTET8_LEN);
/* generate DHK= Eir({0x03, 0x00, 0x00 ...}) */
SMP_Encrypt(btm_cb.devcb.id_keys.ir, BT_OCTET16_LEN, &btm_ble_dhk_pt, 1,
&output);
btm_ble_process_dhk(&output);
BTM_TRACE_DEBUG("BLE IR generated.");
}));
}));
}
/* This function set a random address to local controller. It also temporarily
* disable scans and adv before sending the command to the controller. */
void btm_ble_set_random_address(BD_ADDR random_bda) {
tBTM_LE_RANDOM_CB* p_cb = &btm_cb.ble_ctr_cb.addr_mgnt_cb;
tBTM_BLE_CB* p_ble_cb = &btm_cb.ble_ctr_cb;
bool adv_mode = btm_cb.ble_ctr_cb.inq_var.adv_mode;
BTM_TRACE_DEBUG("%s", __func__);
if (btm_ble_get_conn_st() == BLE_DIR_CONN) {
BTM_TRACE_ERROR("%s: Cannot set random address. Direct conn ongoing",
__func__);
return;
}
if (adv_mode == BTM_BLE_ADV_ENABLE)
btsnd_hcic_ble_set_adv_enable(BTM_BLE_ADV_DISABLE);
if (BTM_BLE_IS_SCAN_ACTIVE(p_ble_cb->scan_activity)) btm_ble_stop_scan();
btm_ble_suspend_bg_conn();
memcpy(p_cb->private_addr, random_bda, BD_ADDR_LEN);
btsnd_hcic_ble_set_random_addr(p_cb->private_addr);
if (adv_mode == BTM_BLE_ADV_ENABLE)
btsnd_hcic_ble_set_adv_enable(BTM_BLE_ADV_ENABLE);
if (BTM_BLE_IS_SCAN_ACTIVE(p_ble_cb->scan_activity)) btm_ble_start_scan();
btm_ble_resume_bg_conn();
}
#if BTM_BLE_CONFORMANCE_TESTING == TRUE
/*******************************************************************************
*
* Function btm_ble_set_no_disc_if_pair_fail
*
* Description This function indicates whether no disconnect of the ACL
* should be used if pairing failed
*
* Returns void
*
******************************************************************************/
void btm_ble_set_no_disc_if_pair_fail(bool disable_disc) {
BTM_TRACE_DEBUG("btm_ble_set_disc_enable_if_pair_fail disable_disc=%d",
disable_disc);
btm_cb.devcb.no_disc_if_pair_fail = disable_disc;
}
/*******************************************************************************
*
* Function btm_ble_set_test_mac_value
*
* Description This function set test MAC value
*
* Returns void
*
******************************************************************************/
void btm_ble_set_test_mac_value(bool enable, uint8_t* p_test_mac_val) {
BTM_TRACE_DEBUG("btm_ble_set_test_mac_value enable=%d", enable);
btm_cb.devcb.enable_test_mac_val = enable;
memcpy(btm_cb.devcb.test_mac, p_test_mac_val, BT_OCTET8_LEN);
}
/*******************************************************************************
*
* Function btm_ble_set_test_local_sign_cntr_value
*
* Description This function set test local sign counter value
*
* Returns void
*
******************************************************************************/
void btm_ble_set_test_local_sign_cntr_value(bool enable,
uint32_t test_local_sign_cntr) {
BTM_TRACE_DEBUG(
"btm_ble_set_test_local_sign_cntr_value enable=%d local_sign_cntr=%d",
enable, test_local_sign_cntr);
btm_cb.devcb.enable_test_local_sign_cntr = enable;
btm_cb.devcb.test_local_sign_cntr = test_local_sign_cntr;
}
/*******************************************************************************
*
* Function btm_ble_set_keep_rfu_in_auth_req
*
* Description This function indicates if RFU bits have to be kept as is
* (by default they have to be set to 0 by the sender).
*
* Returns void
*
******************************************************************************/
void btm_ble_set_keep_rfu_in_auth_req(bool keep_rfu) {
BTM_TRACE_DEBUG("btm_ble_set_keep_rfu_in_auth_req keep_rfus=%d", keep_rfu);
btm_cb.devcb.keep_rfu_in_auth_req = keep_rfu;
}
#endif /* BTM_BLE_CONFORMANCE_TESTING */