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android / platform / packages / modules / Bluetooth / 25a7d9aaceea0f7d6cb4ae3da5aa66efb0bc7db8 / . / system / stack / btm / btm_sec.cc
blob: 92ede3616a9c624042f514e7d2799f628ae8f445 [file] [log] [blame]
/******************************************************************************
*
* Copyright 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 the Bluetooth Security Manager
*
******************************************************************************/
#define LOG_TAG "bt_btm_sec"
#include "stack/btm/btm_sec.h"
#include <base/logging.h>
#include <base/strings/stringprintf.h>
#include <frameworks/proto_logging/stats/enums/bluetooth/enums.pb.h>
#include <frameworks/proto_logging/stats/enums/bluetooth/hci/enums.pb.h>
#include <string.h>
#include "btif/include/btif_storage.h"
#include "common/metrics.h"
#include "common/time_util.h"
#include "device/include/controller.h"
#include "l2c_api.h"
#include "main/shim/btm_api.h"
#include "main/shim/dumpsys.h"
#include "main/shim/shim.h"
#include "osi/include/allocator.h"
#include "osi/include/compat.h"
#include "osi/include/log.h"
#include "osi/include/osi.h"
#include "stack/btm/btm_dev.h"
#include "stack/btm/security_device_record.h"
#include "stack/include/acl_api.h"
#include "stack/include/acl_hci_link_interface.h"
#include "stack/include/btm_status.h"
#include "stack/include/btu.h" // do_in_main_thread
#include "stack/include/l2cap_security_interface.h"
#include "stack/include/stack_metrics_logging.h"
#include "stack/smp/smp_int.h"
#include "types/raw_address.h"
namespace {
constexpr char kBtmLogTag[] = "SEC";
}
extern tBTM_CB btm_cb;
#define BTM_SEC_MAX_COLLISION_DELAY (5000)
#define BTM_SEC_IS_SM4(sm) ((bool)(BTM_SM4_TRUE == ((sm)&BTM_SM4_TRUE)))
#define BTM_SEC_IS_SM4_LEGACY(sm) ((bool)(BTM_SM4_KNOWN == ((sm)&BTM_SM4_TRUE)))
#define BTM_SEC_IS_SM4_UNKNOWN(sm) \
((bool)(BTM_SM4_UNKNOWN == ((sm)&BTM_SM4_TRUE)))
#define BTM_SEC_LE_MASK \
(BTM_SEC_LE_AUTHENTICATED | BTM_SEC_LE_ENCRYPTED | \
BTM_SEC_LE_LINK_KEY_KNOWN | BTM_SEC_LE_LINK_KEY_AUTHED)
void btm_inq_stop_on_ssp(void);
extern void btm_ble_advertiser_notify_terminated_legacy(
uint8_t status, uint16_t connection_handle);
extern bool btm_ble_init_pseudo_addr(tBTM_SEC_DEV_REC* p_dev_rec,
const RawAddress& new_pseudo_addr);
extern void bta_dm_remove_device(const RawAddress& bd_addr);
extern void bta_dm_process_remove_device(const RawAddress& bd_addr);
extern void btm_inq_clear_ssp(void);
extern void HACK_acl_check_sm4(tBTM_SEC_DEV_REC& p_dev_rec);
/*******************************************************************************
* L O C A L F U N C T I O N P R O T O T Y P E S *
******************************************************************************/
tBTM_SEC_SERV_REC* btm_sec_find_first_serv(bool is_originator, uint16_t psm);
static bool btm_sec_start_get_name(tBTM_SEC_DEV_REC* p_dev_rec);
static void btm_sec_wait_and_start_authentication(tBTM_SEC_DEV_REC* p_dev_rec);
static void btm_sec_auth_timer_timeout(void* data);
static void btm_sec_collision_timeout(void* data);
static void btm_restore_mode(void);
static void btm_sec_pairing_timeout(void* data);
static tBTM_STATUS btm_sec_dd_create_conn(tBTM_SEC_DEV_REC* p_dev_rec);
static void btm_sec_change_pairing_state(tBTM_PAIRING_STATE new_state);
static const char* btm_pair_state_descr(tBTM_PAIRING_STATE state);
static void btm_sec_check_pending_reqs(void);
static bool btm_sec_queue_mx_request(const RawAddress& bd_addr, uint16_t psm,
bool is_orig, uint16_t security_required,
tBTM_SEC_CALLBACK* p_callback,
void* p_ref_data);
static void btm_sec_bond_cancel_complete(void);
static void btm_send_link_key_notif(tBTM_SEC_DEV_REC* p_dev_rec);
static bool btm_sec_check_prefetch_pin(tBTM_SEC_DEV_REC* p_dev_rec);
static tBTM_STATUS btm_sec_send_hci_disconnect(tBTM_SEC_DEV_REC* p_dev_rec,
tHCI_STATUS reason,
uint16_t conn_handle,
std::string comment);
tBTM_SEC_DEV_REC* btm_sec_find_dev_by_sec_state(uint8_t state);
static bool btm_dev_authenticated(tBTM_SEC_DEV_REC* p_dev_rec);
static bool btm_dev_encrypted(tBTM_SEC_DEV_REC* p_dev_rec);
static uint16_t btm_sec_set_serv_level4_flags(uint16_t cur_security,
bool is_originator);
static bool btm_sec_queue_encrypt_request(const RawAddress& bd_addr,
tBT_TRANSPORT transport,
tBTM_SEC_CALLBACK* p_callback,
void* p_ref_data,
tBTM_BLE_SEC_ACT sec_act);
static void btm_sec_check_pending_enc_req(tBTM_SEC_DEV_REC* p_dev_rec,
tBT_TRANSPORT transport,
uint8_t encr_enable);
static bool btm_sec_use_smp_br_chnl(tBTM_SEC_DEV_REC* p_dev_rec);
/* true - authenticated link key is possible */
static const bool btm_sec_io_map[BTM_IO_CAP_MAX][BTM_IO_CAP_MAX] = {
/* OUT, IO, IN, NONE */
/* OUT */ {false, false, true, false},
/* IO */ {false, true, true, false},
/* IN */ {true, true, true, false},
/* NONE */ {false, false, false, false}};
/* BTM_IO_CAP_OUT 0 DisplayOnly */
/* BTM_IO_CAP_IO 1 DisplayYesNo */
/* BTM_IO_CAP_IN 2 KeyboardOnly */
/* BTM_IO_CAP_NONE 3 NoInputNoOutput */
static void NotifyBondingChange(tBTM_SEC_DEV_REC& p_dev_rec,
tHCI_STATUS status) {
if (btm_cb.api.p_auth_complete_callback != nullptr) {
(*btm_cb.api.p_auth_complete_callback)(
p_dev_rec.bd_addr, static_cast<uint8_t*>(p_dev_rec.dev_class),
p_dev_rec.sec_bd_name, status);
}
}
void NotifyBondingCanceled(tBTM_STATUS btm_status) {
if (btm_cb.api.p_bond_cancel_cmpl_callback) {
btm_cb.api.p_bond_cancel_cmpl_callback(BTM_SUCCESS);
}
}
/*******************************************************************************
*
* Function btm_dev_authenticated
*
* Description check device is authenticated
*
* Returns bool true or false
*
******************************************************************************/
static bool btm_dev_authenticated(tBTM_SEC_DEV_REC* p_dev_rec) {
if (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED) {
return (true);
}
return (false);
}
/*******************************************************************************
*
* Function btm_dev_encrypted
*
* Description check device is encrypted
*
* Returns bool true or false
*
******************************************************************************/
static bool btm_dev_encrypted(tBTM_SEC_DEV_REC* p_dev_rec) {
if (p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED) {
return (true);
}
return (false);
}
/*******************************************************************************
*
* Function btm_dev_16_digit_authenticated
*
* Description check device is authenticated by using 16 digit pin or MITM
*
* Returns bool true or false
*
******************************************************************************/
static bool btm_dev_16_digit_authenticated(tBTM_SEC_DEV_REC* p_dev_rec) {
// BTM_SEC_16_DIGIT_PIN_AUTHED is set if MITM or 16 digit pin is used
if (p_dev_rec->sec_flags & BTM_SEC_16_DIGIT_PIN_AUTHED) {
return (true);
}
return (false);
}
/*******************************************************************************
*
* Function access_secure_service_from_temp_bond
*
* Description a utility function to test whether an access to
* secure service from temp bonding is happening
*
* Returns true if the aforementioned condition holds,
* false otherwise
*
******************************************************************************/
static bool access_secure_service_from_temp_bond(const tBTM_SEC_DEV_REC* p_dev_rec,
bool locally_initiated,
uint16_t security_req) {
return !locally_initiated && (security_req & BTM_SEC_IN_AUTHENTICATE) &&
p_dev_rec->is_device_authenticated() &&
p_dev_rec->is_bond_type_temporary();
}
/*******************************************************************************
*
* Function BTM_SecRegister
*
* Description Application manager calls this function to register for
* security services. There can be one and only one
* application saving link keys. BTM allows only first
* registration.
*
* Returns true if registered OK, else false
*
******************************************************************************/
bool BTM_SecRegister(const tBTM_APPL_INFO* p_cb_info) {
if (bluetooth::shim::is_gd_shim_enabled()) {
return bluetooth::shim::BTM_SecRegister(p_cb_info);
}
BTM_TRACE_EVENT("%s application registered", __func__);
LOG_INFO("%s p_cb_info->p_le_callback == 0x%p", __func__,
p_cb_info->p_le_callback);
if (p_cb_info->p_le_callback) {
BTM_TRACE_EVENT("%s SMP_Register( btm_proc_smp_cback )", __func__);
SMP_Register(btm_proc_smp_cback);
Octet16 zero{0};
/* if no IR is loaded, need to regenerate all the keys */
if (btm_cb.devcb.id_keys.ir == zero) {
btm_ble_reset_id();
}
} else {
LOG_WARN("%s p_cb_info->p_le_callback == NULL", __func__);
}
btm_cb.api = *p_cb_info;
LOG_INFO("%s btm_cb.api.p_le_callback = 0x%p ", __func__,
btm_cb.api.p_le_callback);
BTM_TRACE_EVENT("%s application registered", __func__);
return (true);
}
/*******************************************************************************
*
* Function BTM_SecAddRmtNameNotifyCallback
*
* Description Any profile can register to be notified when name of the
* remote device is resolved.
*
* Returns true if registered OK, else false
*
******************************************************************************/
bool BTM_SecAddRmtNameNotifyCallback(tBTM_RMT_NAME_CALLBACK* p_callback) {
int i;
for (i = 0; i < BTM_SEC_MAX_RMT_NAME_CALLBACKS; i++) {
if (btm_cb.p_rmt_name_callback[i] == NULL) {
btm_cb.p_rmt_name_callback[i] = p_callback;
return (true);
}
}
return (false);
}
/*******************************************************************************
*
* Function BTM_SecDeleteRmtNameNotifyCallback
*
* Description Any profile can deregister notification when a new Link Key
* is generated per connection.
*
* Returns true if OK, else false
*
******************************************************************************/
bool BTM_SecDeleteRmtNameNotifyCallback(tBTM_RMT_NAME_CALLBACK* p_callback) {
int i;
for (i = 0; i < BTM_SEC_MAX_RMT_NAME_CALLBACKS; i++) {
if (btm_cb.p_rmt_name_callback[i] == p_callback) {
btm_cb.p_rmt_name_callback[i] = NULL;
return (true);
}
}
return (false);
}
bool BTM_IsEncrypted(const RawAddress& bd_addr, tBT_TRANSPORT transport) {
uint8_t flags = 0;
BTM_GetSecurityFlagsByTransport(bd_addr, &flags, transport);
return (flags & BTM_SEC_FLAG_ENCRYPTED) != 0;
}
bool BTM_IsLinkKeyAuthed(const RawAddress& bd_addr, tBT_TRANSPORT transport) {
uint8_t flags = 0;
BTM_GetSecurityFlagsByTransport(bd_addr, &flags, transport);
return (flags & BTM_SEC_FLAG_LKEY_AUTHED) != 0;
}
bool BTM_IsLinkKeyKnown(const RawAddress& bd_addr, tBT_TRANSPORT transport) {
uint8_t flags = 0;
BTM_GetSecurityFlagsByTransport(bd_addr, &flags, transport);
return (flags & BTM_SEC_FLAG_LKEY_KNOWN) != 0;
}
bool BTM_IsAuthenticated(const RawAddress& bd_addr, tBT_TRANSPORT transport) {
uint8_t flags = 0;
BTM_GetSecurityFlagsByTransport(bd_addr, &flags, transport);
return (flags & BTM_SEC_AUTHENTICATED) != 0;
}
/*******************************************************************************
*
* Function BTM_GetSecurityFlagsByTransport
*
* Description Get security flags for the device on a particular transport
*
* Returns bool true or false is device found
*
******************************************************************************/
bool BTM_GetSecurityFlagsByTransport(const RawAddress& bd_addr,
uint8_t* p_sec_flags,
tBT_TRANSPORT transport) {
tBTM_SEC_DEV_REC* p_dev_rec;
p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec != NULL) {
if (transport == BT_TRANSPORT_BR_EDR)
*p_sec_flags = (uint8_t)p_dev_rec->sec_flags;
else
*p_sec_flags = (uint8_t)(p_dev_rec->sec_flags >> 8);
return (true);
}
BTM_TRACE_ERROR("BTM_GetSecurityFlags false");
return (false);
}
/*******************************************************************************
*
* Function BTM_SetPinType
*
* Description Set PIN type for the device.
*
* Returns void
*
******************************************************************************/
void BTM_SetPinType(uint8_t pin_type, PIN_CODE pin_code, uint8_t pin_code_len) {
BTM_TRACE_API(
"BTM_SetPinType: pin type %d [variable-0, fixed-1], code %s, length %d",
pin_type, (char*)pin_code, pin_code_len);
/* If device is not up security mode will be set as a part of startup */
if ((btm_cb.cfg.pin_type != pin_type) &&
controller_get_interface()->get_is_ready()) {
btsnd_hcic_write_pin_type(pin_type);
}
btm_cb.cfg.pin_type = pin_type;
btm_cb.cfg.pin_code_len = pin_code_len;
memcpy(btm_cb.cfg.pin_code, pin_code, pin_code_len);
}
#define BTM_NO_AVAIL_SEC_SERVICES ((uint16_t)0xffff)
/*******************************************************************************
*
* Function BTM_SetSecurityLevel
*
* Description Register service security level with Security Manager
*
* Parameters: is_originator - true if originating the connection
* p_name - Name of the service relevant only if
* authorization will show this name to user.
* Ignored if BT_MAX_SERVICE_NAME_LEN is 0.
* service_id - service ID for the service passed to
* authorization callback
* sec_level - bit mask of the security features
* psm - L2CAP PSM
* mx_proto_id - protocol ID of multiplexing proto below
* mx_chan_id - channel ID of multiplexing proto below
*
* Returns true if registered OK, else false
*
******************************************************************************/
bool BTM_SetSecurityLevel(bool is_originator, const char* p_name,
uint8_t service_id, uint16_t sec_level, uint16_t psm,
uint32_t mx_proto_id, uint32_t mx_chan_id) {
tBTM_SEC_SERV_REC* p_srec;
uint16_t index;
uint16_t first_unused_record = BTM_NO_AVAIL_SEC_SERVICES;
bool record_allocated = false;
BTM_TRACE_API("%s : sec: 0x%x", __func__, sec_level);
/* See if the record can be reused (same service name, psm, mx_proto_id,
service_id, and mx_chan_id), or obtain the next unused record */
p_srec = &btm_cb.sec_serv_rec[0];
for (index = 0; index < BTM_SEC_MAX_SERVICE_RECORDS; index++, p_srec++) {
/* Check if there is already a record for this service */
if (p_srec->security_flags & BTM_SEC_IN_USE) {
if (p_srec->psm == psm && p_srec->mx_proto_id == mx_proto_id &&
service_id == p_srec->service_id && p_name &&
(!strncmp(p_name, (char*)p_srec->orig_service_name,
/* strlcpy replaces end char with termination char*/
BT_MAX_SERVICE_NAME_LEN - 1) ||
!strncmp(p_name, (char*)p_srec->term_service_name,
/* strlcpy replaces end char with termination char*/
BT_MAX_SERVICE_NAME_LEN - 1))) {
record_allocated = true;
break;
}
}
/* Mark the first available service record */
else if (!record_allocated) {
memset(p_srec, 0, sizeof(tBTM_SEC_SERV_REC));
record_allocated = true;
first_unused_record = index;
}
}
if (!record_allocated) {
BTM_TRACE_WARNING("BTM_SEC_REG: Out of Service Records (%d)",
BTM_SEC_MAX_SERVICE_RECORDS);
return (record_allocated);
}
/* Process the request if service record is valid */
/* If a duplicate service wasn't found, use the first available */
if (index >= BTM_SEC_MAX_SERVICE_RECORDS) {
index = first_unused_record;
p_srec = &btm_cb.sec_serv_rec[index];
}
p_srec->psm = psm;
p_srec->service_id = service_id;
p_srec->mx_proto_id = mx_proto_id;
if (is_originator) {
p_srec->orig_mx_chan_id = mx_chan_id;
strlcpy((char*)p_srec->orig_service_name, p_name,
BT_MAX_SERVICE_NAME_LEN + 1);
/* clear out the old setting, just in case it exists */
{
p_srec->security_flags &=
~(BTM_SEC_OUT_ENCRYPT | BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_MITM);
}
/* Parameter validation. Originator should not set requirements for
* incoming connections */
sec_level &= ~(BTM_SEC_IN_ENCRYPT | BTM_SEC_IN_AUTHENTICATE |
BTM_SEC_IN_MITM | BTM_SEC_IN_MIN_16_DIGIT_PIN);
if (btm_cb.security_mode == BTM_SEC_MODE_SP ||
btm_cb.security_mode == BTM_SEC_MODE_SC) {
if (sec_level & BTM_SEC_OUT_AUTHENTICATE) sec_level |= BTM_SEC_OUT_MITM;
}
/* Make sure the authenticate bit is set, when encrypt bit is set */
if (sec_level & BTM_SEC_OUT_ENCRYPT) sec_level |= BTM_SEC_OUT_AUTHENTICATE;
/* outgoing connections usually set the security level right before
* the connection is initiated.
* set it to be the outgoing service */
btm_cb.p_out_serv = p_srec;
} else {
p_srec->term_mx_chan_id = mx_chan_id;
strlcpy((char*)p_srec->term_service_name, p_name,
BT_MAX_SERVICE_NAME_LEN + 1);
/* clear out the old setting, just in case it exists */
{
p_srec->security_flags &=
~(BTM_SEC_IN_ENCRYPT | BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_MITM |
BTM_SEC_IN_MIN_16_DIGIT_PIN);
}
/* Parameter validation. Acceptor should not set requirements for outgoing
* connections */
sec_level &=
~(BTM_SEC_OUT_ENCRYPT | BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_MITM);
if (btm_cb.security_mode == BTM_SEC_MODE_SP ||
btm_cb.security_mode == BTM_SEC_MODE_SC) {
if (sec_level & BTM_SEC_IN_AUTHENTICATE) sec_level |= BTM_SEC_IN_MITM;
}
/* Make sure the authenticate bit is set, when encrypt bit is set */
if (sec_level & BTM_SEC_IN_ENCRYPT) sec_level |= BTM_SEC_IN_AUTHENTICATE;
}
p_srec->security_flags |= (uint16_t)(sec_level | BTM_SEC_IN_USE);
LOG_DEBUG(
"[%d]: id:%d, is_orig:%s psm:0x%04x proto_id:%d chan_id:%d"
" : sec:0x%x service_name:[%s] (up to %d chars saved)",
index, service_id, logbool(is_originator).c_str(), psm, mx_proto_id,
mx_chan_id, p_srec->security_flags, p_name, BT_MAX_SERVICE_NAME_LEN);
return (record_allocated);
}
/*******************************************************************************
*
* Function BTM_SecClrService
*
* Description Removes specified service record(s) from the security
* database. All service records with the specified name are
* removed. Typically used only by devices with limited RAM so
* that it can reuse an old security service record.
*
* Note: Unpredictable results may occur if a service is
* cleared that is still in use by an application/profile.
*
* Parameters Service ID - Id of the service to remove. '0' removes all
* service records (except SDP).
*
* Returns Number of records that were freed.
*
******************************************************************************/
uint8_t BTM_SecClrService(uint8_t service_id) {
tBTM_SEC_SERV_REC* p_srec = &btm_cb.sec_serv_rec[0];
uint8_t num_freed = 0;
int i;
for (i = 0; i < BTM_SEC_MAX_SERVICE_RECORDS; i++, p_srec++) {
/* Delete services with specified name (if in use and not SDP) */
if ((p_srec->security_flags & BTM_SEC_IN_USE) &&
(p_srec->psm != BT_PSM_SDP) &&
(!service_id || (service_id == p_srec->service_id))) {
BTM_TRACE_API("BTM_SEC_CLR[%d]: id %d", i, service_id);
p_srec->security_flags = 0;
num_freed++;
}
}
return (num_freed);
}
/*******************************************************************************
*
* Function BTM_SecClrServiceByPsm
*
* Description Removes specified service record from the security database.
* All service records with the specified psm are removed.
* Typically used by L2CAP to free up the service record used
* by dynamic PSM clients when the channel is closed.
* The given psm must be a virtual psm.
*
* Parameters Service ID - Id of the service to remove. '0' removes all
* service records (except SDP).
*
* Returns Number of records that were freed.
*
******************************************************************************/
uint8_t BTM_SecClrServiceByPsm(uint16_t psm) {
tBTM_SEC_SERV_REC* p_srec = &btm_cb.sec_serv_rec[0];
uint8_t num_freed = 0;
int i;
for (i = 0; i < BTM_SEC_MAX_SERVICE_RECORDS; i++, p_srec++) {
/* Delete services with specified name (if in use and not SDP) */
if ((p_srec->security_flags & BTM_SEC_IN_USE) && (p_srec->psm == psm)) {
BTM_TRACE_API("BTM_SEC_CLR[%d]: id %d ", i, p_srec->service_id);
p_srec->security_flags = 0;
num_freed++;
}
}
BTM_TRACE_API("BTM_SecClrServiceByPsm psm:0x%x num_freed:%d", psm, num_freed);
return (num_freed);
}
/*******************************************************************************
*
* Function BTM_PINCodeReply
*
* Description This function is called after Security Manager submitted
* PIN code request to the UI.
*
* Parameters: bd_addr - Address of the device for which PIN was
* requested
* res - result of the operation BTM_SUCCESS
* if success
* pin_len - length in bytes of the PIN Code
* p_pin - pointer to array with the PIN Code
*
******************************************************************************/
void BTM_PINCodeReply(const RawAddress& bd_addr, tBTM_STATUS res,
uint8_t pin_len, uint8_t* p_pin) {
tBTM_SEC_DEV_REC* p_dev_rec;
BTM_TRACE_API(
"BTM_PINCodeReply(): PairState: %s PairFlags: 0x%02x PinLen:%d "
"Result:%d",
btm_pair_state_descr(btm_cb.pairing_state), btm_cb.pairing_flags, pin_len,
res);
/* If timeout already expired or has been canceled, ignore the reply */
if (btm_cb.pairing_state != BTM_PAIR_STATE_WAIT_LOCAL_PIN) {
BTM_TRACE_WARNING("BTM_PINCodeReply() - Wrong State: %d",
btm_cb.pairing_state);
return;
}
if (bd_addr != btm_cb.pairing_bda) {
BTM_TRACE_ERROR("BTM_PINCodeReply() - Wrong BD Addr");
return;
}
p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec == NULL) {
BTM_TRACE_ERROR("BTM_PINCodeReply() - no dev CB");
return;
}
if ((pin_len > PIN_CODE_LEN) || (pin_len == 0) || (p_pin == NULL))
res = BTM_ILLEGAL_VALUE;
if (res != BTM_SUCCESS) {
/* if peer started dd OR we started dd and pre-fetch pin was not used send
* negative reply */
if ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_PEER_STARTED_DD) ||
((btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) &&
(btm_cb.pairing_flags & BTM_PAIR_FLAGS_DISC_WHEN_DONE))) {
/* use BTM_PAIR_STATE_WAIT_AUTH_COMPLETE to report authentication failed
* event */
btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
acl_set_disconnect_reason(HCI_ERR_HOST_REJECT_SECURITY);
btsnd_hcic_pin_code_neg_reply(bd_addr);
} else {
p_dev_rec->security_required = BTM_SEC_NONE;
btm_sec_change_pairing_state(BTM_PAIR_STATE_IDLE);
}
return;
}
p_dev_rec->sec_flags |= BTM_SEC_LINK_KEY_AUTHED;
p_dev_rec->pin_code_length = pin_len;
if (pin_len >= 16) {
p_dev_rec->sec_flags |= BTM_SEC_16_DIGIT_PIN_AUTHED;
}
if ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) &&
(p_dev_rec->hci_handle == HCI_INVALID_HANDLE) &&
(!btm_cb.security_mode_changed)) {
/* This is start of the dedicated bonding if local device is 2.0 */
btm_cb.pin_code_len = pin_len;
memcpy(btm_cb.pin_code, p_pin, pin_len);
btm_cb.security_mode_changed = true;
btsnd_hcic_write_auth_enable(true);
acl_set_disconnect_reason(HCI_ERR_UNDEFINED);
/* if we rejected incoming connection request, we have to wait
* HCI_Connection_Complete event */
/* before originating */
if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_REJECTED_CONNECT) {
BTM_TRACE_WARNING(
"BTM_PINCodeReply(): waiting HCI_Connection_Complete after rejected "
"incoming connection");
/* we change state little bit early so btm_sec_connected() will originate
* connection */
/* when existing ACL link is down completely */
btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_PIN_REQ);
}
/* if we already accepted incoming connection from pairing device */
else if (p_dev_rec->sm4 & BTM_SM4_CONN_PEND) {
BTM_TRACE_WARNING(
"BTM_PINCodeReply(): link is connecting so wait pin code request "
"from peer");
btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_PIN_REQ);
} else if (btm_sec_dd_create_conn(p_dev_rec) != BTM_CMD_STARTED) {
btm_sec_change_pairing_state(BTM_PAIR_STATE_IDLE);
p_dev_rec->sec_flags &= ~BTM_SEC_LINK_KEY_AUTHED;
NotifyBondingChange(*p_dev_rec, HCI_ERR_AUTH_FAILURE);
}
return;
}
btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
acl_set_disconnect_reason(HCI_SUCCESS);
btsnd_hcic_pin_code_req_reply(bd_addr, pin_len, p_pin);
}
/*******************************************************************************
*
* Function btm_sec_bond_by_transport
*
* Description this is the bond function that will start either SSP or SMP.
*
* Parameters: bd_addr - Address of the device to bond
* pin_len - length in bytes of the PIN Code
* p_pin - pointer to array with the PIN Code
*
* Note: After 2.1 parameters are not used and preserved here not to change API
******************************************************************************/
tBTM_STATUS btm_sec_bond_by_transport(const RawAddress& bd_addr,
tBLE_ADDR_TYPE addr_type,
tBT_TRANSPORT transport, uint8_t pin_len,
uint8_t* p_pin) {
tBTM_SEC_DEV_REC* p_dev_rec;
tBTM_STATUS status;
VLOG(1) << __func__ << " BDA: " << bd_addr;
BTM_TRACE_DEBUG("%s: Transport used %d, bd_addr=%s", __func__, transport,
bd_addr.ToString().c_str());
/* Other security process is in progress */
if (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) {
BTM_TRACE_ERROR("BTM_SecBond: already busy in state: %s",
btm_pair_state_descr(btm_cb.pairing_state));
return (BTM_WRONG_MODE);
}
p_dev_rec = btm_find_or_alloc_dev(bd_addr);
if (p_dev_rec == NULL) {
return (BTM_NO_RESOURCES);
}
if (!controller_get_interface()->get_is_ready()) {
BTM_TRACE_ERROR("%s controller module is not ready", __func__);
return (BTM_NO_RESOURCES);
}
BTM_TRACE_DEBUG("before update sec_flags=0x%x", p_dev_rec->sec_flags);
/* Finished if connection is active and already paired */
if (((p_dev_rec->hci_handle != HCI_INVALID_HANDLE) &&
transport == BT_TRANSPORT_BR_EDR &&
(p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED)) ||
((p_dev_rec->ble_hci_handle != HCI_INVALID_HANDLE) &&
transport == BT_TRANSPORT_LE &&
(p_dev_rec->sec_flags & BTM_SEC_LE_AUTHENTICATED))) {
BTM_TRACE_WARNING("BTM_SecBond -> Already Paired");
return (BTM_SUCCESS);
}
/* Tell controller to get rid of the link key if it has one stored */
if ((BTM_DeleteStoredLinkKey(&bd_addr, NULL)) != BTM_SUCCESS)
return (BTM_NO_RESOURCES);
/* Save the PIN code if we got a valid one */
if (p_pin && (pin_len <= PIN_CODE_LEN) && (pin_len != 0)) {
btm_cb.pin_code_len = pin_len;
p_dev_rec->pin_code_length = pin_len;
memcpy(btm_cb.pin_code, p_pin, PIN_CODE_LEN);
}
btm_cb.pairing_bda = bd_addr;
btm_cb.pairing_flags = BTM_PAIR_FLAGS_WE_STARTED_DD;
p_dev_rec->security_required = BTM_SEC_OUT_AUTHENTICATE;
p_dev_rec->is_originator = true;
BTM_LogHistory(kBtmLogTag, bd_addr, "Bonding initiated",
bt_transport_text(transport));
if (transport == BT_TRANSPORT_LE) {
btm_ble_init_pseudo_addr(p_dev_rec, bd_addr);
p_dev_rec->sec_flags &= ~BTM_SEC_LE_MASK;
if (SMP_Pair(bd_addr, addr_type) == SMP_STARTED) {
btm_cb.pairing_flags |= BTM_PAIR_FLAGS_LE_ACTIVE;
p_dev_rec->sec_state = BTM_SEC_STATE_AUTHENTICATING;
btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
return BTM_CMD_STARTED;
}
btm_cb.pairing_flags = 0;
return (BTM_NO_RESOURCES);
}
p_dev_rec->sec_flags &=
~(BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED |
BTM_SEC_ROLE_SWITCHED | BTM_SEC_LINK_KEY_AUTHED);
BTM_TRACE_DEBUG("after update sec_flags=0x%x", p_dev_rec->sec_flags);
if (!controller_get_interface()->supports_simple_pairing()) {
/* The special case when we authenticate keyboard. Set pin type to fixed */
/* It would be probably better to do it from the application, but it is */
/* complicated */
if (((p_dev_rec->dev_class[1] & BTM_COD_MAJOR_CLASS_MASK) ==
BTM_COD_MAJOR_PERIPHERAL) &&
(p_dev_rec->dev_class[2] & BTM_COD_MINOR_KEYBOARD) &&
(btm_cb.cfg.pin_type != HCI_PIN_TYPE_FIXED)) {
btm_cb.pin_type_changed = true;
btsnd_hcic_write_pin_type(HCI_PIN_TYPE_FIXED);
}
}
BTM_TRACE_EVENT("BTM_SecBond: Remote sm4: 0x%x HCI Handle: 0x%04x",
p_dev_rec->sm4, p_dev_rec->hci_handle);
#if (BTM_SEC_FORCE_RNR_FOR_DBOND == TRUE)
p_dev_rec->sec_flags &= ~BTM_SEC_NAME_KNOWN;
#endif
/* If connection already exists... */
if (BTM_IsAclConnectionUpAndHandleValid(bd_addr, transport)) {
btm_sec_wait_and_start_authentication(p_dev_rec);
btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_PIN_REQ);
/* Mark lcb as bonding */
l2cu_update_lcb_4_bonding(bd_addr, true);
return (BTM_CMD_STARTED);
}
BTM_TRACE_DEBUG("sec mode: %d sm4:x%x", btm_cb.security_mode, p_dev_rec->sm4);
if (!controller_get_interface()->supports_simple_pairing() ||
(p_dev_rec->sm4 == BTM_SM4_KNOWN)) {
if (btm_sec_check_prefetch_pin(p_dev_rec)) return (BTM_CMD_STARTED);
}
if ((btm_cb.security_mode == BTM_SEC_MODE_SP ||
btm_cb.security_mode == BTM_SEC_MODE_SC) &&
BTM_SEC_IS_SM4_UNKNOWN(p_dev_rec->sm4)) {
/* local is 2.1 and peer is unknown */
if ((p_dev_rec->sm4 & BTM_SM4_CONN_PEND) == 0) {
/* we are not accepting connection request from peer
* -> RNR (to learn if peer is 2.1)
* RNR when no ACL causes HCI_RMT_HOST_SUP_FEAT_NOTIFY_EVT */
btm_sec_change_pairing_state(BTM_PAIR_STATE_GET_REM_NAME);
status = BTM_ReadRemoteDeviceName(bd_addr, NULL, BT_TRANSPORT_BR_EDR);
} else {
/* We are accepting connection request from peer */
btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_PIN_REQ);
status = BTM_CMD_STARTED;
}
BTM_TRACE_DEBUG("State:%s sm4: 0x%x sec_state:%d",
btm_pair_state_descr(btm_cb.pairing_state), p_dev_rec->sm4,
p_dev_rec->sec_state);
} else {
/* both local and peer are 2.1 */
status = btm_sec_dd_create_conn(p_dev_rec);
}
if (status != BTM_CMD_STARTED) {
BTM_TRACE_ERROR(
"%s BTM_ReadRemoteDeviceName or btm_sec_dd_create_conn error: 0x%x",
__func__, (int)status);
btm_sec_change_pairing_state(BTM_PAIR_STATE_IDLE);
}
return status;
}
/*******************************************************************************
*
* Function BTM_SecBond
*
* Description This function is called to perform bonding with peer device.
* If the connection is already up, but not secure, pairing
* is attempted. If already paired BTM_SUCCESS is returned.
*
* Parameters: bd_addr - Address of the device to bond
* transport - doing SSP over BR/EDR or SMP over LE
* pin_len - length in bytes of the PIN Code
* p_pin - pointer to array with the PIN Code
*
* Note: After 2.1 parameters are not used and preserved here not to change API
******************************************************************************/
tBTM_STATUS BTM_SecBond(const RawAddress& bd_addr, tBLE_ADDR_TYPE addr_type,
tBT_TRANSPORT transport, tBT_DEVICE_TYPE device_type,
uint8_t pin_len, uint8_t* p_pin) {
if (bluetooth::shim::is_gd_shim_enabled()) {
return bluetooth::shim::BTM_SecBond(bd_addr, addr_type, transport,
device_type);
}
if (transport == BT_TRANSPORT_AUTO) {
if (addr_type == BLE_ADDR_PUBLIC) {
transport =
BTM_UseLeLink(bd_addr) ? BT_TRANSPORT_LE : BT_TRANSPORT_BR_EDR;
} else {
LOG_INFO("Forcing transport LE (was auto) because of the address type");
transport = BT_TRANSPORT_LE;
}
}
tBT_DEVICE_TYPE dev_type;
BTM_ReadDevInfo(bd_addr, &dev_type, &addr_type);
/* LE device, do SMP pairing */
if ((transport == BT_TRANSPORT_LE && (dev_type & BT_DEVICE_TYPE_BLE) == 0) ||
(transport == BT_TRANSPORT_BR_EDR &&
(dev_type & BT_DEVICE_TYPE_BREDR) == 0)) {
return BTM_ILLEGAL_ACTION;
}
return btm_sec_bond_by_transport(bd_addr, addr_type, transport, pin_len,
p_pin);
}
/*******************************************************************************
*
* Function BTM_SecBondCancel
*
* Description This function is called to cancel ongoing bonding process
* with peer device.
*
* Parameters: bd_addr - Address of the peer device
* transport - false for BR/EDR link; true for LE link
*
******************************************************************************/
tBTM_STATUS BTM_SecBondCancel(const RawAddress& bd_addr) {
if (bluetooth::shim::is_gd_shim_enabled()) {
return bluetooth::shim::BTM_SecBondCancel(bd_addr);
}
tBTM_SEC_DEV_REC* p_dev_rec;
BTM_TRACE_API("BTM_SecBondCancel() State: %s flags:0x%x",
btm_pair_state_descr(btm_cb.pairing_state),
btm_cb.pairing_flags);
p_dev_rec = btm_find_dev(bd_addr);
if (!p_dev_rec || btm_cb.pairing_bda != bd_addr) {
return BTM_UNKNOWN_ADDR;
}
if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_LE_ACTIVE) {
if (p_dev_rec->sec_state == BTM_SEC_STATE_AUTHENTICATING) {
BTM_TRACE_DEBUG("Cancel LE pairing");
if (SMP_PairCancel(bd_addr)) {
return BTM_CMD_STARTED;
}
}
return BTM_WRONG_MODE;
}
BTM_TRACE_DEBUG("hci_handle:0x%x sec_state:%d", p_dev_rec->hci_handle,
p_dev_rec->sec_state);
if (BTM_PAIR_STATE_WAIT_LOCAL_PIN == btm_cb.pairing_state &&
BTM_PAIR_FLAGS_WE_STARTED_DD & btm_cb.pairing_flags) {
/* pre-fetching pin for dedicated bonding */
btm_sec_bond_cancel_complete();
return BTM_SUCCESS;
}
/* If this BDA is in a bonding procedure */
if ((btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) &&
(btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)) {
/* If the HCI link is up */
if (p_dev_rec->hci_handle != HCI_INVALID_HANDLE) {
/* If some other thread disconnecting, we do not send second command */
if ((p_dev_rec->sec_state == BTM_SEC_STATE_DISCONNECTING) ||
(p_dev_rec->sec_state == BTM_SEC_STATE_DISCONNECTING_BOTH))
return (BTM_CMD_STARTED);
/* If the HCI link was set up by Bonding process */
if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_DISC_WHEN_DONE)
return btm_sec_send_hci_disconnect(
p_dev_rec, HCI_ERR_PEER_USER, p_dev_rec->hci_handle,
"stack::btm::btm_sec::BTM_SecBondCancel");
else
l2cu_update_lcb_4_bonding(bd_addr, false);
return BTM_NOT_AUTHORIZED;
} else /*HCI link is not up */
{
/* If the HCI link creation was started by Bonding process */
if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_DISC_WHEN_DONE) {
btsnd_hcic_create_conn_cancel(bd_addr);
return BTM_CMD_STARTED;
}
if (btm_cb.pairing_state == BTM_PAIR_STATE_GET_REM_NAME) {
BTM_CancelRemoteDeviceName();
btm_cb.pairing_flags |= BTM_PAIR_FLAGS_WE_CANCEL_DD;
return BTM_CMD_STARTED;
}
return BTM_NOT_AUTHORIZED;
}
}
return BTM_WRONG_MODE;
}
/*******************************************************************************
*
* Function BTM_SecGetDeviceLinkKeyType
*
* Description This function is called to obtain link key type for the
* device.
* it returns BTM_SUCCESS if link key is available, or
* BTM_UNKNOWN_ADDR if Security Manager does not know about
* the device or device record does not contain link key info
*
* Returns BTM_LKEY_TYPE_IGNORE if link key is unknown, link type
* otherwise.
*
******************************************************************************/
tBTM_LINK_KEY_TYPE BTM_SecGetDeviceLinkKeyType(const RawAddress& bd_addr) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
if ((p_dev_rec != NULL) && (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN)) {
return p_dev_rec->link_key_type;
}
return BTM_LKEY_TYPE_IGNORE;
}
/*******************************************************************************
*
* Function BTM_SetEncryption
*
* Description This function is called to ensure that 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.
*
* Parameters: bd_addr - Address of the peer device
* transport - Link transport
* p_callback - Pointer to callback function called if
* this function returns PENDING after required
* procedures are completed. Can be set to
* NULL if status is not desired.
* p_ref_data - pointer to any data the caller wishes to
* receive in the callback function upon
* completion. can be set to NULL if not used.
* sec_act - LE security action, unused for BR/EDR
*
* Returns BTM_SUCCESS - already encrypted
* BTM_PENDING - command will be returned in the callback
* BTM_WRONG_MODE- connection not up.
* BTM_BUSY - security procedures are currently active
* BTM_MODE_UNSUPPORTED - if security manager not linked in.
*
******************************************************************************/
tBTM_STATUS BTM_SetEncryption(const RawAddress& bd_addr,
tBT_TRANSPORT transport,
tBTM_SEC_CALLBACK* p_callback, void* p_ref_data,
tBTM_BLE_SEC_ACT sec_act) {
if (bluetooth::shim::is_gd_shim_enabled()) {
return bluetooth::shim::BTM_SetEncryption(bd_addr, transport, p_callback,
p_ref_data, sec_act);
}
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec == nullptr) {
LOG_ERROR("Unable to set encryption for unknown device");
return BTM_WRONG_MODE;
}
switch (transport) {
case BT_TRANSPORT_BR_EDR:
if (p_dev_rec->hci_handle == HCI_INVALID_HANDLE) {
LOG_WARN(
"Security Manager: BTM_SetEncryption not connected peer:%s "
"transport:%s",
PRIVATE_ADDRESS(bd_addr), bt_transport_text(transport).c_str());
if (p_callback)
(*p_callback)(&bd_addr, transport, p_ref_data, BTM_WRONG_MODE);
return BTM_WRONG_MODE;
}
if (p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED) {
LOG_DEBUG(
"Security Manager: BTM_SetEncryption already encrypted peer:%s "
"transport:%s",
PRIVATE_ADDRESS(bd_addr), bt_transport_text(transport).c_str());
if (*p_callback)
(*p_callback)(&bd_addr, transport, p_ref_data, BTM_SUCCESS);
return BTM_SUCCESS;
}
break;
case BT_TRANSPORT_LE:
if (p_dev_rec->ble_hci_handle == HCI_INVALID_HANDLE) {
LOG_WARN(
"Security Manager: BTM_SetEncryption not connected peer:%s "
"transport:%s",
PRIVATE_ADDRESS(bd_addr), bt_transport_text(transport).c_str());
if (p_callback)
(*p_callback)(&bd_addr, transport, p_ref_data, BTM_WRONG_MODE);
return BTM_WRONG_MODE;
}
if (p_dev_rec->sec_flags & BTM_SEC_LE_ENCRYPTED) {
LOG_DEBUG(
"Security Manager: BTM_SetEncryption already encrypted peer:%s "
"transport:%s",
PRIVATE_ADDRESS(bd_addr), bt_transport_text(transport).c_str());
if (*p_callback)
(*p_callback)(&bd_addr, transport, p_ref_data, BTM_SUCCESS);
return BTM_SUCCESS;
}
break;
default:
LOG_ERROR("Unknown transport");
break;
}
/* enqueue security request if security is active */
if (p_dev_rec->p_callback || (p_dev_rec->sec_state != BTM_SEC_STATE_IDLE)) {
LOG_WARN("Security Manager: BTM_SetEncryption busy, enqueue request");
if (btm_sec_queue_encrypt_request(bd_addr, transport, p_callback,
p_ref_data, sec_act)) {
LOG_INFO("Queued start encryption");
return BTM_CMD_STARTED;
} else {
LOG_WARN("Unable to enqueue start encryption request");
if (p_callback)
(*p_callback)(&bd_addr, transport, p_ref_data, BTM_NO_RESOURCES);
return BTM_NO_RESOURCES;
}
}
p_dev_rec->p_callback = p_callback;
p_dev_rec->p_ref_data = p_ref_data;
p_dev_rec->security_required |=
(BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_ENCRYPT);
p_dev_rec->is_originator = false;
LOG_DEBUG(
"Security Manager: BTM_SetEncryption classic_handle:0x%04x "
"ble_handle:0x%04x state:%d flags:0x%x "
"required:0x%x p_callback=%c",
p_dev_rec->hci_handle, p_dev_rec->ble_hci_handle, p_dev_rec->sec_state,
p_dev_rec->sec_flags, p_dev_rec->security_required,
(p_callback) ? 'T' : 'F');
tBTM_STATUS rc = BTM_SUCCESS;
switch (transport) {
case BT_TRANSPORT_LE:
if (BTM_IsAclConnectionUp(bd_addr, BT_TRANSPORT_LE)) {
rc = btm_ble_set_encryption(bd_addr, sec_act,
L2CA_GetBleConnRole(bd_addr));
} else {
rc = BTM_WRONG_MODE;
LOG_WARN("cannot call btm_ble_set_encryption, p is NULL");
}
break;
case BT_TRANSPORT_BR_EDR:
rc = btm_sec_execute_procedure(p_dev_rec);
break;
default:
LOG_ERROR("Unknown transport");
break;
}
switch (rc) {
case BTM_CMD_STARTED:
case BTM_BUSY:
break;
default:
if (p_callback) {
LOG_DEBUG("Executing encryption callback peer:%s transport:%s",
PRIVATE_ADDRESS(bd_addr),
bt_transport_text(transport).c_str());
p_dev_rec->p_callback = nullptr;
(*p_callback)(&bd_addr, transport, p_dev_rec->p_ref_data, rc);
}
break;
}
return rc;
}
bool BTM_SecIsSecurityPending(const RawAddress& bd_addr) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
return p_dev_rec && (p_dev_rec->sec_state == BTM_SEC_STATE_ENCRYPTING ||
p_dev_rec->sec_state == BTM_SEC_STATE_AUTHENTICATING);
}
/*******************************************************************************
* disconnect the ACL link, if it's not done yet.
******************************************************************************/
static tBTM_STATUS btm_sec_send_hci_disconnect(tBTM_SEC_DEV_REC* p_dev_rec,
tHCI_STATUS reason,
uint16_t conn_handle,
std::string comment) {
const tSECURITY_STATE old_state =
static_cast<tSECURITY_STATE>(p_dev_rec->sec_state);
const tBTM_STATUS status = BTM_CMD_STARTED;
/* send HCI_Disconnect on a transport only once */
switch (old_state) {
case BTM_SEC_STATE_DISCONNECTING:
if (conn_handle == p_dev_rec->hci_handle) {
// Already sent classic disconnect
return status;
}
// Prepare to send disconnect on le transport
p_dev_rec->sec_state = BTM_SEC_STATE_DISCONNECTING_BOTH;
break;
case BTM_SEC_STATE_DISCONNECTING_BLE:
if (conn_handle == p_dev_rec->ble_hci_handle) {
// Already sent ble disconnect
return status;
}
// Prepare to send disconnect on classic transport
p_dev_rec->sec_state = BTM_SEC_STATE_DISCONNECTING_BOTH;
break;
case BTM_SEC_STATE_DISCONNECTING_BOTH:
// Already sent disconnect on both transports
return status;
default:
p_dev_rec->sec_state = (conn_handle == p_dev_rec->hci_handle)
? BTM_SEC_STATE_DISCONNECTING
: BTM_SEC_STATE_DISCONNECTING_BLE;
break;
}
LOG_DEBUG("Send hci disconnect handle:0x%04x reason:%s", conn_handle,
hci_reason_code_text(reason).c_str());
acl_disconnect_after_role_switch(conn_handle, reason, comment);
return status;
}
/*******************************************************************************
*
* Function BTM_ConfirmReqReply
*
* Description This function is called to confirm the numeric value for
* Simple Pairing in response to BTM_SP_CFM_REQ_EVT
*
* Parameters: res - result of the operation BTM_SUCCESS if
* success
* bd_addr - Address of the peer device
*
******************************************************************************/
void BTM_ConfirmReqReply(tBTM_STATUS res, const RawAddress& bd_addr) {
ASSERT_LOG(!bluetooth::shim::is_gd_shim_enabled(), "Unreachable code path");
BTM_TRACE_EVENT("BTM_ConfirmReqReply() State: %s Res: %u",
btm_pair_state_descr(btm_cb.pairing_state), res);
/* If timeout already expired or has been canceled, ignore the reply */
if ((btm_cb.pairing_state != BTM_PAIR_STATE_WAIT_NUMERIC_CONFIRM) ||
(btm_cb.pairing_bda != bd_addr))
return;
btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
if ((res == BTM_SUCCESS) || (res == BTM_SUCCESS_NO_SECURITY)) {
acl_set_disconnect_reason(HCI_SUCCESS);
btsnd_hcic_user_conf_reply(bd_addr, true);
} else {
/* Report authentication failed event from state
* BTM_PAIR_STATE_WAIT_AUTH_COMPLETE */
acl_set_disconnect_reason(HCI_ERR_HOST_REJECT_SECURITY);
btsnd_hcic_user_conf_reply(bd_addr, false);
}
}
/*******************************************************************************
*
* Function BTM_PasskeyReqReply
*
* Description This function is called to provide the passkey for
* Simple Pairing in response to BTM_SP_KEY_REQ_EVT
*
* Parameters: res - result of the operation BTM_SUCCESS if success
* bd_addr - Address of the peer device
* passkey - numeric value in the range of
* BTM_MIN_PASSKEY_VAL(0) -
* BTM_MAX_PASSKEY_VAL(999999(0xF423F)).
*
******************************************************************************/
void BTM_PasskeyReqReply(tBTM_STATUS res, const RawAddress& bd_addr,
uint32_t passkey) {
ASSERT_LOG(!bluetooth::shim::is_gd_shim_enabled(), "Unreachable code path");
BTM_TRACE_API("BTM_PasskeyReqReply: State: %s res:%d",
btm_pair_state_descr(btm_cb.pairing_state), res);
if ((btm_cb.pairing_state == BTM_PAIR_STATE_IDLE) ||
(btm_cb.pairing_bda != bd_addr)) {
return;
}
/* If timeout already expired or has been canceled, ignore the reply */
if ((btm_cb.pairing_state == BTM_PAIR_STATE_WAIT_AUTH_COMPLETE) &&
(res != BTM_SUCCESS)) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec != NULL) {
acl_set_disconnect_reason(HCI_ERR_HOST_REJECT_SECURITY);
if (p_dev_rec->hci_handle != HCI_INVALID_HANDLE)
btm_sec_send_hci_disconnect(
p_dev_rec, HCI_ERR_AUTH_FAILURE, p_dev_rec->hci_handle,
"stack::btm::btm_sec::BTM_PasskeyReqReply Invalid handle");
else
BTM_SecBondCancel(bd_addr);
p_dev_rec->sec_flags &=
~(BTM_SEC_LINK_KEY_AUTHED | BTM_SEC_LINK_KEY_KNOWN);
btm_sec_change_pairing_state(BTM_PAIR_STATE_IDLE);
return;
}
} else if (btm_cb.pairing_state != BTM_PAIR_STATE_KEY_ENTRY)
return;
if (passkey > BTM_MAX_PASSKEY_VAL) res = BTM_ILLEGAL_VALUE;
btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
if (res != BTM_SUCCESS) {
/* use BTM_PAIR_STATE_WAIT_AUTH_COMPLETE to report authentication failed
* event */
acl_set_disconnect_reason(HCI_ERR_HOST_REJECT_SECURITY);
btsnd_hcic_user_passkey_neg_reply(bd_addr);
} else {
acl_set_disconnect_reason(HCI_SUCCESS);
btsnd_hcic_user_passkey_reply(bd_addr, passkey);
}
}
/*******************************************************************************
*
* Function BTM_ReadLocalOobData
*
* Description This function is called to read the local OOB data from
* LM
*
******************************************************************************/
void BTM_ReadLocalOobData(void) { btsnd_hcic_read_local_oob_data(); }
/*******************************************************************************
*
* Function BTM_RemoteOobDataReply
*
* Description This function is called to provide the remote OOB data for
* Simple Pairing in response to BTM_SP_RMT_OOB_EVT
*
* Parameters: bd_addr - Address of the peer device
* c - simple pairing Hash C.
* r - simple pairing Randomizer C.
*
******************************************************************************/
void BTM_RemoteOobDataReply(tBTM_STATUS res, const RawAddress& bd_addr,
const Octet16& c, const Octet16& r) {
BTM_TRACE_EVENT("%s() - State: %s res: %d", __func__,
btm_pair_state_descr(btm_cb.pairing_state), res);
/* If timeout already expired or has been canceled, ignore the reply */
if (btm_cb.pairing_state != BTM_PAIR_STATE_WAIT_LOCAL_OOB_RSP) return;
btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
if (res != BTM_SUCCESS) {
/* use BTM_PAIR_STATE_WAIT_AUTH_COMPLETE to report authentication failed
* event */
acl_set_disconnect_reason(HCI_ERR_HOST_REJECT_SECURITY);
btsnd_hcic_rem_oob_neg_reply(bd_addr);
} else {
acl_set_disconnect_reason(HCI_SUCCESS);
btsnd_hcic_rem_oob_reply(bd_addr, c, r);
}
}
/*******************************************************************************
*
* Function BTM_BothEndsSupportSecureConnections
*
* Description This function is called to check if both the local device
* and the peer device specified by bd_addr support BR/EDR
* Secure Connections.
*
* Parameters: bd_addr - address of the peer
*
* Returns true if BR/EDR Secure Connections are supported by both
* local and the remote device, else false.
*
******************************************************************************/
bool BTM_BothEndsSupportSecureConnections(const RawAddress& bd_addr) {
return ((controller_get_interface()->supports_secure_connections()) &&
(BTM_PeerSupportsSecureConnections(bd_addr)));
}
/*******************************************************************************
*
* Function BTM_PeerSupportsSecureConnections
*
* Description This function is called to check if the peer supports
* BR/EDR Secure Connections.
*
* Parameters: bd_addr - address of the peer
*
* Returns true if BR/EDR Secure Connections are supported by the peer,
* else false.
*
******************************************************************************/
bool BTM_PeerSupportsSecureConnections(const RawAddress& bd_addr) {
tBTM_SEC_DEV_REC* p_dev_rec;
p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec == NULL) {
LOG(WARNING) << __func__ << ": unknown BDA: " << bd_addr;
return false;
}
return (p_dev_rec->SupportsSecureConnections());
}
/*******************************************************************************
*
* Function BTM_GetPeerDeviceTypeFromFeatures
*
* Description This function is called to retrieve the peer device type
* by referencing the remote features.
*
* Parameters: bd_addr - address of the peer
*
* Returns BT_DEVICE_TYPE_DUMO if both BR/EDR and BLE transports are
* supported by the peer,
* BT_DEVICE_TYPE_BREDR if only BR/EDR transport is supported,
* BT_DEVICE_TYPE_BLE if only BLE transport is supported.
*
******************************************************************************/
tBT_DEVICE_TYPE BTM_GetPeerDeviceTypeFromFeatures(const RawAddress& bd_addr) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec == nullptr) {
LOG_WARN("Unknown BDA:%s", PRIVATE_ADDRESS(bd_addr));
} else {
if (p_dev_rec->remote_supports_ble && p_dev_rec->remote_supports_bredr) {
return BT_DEVICE_TYPE_DUMO;
} else if (p_dev_rec->remote_supports_bredr) {
return BT_DEVICE_TYPE_BREDR;
} else if (p_dev_rec->remote_supports_ble) {
return BT_DEVICE_TYPE_BLE;
} else {
LOG_WARN("Device features does not support BR/EDR and BLE:%s",
PRIVATE_ADDRESS(bd_addr));
}
}
return BT_DEVICE_TYPE_BREDR;
}
/************************************************************************
* I N T E R N A L F U N C T I O N S
************************************************************************/
/*******************************************************************************
*
* Function btm_sec_is_upgrade_possible
*
* Description This function returns true if the existing link key
* can be upgraded or if the link key does not exist.
*
* Returns bool
*
******************************************************************************/
static bool btm_sec_is_upgrade_possible(tBTM_SEC_DEV_REC* p_dev_rec,
bool is_originator) {
uint16_t mtm_check = is_originator ? BTM_SEC_OUT_MITM : BTM_SEC_IN_MITM;
bool is_possible = true;
if (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN) {
is_possible = false;
/* Already have a link key to the connected peer. Is the link key secure
*enough?
** Is a link key upgrade even possible?
*/
if ((p_dev_rec->security_required & mtm_check) /* needs MITM */
&& ((p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB) ||
(p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB_P_256))
/* has unauthenticated
link key */
&& (p_dev_rec->rmt_io_caps < BTM_IO_CAP_MAX) /* a valid peer IO cap */
&& (btm_sec_io_map[p_dev_rec->rmt_io_caps][btm_cb.devcb.loc_io_caps]))
/* authenticated
link key is possible */
{
/* upgrade is possible: check if the application wants the upgrade.
* If the application is configured to use a global MITM flag,
* it probably would not want to upgrade the link key based on the
* security level database */
is_possible = true;
}
}
BTM_TRACE_DEBUG("%s() is_possible: %d sec_flags: 0x%x", __func__, is_possible,
p_dev_rec->sec_flags);
return is_possible;
}
/*******************************************************************************
*
* Function btm_sec_check_upgrade
*
* Description This function is called to check if the existing link key
* needs to be upgraded.
*
* Returns void
*
******************************************************************************/
static void btm_sec_check_upgrade(tBTM_SEC_DEV_REC* p_dev_rec,
bool is_originator) {
BTM_TRACE_DEBUG("%s()", __func__);
/* Only check if link key already exists */
if (!(p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN)) return;
if (btm_sec_is_upgrade_possible(p_dev_rec, is_originator)) {
BTM_TRACE_DEBUG("need upgrade!! sec_flags:0x%x", p_dev_rec->sec_flags);
/* if the application confirms the upgrade, set the upgrade bit */
p_dev_rec->sm4 |= BTM_SM4_UPGRADE;
/* Clear the link key known to go through authentication/pairing again */
p_dev_rec->sec_flags &= ~(BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LINK_KEY_AUTHED);
p_dev_rec->sec_flags &= ~BTM_SEC_AUTHENTICATED;
BTM_TRACE_DEBUG("sec_flags:0x%x", p_dev_rec->sec_flags);
}
}
tBTM_STATUS btm_sec_l2cap_access_req_by_requirement(
const RawAddress& bd_addr, uint16_t security_required, bool is_originator,
tBTM_SEC_CALLBACK* p_callback, void* p_ref_data) {
LOG_DEBUG(
"Checking l2cap access requirements peer:%s security:0x%x "
"is_initiator:%s",
PRIVATE_ADDRESS(bd_addr), security_required,
logbool(is_originator).c_str());
tBTM_STATUS rc = BTM_SUCCESS;
bool chk_acp_auth_done = false;
/* should check PSM range in LE connection oriented L2CAP connection */
constexpr tBT_TRANSPORT transport = BT_TRANSPORT_BR_EDR;
/* Find or get oldest record */
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_or_alloc_dev(bd_addr);
p_dev_rec->hci_handle = BTM_GetHCIConnHandle(bd_addr, BT_TRANSPORT_BR_EDR);
if ((!is_originator) && (security_required & BTM_SEC_MODE4_LEVEL4)) {
bool local_supports_sc =
controller_get_interface()->supports_secure_connections();
/* acceptor receives L2CAP Channel Connect Request for Secure Connections
* Only service */
if (!local_supports_sc || !p_dev_rec->SupportsSecureConnections()) {
LOG_WARN(
"Policy requires mode 4 level 4, but local_support_for_sc=%d, "
"rmt_support_for_sc=%s, failing connection",
local_supports_sc,
logbool(p_dev_rec->SupportsSecureConnections()).c_str());
if (p_callback) {
(*p_callback)(&bd_addr, transport, (void*)p_ref_data,
BTM_MODE4_LEVEL4_NOT_SUPPORTED);
}
return (BTM_MODE4_LEVEL4_NOT_SUPPORTED);
}
}
/* there are some devices (moto KRZR) which connects to several services at
* the same time */
/* we will process one after another */
if ((p_dev_rec->p_callback) ||
(btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)) {
LOG_DEBUG("security_flags:x%x, sec_flags:x%x", security_required,
p_dev_rec->sec_flags);
rc = BTM_CMD_STARTED;
if ((btm_cb.security_mode == BTM_SEC_MODE_SERVICE) ||
(BTM_SM4_KNOWN == p_dev_rec->sm4) ||
(BTM_SEC_IS_SM4(p_dev_rec->sm4) &&
(!btm_sec_is_upgrade_possible(p_dev_rec, is_originator)))) {
/* legacy mode - local is legacy or local is lisbon/peer is legacy
* or SM4 with no possibility of link key upgrade */
if (is_originator) {
if (((security_required & BTM_SEC_OUT_FLAGS) == 0) ||
((((security_required & BTM_SEC_OUT_FLAGS) ==
BTM_SEC_OUT_AUTHENTICATE) &&
btm_dev_authenticated(p_dev_rec))) ||
((((security_required & BTM_SEC_OUT_FLAGS) ==
(BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_ENCRYPT)) &&
btm_dev_encrypted(p_dev_rec)))) {
rc = BTM_SUCCESS;
}
} else {
if (((security_required & BTM_SEC_IN_FLAGS) == 0) ||
(((security_required & BTM_SEC_IN_FLAGS) ==
BTM_SEC_IN_AUTHENTICATE) &&
btm_dev_authenticated(p_dev_rec)) ||
(((security_required & BTM_SEC_IN_FLAGS) ==
(BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_ENCRYPT)) &&
btm_dev_encrypted(p_dev_rec))) {
// Check for 16 digits (or MITM)
if (((security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN) == 0) ||
(((security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN) ==
BTM_SEC_IN_MIN_16_DIGIT_PIN) &&
btm_dev_16_digit_authenticated(p_dev_rec))) {
rc = BTM_SUCCESS;
}
}
}
if ((rc == BTM_SUCCESS) && (security_required & BTM_SEC_MODE4_LEVEL4) &&
(p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256)) {
rc = BTM_CMD_STARTED;
}
if (rc == BTM_SUCCESS) {
if (access_secure_service_from_temp_bond(p_dev_rec, is_originator, security_required)) {
LOG_ERROR("Trying to access a secure service from a temp bonding, rejecting");
rc = BTM_FAILED_ON_SECURITY;
}
if (p_callback)
(*p_callback)(&bd_addr, transport, (void*)p_ref_data, rc);
return (rc);
}
}
btm_cb.sec_req_pending = true;
return (BTM_CMD_STARTED);
}
/* Save the security requirements in case a pairing is needed */
p_dev_rec->required_security_flags_for_pairing = security_required;
/* Modify security_required in btm_sec_l2cap_access_req for Lisbon */
if (btm_cb.security_mode == BTM_SEC_MODE_SP ||
btm_cb.security_mode == BTM_SEC_MODE_SC) {
if (BTM_SEC_IS_SM4(p_dev_rec->sm4)) {
if (is_originator) {
/* SM4 to SM4 -> always authenticate & encrypt */
security_required |= (BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_ENCRYPT);
} else /* acceptor */
{
/* SM4 to SM4: the acceptor needs to make sure the authentication is
* already done */
chk_acp_auth_done = true;
/* SM4 to SM4 -> always authenticate & encrypt */
security_required |= (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_ENCRYPT);
}
} else if (!(BTM_SM4_KNOWN & p_dev_rec->sm4)) {
/* the remote features are not known yet */
LOG_DEBUG(
"Remote features have not yet been received sec_flags:0x%02x %s",
p_dev_rec->sec_flags, (is_originator) ? "initiator" : "acceptor");
p_dev_rec->sm4 |= BTM_SM4_REQ_PEND;
return (BTM_CMD_STARTED);
}
}
BTM_TRACE_DEBUG(
"%s() sm4:0x%x, sec_flags:0x%x, security_required:0x%x chk:%d", __func__,
p_dev_rec->sm4, p_dev_rec->sec_flags, security_required,
chk_acp_auth_done);
p_dev_rec->security_required = security_required;
p_dev_rec->p_ref_data = p_ref_data;
p_dev_rec->is_originator = is_originator;
if (chk_acp_auth_done) {
BTM_TRACE_DEBUG(
"(SM4 to SM4) btm_sec_l2cap_access_req rspd. authenticated: x%x, enc: "
"x%x",
(p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED),
(p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED));
/* SM4, but we do not know for sure which level of security we need.
* as long as we have a link key, it's OK */
if ((0 == (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED)) ||
(0 == (p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED))) {
rc = BTM_DELAY_CHECK;
/*
2046 may report HCI_Encryption_Change and L2C Connection Request out of
sequence
because of data path issues. Delay this disconnect a little bit
*/
LOG_INFO(
"%s peer should have initiated security process by now (SM4 to SM4)",
__func__);
p_dev_rec->p_callback = p_callback;
p_dev_rec->sec_state = BTM_SEC_STATE_DELAY_FOR_ENC;
(*p_callback)(&bd_addr, transport, p_ref_data, rc);
return BTM_SUCCESS;
}
}
p_dev_rec->p_callback = p_callback;
if (BTM_SEC_IS_SM4(p_dev_rec->sm4)) {
if ((p_dev_rec->security_required & BTM_SEC_MODE4_LEVEL4) &&
(p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256)) {
/* BTM_LKEY_TYPE_AUTH_COMB_P_256 is the only acceptable key in this case
*/
if ((p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN) != 0) {
p_dev_rec->sm4 |= BTM_SM4_UPGRADE;
}
p_dev_rec->sec_flags &=
~(BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LINK_KEY_AUTHED |
BTM_SEC_AUTHENTICATED);
BTM_TRACE_DEBUG("%s: sec_flags:0x%x", __func__, p_dev_rec->sec_flags);
} else {
/* If we already have a link key to the connected peer, is it secure
* enough? */
btm_sec_check_upgrade(p_dev_rec, is_originator);
}
}
rc = btm_sec_execute_procedure(p_dev_rec);
if (rc != BTM_CMD_STARTED) {
BTM_TRACE_DEBUG("%s: p_dev_rec=%p, clearing callback. old p_callback=%p",
__func__, p_dev_rec, p_dev_rec->p_callback);
p_dev_rec->p_callback = NULL;
(*p_callback)(&bd_addr, transport, p_dev_rec->p_ref_data, rc);
}
return (rc);
}
/*******************************************************************************
*
* Function btm_sec_l2cap_access_req
*
* Description This function is called by the L2CAP to grant permission to
* establish L2CAP connection to or from the peer device.
*
* Parameters: bd_addr - Address of the peer device
* psm - L2CAP PSM
* is_originator - true if protocol above L2CAP originates
* connection
* p_callback - Pointer to callback function called if
* this function returns PENDING after required
* procedures are complete. MUST NOT BE NULL.
*
* Returns tBTM_STATUS
*
******************************************************************************/
tBTM_STATUS btm_sec_l2cap_access_req(const RawAddress& bd_addr, uint16_t psm,
bool is_originator,
tBTM_SEC_CALLBACK* p_callback,
void* p_ref_data) {
// should check PSM range in LE connection oriented L2CAP connection
constexpr tBT_TRANSPORT transport = BT_TRANSPORT_BR_EDR;
LOG_DEBUG("is_originator:%d, psm=0x%04x", is_originator, psm);
// 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) {
LOG_WARN("PSM: 0x%04x no application registered", psm);
(*p_callback)(&bd_addr, transport, p_ref_data, BTM_MODE_UNSUPPORTED);
return (BTM_MODE_UNSUPPORTED);
}
/* Services level0 by default have no security */
if (psm == BT_PSM_SDP) {
LOG_DEBUG("No security required for SDP");
(*p_callback)(&bd_addr, transport, p_ref_data, BTM_SUCCESS_NO_SECURITY);
return (BTM_SUCCESS);
}
uint16_t security_required;
if (btm_cb.security_mode == BTM_SEC_MODE_SC) {
security_required = btm_sec_set_serv_level4_flags(
p_serv_rec->security_flags, is_originator);
} else {
security_required = p_serv_rec->security_flags;
}
return btm_sec_l2cap_access_req_by_requirement(
bd_addr, security_required, is_originator, p_callback, p_ref_data);
}
/*******************************************************************************
*
* Function btm_sec_mx_access_request
*
* Description This function is called by all Multiplexing Protocols during
* establishing connection to or from peer device to grant
* permission to establish application connection.
*
* Parameters: bd_addr - Address of the peer device
* psm - L2CAP PSM
* is_originator - true if protocol above L2CAP originates
* connection
* mx_proto_id - protocol ID of the multiplexer
* mx_chan_id - multiplexer channel to reach application
* p_callback - Pointer to callback function called if
* this function returns PENDING after required
* procedures are completed
* p_ref_data - Pointer to any reference data needed by the
* the callback function.
*
* Returns BTM_CMD_STARTED
*
******************************************************************************/
tBTM_STATUS btm_sec_mx_access_request(const RawAddress& bd_addr,
bool is_originator,
uint16_t security_required,
tBTM_SEC_CALLBACK* p_callback,
void* p_ref_data) {
tBTM_SEC_DEV_REC* p_dev_rec;
tBTM_STATUS rc;
bool transport = false; /* should check PSM range in LE connection oriented
L2CAP connection */
if (bluetooth::shim::is_gd_shim_enabled()) {
return bluetooth::shim::btm_sec_mx_access_request(
bd_addr, is_originator, security_required, p_callback, p_ref_data);
}
LOG_DEBUG("Multiplex access request device:%s", PRIVATE_ADDRESS(bd_addr));
/* Find or get oldest record */
p_dev_rec = btm_find_or_alloc_dev(bd_addr);
/* there are some devices (moto phone) which connects to several services at
* the same time */
/* we will process one after another */
if ((p_dev_rec->p_callback) ||
(btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)) {
LOG_DEBUG("Pairing in progress pairing_state:%s",
btm_pair_state_descr(btm_cb.pairing_state));
rc = BTM_CMD_STARTED;
if ((btm_cb.security_mode == BTM_SEC_MODE_SERVICE) ||
(BTM_SM4_KNOWN == p_dev_rec->sm4) ||
(BTM_SEC_IS_SM4(p_dev_rec->sm4) &&
(!btm_sec_is_upgrade_possible(p_dev_rec, is_originator)))) {
/* legacy mode - local is legacy or local is lisbon/peer is legacy
* or SM4 with no possibility of link key upgrade */
if (is_originator) {
if (((security_required & BTM_SEC_OUT_FLAGS) == 0) ||
((((security_required & BTM_SEC_OUT_FLAGS) ==
BTM_SEC_OUT_AUTHENTICATE) &&
btm_dev_authenticated(p_dev_rec))) ||
((((security_required & BTM_SEC_OUT_FLAGS) ==
(BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_ENCRYPT)) &&
btm_dev_encrypted(p_dev_rec)))) {
rc = BTM_SUCCESS;
}
} else {
if (((security_required & BTM_SEC_IN_FLAGS) == 0) ||
((((security_required & BTM_SEC_IN_FLAGS) ==
BTM_SEC_IN_AUTHENTICATE) &&
btm_dev_authenticated(p_dev_rec))) ||
((((security_required & BTM_SEC_IN_FLAGS) ==
(BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_ENCRYPT)) &&
btm_dev_encrypted(p_dev_rec)))) {
// Check for 16 digits (or MITM)
if (((security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN) == 0) ||
(((security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN) ==
BTM_SEC_IN_MIN_16_DIGIT_PIN) &&
btm_dev_16_digit_authenticated(p_dev_rec))) {
rc = BTM_SUCCESS;
}
}
}
if ((rc == BTM_SUCCESS) && (security_required & BTM_SEC_MODE4_LEVEL4) &&
(p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256)) {
rc = BTM_CMD_STARTED;
}
}
/* the new security request */
if (p_dev_rec->sec_state != BTM_SEC_STATE_IDLE) {
LOG_DEBUG("A pending security procedure in progress");
rc = BTM_CMD_STARTED;
}
if (rc == BTM_CMD_STARTED) {
btm_sec_queue_mx_request(bd_addr, BT_PSM_RFCOMM, is_originator,
security_required, p_callback, p_ref_data);
} else /* rc == BTM_SUCCESS */
{
if (p_callback) {
LOG_DEBUG("Notifying client that security access has been granted");
(*p_callback)(&bd_addr, transport, p_ref_data, rc);
}
}
return rc;
}
if ((!is_originator) && ((security_required & BTM_SEC_MODE4_LEVEL4) ||
(btm_cb.security_mode == BTM_SEC_MODE_SC))) {
bool local_supports_sc =
controller_get_interface()->supports_secure_connections();
/* acceptor receives service connection establishment Request for */
/* Secure Connections Only service */
if (!(local_supports_sc) || !(p_dev_rec->SupportsSecureConnections())) {
LOG_DEBUG(
"Secure Connection only mode unsupported local_SC_support:%s"
" remote_SC_support:%s",
logbool(local_supports_sc).c_str(),
logbool(p_dev_rec->SupportsSecureConnections()).c_str());
if (p_callback)
(*p_callback)(&bd_addr, transport, (void*)p_ref_data,
BTM_MODE4_LEVEL4_NOT_SUPPORTED);
return (BTM_MODE4_LEVEL4_NOT_SUPPORTED);
}
}
if (security_required & BTM_SEC_OUT_AUTHENTICATE) {
security_required |= BTM_SEC_OUT_MITM;
}
if (security_required & BTM_SEC_IN_AUTHENTICATE) {
security_required |= BTM_SEC_IN_MITM;
}
p_dev_rec->required_security_flags_for_pairing = security_required;
p_dev_rec->security_required = security_required;
if (btm_cb.security_mode == BTM_SEC_MODE_SP ||
btm_cb.security_mode == BTM_SEC_MODE_SC) {
if (BTM_SEC_IS_SM4(p_dev_rec->sm4)) {
if ((p_dev_rec->security_required & BTM_SEC_MODE4_LEVEL4) &&
(p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256)) {
/* BTM_LKEY_TYPE_AUTH_COMB_P_256 is the only acceptable key in this case
*/
if ((p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN) != 0) {
p_dev_rec->sm4 |= BTM_SM4_UPGRADE;
}
p_dev_rec->sec_flags &=
~(BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LINK_KEY_AUTHED |
BTM_SEC_AUTHENTICATED);
BTM_TRACE_DEBUG("%s: sec_flags:0x%x", __func__, p_dev_rec->sec_flags);
} else {
LOG_DEBUG("Already have link key; checking if link key is sufficient");
btm_sec_check_upgrade(p_dev_rec, is_originator);
}
}
}
p_dev_rec->is_originator = is_originator;
p_dev_rec->p_callback = p_callback;
p_dev_rec->p_ref_data = p_ref_data;
rc = btm_sec_execute_procedure(p_dev_rec);
LOG_DEBUG("Started security procedure peer:%s btm_status:%s",
PRIVATE_ADDRESS(p_dev_rec->RemoteAddress()),
btm_status_text(rc).c_str());
if (rc != BTM_CMD_STARTED) {
if (p_callback) {
p_dev_rec->p_callback = NULL;
(*p_callback)(&bd_addr, transport, p_ref_data, rc);
}
}
return rc;
}
/*******************************************************************************
*
* Function btm_sec_conn_req
*
* Description This function is when the peer device is requesting
* connection
*
* Returns void
*
******************************************************************************/
void btm_sec_conn_req(const RawAddress& bda, uint8_t* dc) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bda);
/* Some device may request a connection before we are done with the HCI_Reset
* sequence */
if (!controller_get_interface()->get_is_ready()) {
BTM_TRACE_EVENT("Security Manager: connect request when device not ready");
btsnd_hcic_reject_conn(bda, HCI_ERR_HOST_REJECT_DEVICE);
return;
}
if ((btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) &&
(btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) &&
(btm_cb.pairing_bda == bda)) {
BTM_TRACE_EVENT(
"Security Manager: reject connect request from bonding device");
/* incoming connection from bonding device is rejected */
btm_cb.pairing_flags |= BTM_PAIR_FLAGS_REJECTED_CONNECT;
btsnd_hcic_reject_conn(bda, HCI_ERR_HOST_REJECT_DEVICE);
return;
}
/* Host is not interested or approved connection. Save BDA and DC and */
/* pass request to L2CAP */
btm_cb.connecting_bda = bda;
memcpy(btm_cb.connecting_dc, dc, DEV_CLASS_LEN);
if (!p_dev_rec) {
/* accept the connection -> allocate a device record */
p_dev_rec = btm_sec_alloc_dev(bda);
}
p_dev_rec->sm4 |= BTM_SM4_CONN_PEND;
}
/*******************************************************************************
*
* Function btm_sec_bond_cancel_complete
*
* Description This function is called to report bond cancel complete
* event.
*
* Returns void
*
******************************************************************************/
static void btm_sec_bond_cancel_complete(void) {
tBTM_SEC_DEV_REC* p_dev_rec;
if ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_DISC_WHEN_DONE) ||
(BTM_PAIR_STATE_WAIT_LOCAL_PIN == btm_cb.pairing_state &&
BTM_PAIR_FLAGS_WE_STARTED_DD & btm_cb.pairing_flags) ||
(btm_cb.pairing_state == BTM_PAIR_STATE_GET_REM_NAME &&
BTM_PAIR_FLAGS_WE_CANCEL_DD & btm_cb.pairing_flags)) {
/* for dedicated bonding in legacy mode, authentication happens at "link
* level"
* btm_sec_connected is called with failed status.
* In theory, the code that handles is_pairing_device/true should clean out
* security related code.
* However, this function may clean out the security related flags and
* btm_sec_connected would not know
* this function also needs to do proper clean up.
*/
p_dev_rec = btm_find_dev(btm_cb.pairing_bda);
if (p_dev_rec != NULL) p_dev_rec->security_required = BTM_SEC_NONE;
btm_sec_change_pairing_state(BTM_PAIR_STATE_IDLE);
/* Notify application that the cancel succeeded */
if (btm_cb.api.p_bond_cancel_cmpl_callback)
btm_cb.api.p_bond_cancel_cmpl_callback(BTM_SUCCESS);
}
}
/*******************************************************************************
*
* Function btm_create_conn_cancel_complete
*
* Description This function is called when the command complete message
* is received from the HCI for the create connection cancel
* command.
*
* Returns void
*
******************************************************************************/
void btm_create_conn_cancel_complete(const uint8_t* p) {
uint8_t status;
STREAM_TO_UINT8(status, p);
RawAddress bd_addr;
STREAM_TO_BDADDR(bd_addr, p);
BTM_TRACE_EVENT("btm_create_conn_cancel_complete(): in State: %s status:%d",
btm_pair_state_descr(btm_cb.pairing_state), status);
log_link_layer_connection_event(
&bd_addr, bluetooth::common::kUnknownConnectionHandle,
android::bluetooth::DIRECTION_OUTGOING, android::bluetooth::LINK_TYPE_ACL,
android::bluetooth::hci::CMD_CREATE_CONNECTION_CANCEL,
android::bluetooth::hci::EVT_COMMAND_COMPLETE,
android::bluetooth::hci::BLE_EVT_UNKNOWN, status,
android::bluetooth::hci::STATUS_UNKNOWN);
/* if the create conn cancel cmd was issued by the bond cancel,
** the application needs to be notified that bond cancel succeeded
*/
switch (status) {
case HCI_SUCCESS:
btm_sec_bond_cancel_complete();
break;
case HCI_ERR_CONNECTION_EXISTS:
case HCI_ERR_NO_CONNECTION:
default:
/* Notify application of the error */
if (btm_cb.api.p_bond_cancel_cmpl_callback)
btm_cb.api.p_bond_cancel_cmpl_callback(BTM_ERR_PROCESSING);
break;
}
}
/*******************************************************************************
*
* Function btm_sec_check_pending_reqs
*
* Description This function is called at the end of the security procedure
* to let L2CAP and RFCOMM know to re-submit any pending
* requests
*
* Returns void
*
******************************************************************************/
void btm_sec_check_pending_reqs(void) {
if (btm_cb.pairing_state == BTM_PAIR_STATE_IDLE) {
/* First, resubmit L2CAP requests */
if (btm_cb.sec_req_pending) {
btm_cb.sec_req_pending = false;
l2cu_resubmit_pending_sec_req(nullptr);
}
/* Now, re-submit anything in the mux queue */
fixed_queue_t* bq = btm_cb.sec_pending_q;
btm_cb.sec_pending_q = fixed_queue_new(SIZE_MAX);
tBTM_SEC_QUEUE_ENTRY* p_e;
while ((p_e = (tBTM_SEC_QUEUE_ENTRY*)fixed_queue_try_dequeue(bq)) != NULL) {
/* Check that the ACL is still up before starting security procedures */
if (BTM_IsAclConnectionUp(p_e->bd_addr, p_e->transport)) {
if (p_e->psm != 0) {
BTM_TRACE_EVENT("%s PSM:0x%04x Is_Orig:%u", __func__, p_e->psm,
p_e->is_orig);
btm_sec_mx_access_request(p_e->bd_addr, p_e->is_orig,
p_e->rfcomm_security_requirement,
p_e->p_callback, p_e->p_ref_data);
} else {
BTM_SetEncryption(p_e->bd_addr, p_e->transport, p_e->p_callback,
p_e->p_ref_data, p_e->sec_act);
}
}
osi_free(p_e);
}
fixed_queue_free(bq, NULL);
}
}
/*******************************************************************************
*
* Function btm_sec_dev_reset
*
* Description This function should be called after device reset
*
* Returns void
*
******************************************************************************/
void btm_sec_dev_reset(void) {
if (controller_get_interface()->supports_simple_pairing()) {
/* set the default IO capabilities */
btm_cb.devcb.loc_io_caps = btif_storage_get_local_io_caps();
/* add mx service to use no security */
BTM_SetSecurityLevel(false, "RFC_MUX", BTM_SEC_SERVICE_RFC_MUX,
BTM_SEC_NONE, BT_PSM_RFCOMM, BTM_SEC_PROTO_RFCOMM, 0);
BTM_SetSecurityLevel(true, "RFC_MUX", BTM_SEC_SERVICE_RFC_MUX, BTM_SEC_NONE,
BT_PSM_RFCOMM, BTM_SEC_PROTO_RFCOMM, 0);
} else {
btm_cb.security_mode = BTM_SEC_MODE_SERVICE;
}
BTM_TRACE_DEBUG("btm_sec_dev_reset sec mode: %d", btm_cb.security_mode);
}
/*******************************************************************************
*
* Function btm_sec_abort_access_req
*
* Description This function is called by the L2CAP or RFCOMM to abort
* the pending operation.
*
* Parameters: bd_addr - Address of the peer device
*
* Returns void
*
******************************************************************************/
void btm_sec_abort_access_req(const RawAddress& bd_addr) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
if (!p_dev_rec) return;
if ((p_dev_rec->sec_state != BTM_SEC_STATE_AUTHORIZING) &&
(p_dev_rec->sec_state != BTM_SEC_STATE_AUTHENTICATING))
return;
p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;
BTM_TRACE_DEBUG("%s: clearing callback. p_dev_rec=%p, p_callback=%p",
__func__, p_dev_rec, p_dev_rec->p_callback);
p_dev_rec->p_callback = NULL;
}
/*******************************************************************************
*
* Function btm_sec_dd_create_conn
*
* Description This function is called to create the ACL connection for
* the dedicated boding process
*
* Returns void
*
******************************************************************************/
static tBTM_STATUS btm_sec_dd_create_conn(tBTM_SEC_DEV_REC* p_dev_rec) {
tBTM_STATUS status = l2cu_ConnectAclForSecurity(p_dev_rec->bd_addr);
if (status == BTM_CMD_STARTED) {
btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_PIN_REQ);
return BTM_CMD_STARTED;
} else if (status == BTM_NO_RESOURCES) {
return BTM_NO_RESOURCES;
}
/* set up the control block to indicated dedicated bonding */
btm_cb.pairing_flags |= BTM_PAIR_FLAGS_DISC_WHEN_DONE;
VLOG(1) << "Security Manager: " << p_dev_rec->bd_addr;
btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_PIN_REQ);
return (BTM_CMD_STARTED);
}
bool is_state_getting_name(void* data, void* context) {
tBTM_SEC_DEV_REC* p_dev_rec = static_cast<tBTM_SEC_DEV_REC*>(data);
if (p_dev_rec->sec_state == BTM_SEC_STATE_GETTING_NAME) {
return false;
}
return true;
}
/*******************************************************************************
*
* Function btm_sec_rmt_name_request_complete
*
* Description This function is called when remote name was obtained from
* the peer device
*
* Returns void
*
******************************************************************************/
void btm_sec_rmt_name_request_complete(const RawAddress* p_bd_addr,
const uint8_t* p_bd_name,
tHCI_STATUS status) {
tBTM_SEC_DEV_REC* p_dev_rec = nullptr;
int i;
uint8_t old_sec_state;
if ((!p_bd_addr &&
!BTM_IsAclConnectionUp(btm_cb.connecting_bda, BT_TRANSPORT_BR_EDR)) ||
(p_bd_addr && !BTM_IsAclConnectionUp(*p_bd_addr, BT_TRANSPORT_BR_EDR))) {
LOG_WARN("Remote read request complete with no underlying link connection");
btm_acl_resubmit_page();
}
/* If remote name request failed, p_bd_addr is null and we need to search */
/* based on state assuming that we are doing 1 at a time */
if (p_bd_addr)
p_dev_rec = btm_find_dev(*p_bd_addr);
else {
LOG_INFO(
"Remote read request complete with no address so searching device "
"database");
list_node_t* node =
list_foreach(btm_cb.sec_dev_rec, is_state_getting_name, NULL);
if (node != NULL) {
p_dev_rec = static_cast<tBTM_SEC_DEV_REC*>(list_node(node));
p_bd_addr = &p_dev_rec->bd_addr;
}
}
if (!p_bd_name) p_bd_name = (const uint8_t*)"";
if (p_dev_rec != nullptr) {
old_sec_state = p_dev_rec->sec_state;
if (status == HCI_SUCCESS) {
LOG_DEBUG(
"Remote read request complete for known device pairing_state:%s "
"name:%s sec_state:%s",
btm_pair_state_descr(btm_cb.pairing_state), p_bd_name,
security_state_text(p_dev_rec->sec_state).c_str());
strlcpy((char*)p_dev_rec->sec_bd_name, (const char*)p_bd_name,
BTM_MAX_REM_BD_NAME_LEN + 1);
p_dev_rec->sec_flags |= BTM_SEC_NAME_KNOWN;
BTM_TRACE_EVENT("setting BTM_SEC_NAME_KNOWN sec_flags:0x%x",
p_dev_rec->sec_flags);
} else {
LOG_WARN(
"Remote read request failed for known device pairing_state:%s "
"status:%s name:%s sec_state:%s",
btm_pair_state_descr(btm_cb.pairing_state),
hci_status_code_text(status).c_str(), p_bd_name,
security_state_text(p_dev_rec->sec_state).c_str());
/* Notify all clients waiting for name to be resolved even if it failed so
* clients can continue */
p_dev_rec->sec_bd_name[0] = 0;
}
if (p_dev_rec->sec_state == BTM_SEC_STATE_GETTING_NAME)
p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;
/* Notify all clients waiting for name to be resolved */
for (i = 0; i < BTM_SEC_MAX_RMT_NAME_CALLBACKS; i++) {
if (btm_cb.p_rmt_name_callback[i] && p_bd_addr)
(*btm_cb.p_rmt_name_callback[i])(*p_bd_addr, p_dev_rec->dev_class,
p_dev_rec->sec_bd_name);
}
} else {
LOG_DEBUG(
"Remote read request complete for unknown device pairing_state:%s "
"status:%s name:%s",
btm_pair_state_descr(btm_cb.pairing_state),
hci_status_code_text(status).c_str(), p_bd_name);
/* Notify all clients waiting for name to be resolved even if not found so
* clients can continue */
for (i = 0; i < BTM_SEC_MAX_RMT_NAME_CALLBACKS; i++) {
if (btm_cb.p_rmt_name_callback[i] && p_bd_addr)
(*btm_cb.p_rmt_name_callback[i])(*p_bd_addr, (uint8_t*)kDevClassEmpty,
(uint8_t*)kBtmBdNameEmpty);
}
return;
}
/* If we were delaying asking UI for a PIN because name was not resolved, ask
* now */
if ((btm_cb.pairing_state == BTM_PAIR_STATE_WAIT_LOCAL_PIN) && p_bd_addr &&
(btm_cb.pairing_bda == *p_bd_addr)) {
BTM_TRACE_EVENT(
"%s() delayed pin now being requested flags:0x%x, "
"(p_pin_callback=0x%p)",
__func__, btm_cb.pairing_flags, btm_cb.api.p_pin_callback);
if ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_PIN_REQD) == 0 &&
btm_cb.api.p_pin_callback) {
BTM_TRACE_EVENT("%s() calling pin_callback", __func__);
btm_cb.pairing_flags |= BTM_PAIR_FLAGS_PIN_REQD;
(*btm_cb.api.p_pin_callback)(
p_dev_rec->bd_addr, p_dev_rec->dev_class, p_bd_name,
(p_dev_rec->required_security_flags_for_pairing &
BTM_SEC_IN_MIN_16_DIGIT_PIN));
}
/* Set the same state again to force the timer to be restarted */
btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_LOCAL_PIN);
return;
}
/* Check if we were delaying bonding because name was not resolved */
if (btm_cb.pairing_state == BTM_PAIR_STATE_GET_REM_NAME) {
if (p_bd_addr && btm_cb.pairing_bda == *p_bd_addr) {
BTM_TRACE_EVENT("%s() continue bonding sm4: 0x%04x, status:0x%x",
__func__, p_dev_rec->sm4, status);
if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_CANCEL_DD) {
btm_sec_bond_cancel_complete();
return;
}
if (status != HCI_SUCCESS) {
btm_sec_change_pairing_state(BTM_PAIR_STATE_IDLE);
return NotifyBondingChange(*p_dev_rec, status);
}
/* if peer is very old legacy devices, HCI_RMT_HOST_SUP_FEAT_NOTIFY_EVT is
* not reported */
if (BTM_SEC_IS_SM4_UNKNOWN(p_dev_rec->sm4)) {
/* set the KNOWN flag only if BTM_PAIR_FLAGS_REJECTED_CONNECT is not
* set.*/
/* If it is set, there may be a race condition */
BTM_TRACE_DEBUG("%s IS_SM4_UNKNOWN Flags:0x%04x", __func__,
btm_cb.pairing_flags);
if ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_REJECTED_CONNECT) == 0)
p_dev_rec->sm4 |= BTM_SM4_KNOWN;
}
BTM_TRACE_DEBUG("%s, SM4 Value: %x, Legacy:%d,IS SM4:%d, Unknown:%d",
__func__, p_dev_rec->sm4,
BTM_SEC_IS_SM4_LEGACY(p_dev_rec->sm4),
BTM_SEC_IS_SM4(p_dev_rec->sm4),
BTM_SEC_IS_SM4_UNKNOWN(p_dev_rec->sm4));
/* BT 2.1 or carkit, bring up the connection to force the peer to request
*PIN.
** Else prefetch (btm_sec_check_prefetch_pin will do the prefetching if
*needed)
*/
if ((p_dev_rec->sm4 != BTM_SM4_KNOWN) ||
!btm_sec_check_prefetch_pin(p_dev_rec)) {
/* if we rejected incoming connection request, we have to wait
* HCI_Connection_Complete event */
/* before originating */
if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_REJECTED_CONNECT) {
BTM_TRACE_WARNING(
"%s: waiting HCI_Connection_Complete after rejecting connection",
__func__);
}
/* Both we and the peer are 2.1 - continue to create connection */
else if (btm_sec_dd_create_conn(p_dev_rec) != BTM_CMD_STARTED) {
BTM_TRACE_WARNING("%s: failed to start connection", __func__);
btm_sec_change_pairing_state(BTM_PAIR_STATE_IDLE);
NotifyBondingChange(*p_dev_rec, HCI_ERR_MEMORY_FULL);
}
}
return;
} else {
BTM_TRACE_WARNING("%s: wrong BDA, retry with pairing BDA", __func__);
if (BTM_ReadRemoteDeviceName(btm_cb.pairing_bda, NULL,
BT_TRANSPORT_BR_EDR) != BTM_CMD_STARTED) {
BTM_TRACE_ERROR("%s: failed to start remote name request", __func__);
NotifyBondingChange(*p_dev_rec, HCI_ERR_MEMORY_FULL);
};
return;
}
}
/* check if we were delaying link_key_callback because name was not resolved
*/
if (p_dev_rec->link_key_not_sent) {
/* If HCI connection complete has not arrived, wait for it */
if (p_dev_rec->hci_handle == HCI_INVALID_HANDLE) return;
p_dev_rec->link_key_not_sent = false;
btm_send_link_key_notif(p_dev_rec);
}
/* If this is a bonding procedure can disconnect the link now */
if ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) &&
(p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED)) {
BTM_TRACE_WARNING("btm_sec_rmt_name_request_complete (none/ce)");
p_dev_rec->security_required &= ~(BTM_SEC_OUT_AUTHENTICATE);
l2cu_start_post_bond_timer(p_dev_rec->hci_handle);
return;
}
if (old_sec_state != BTM_SEC_STATE_GETTING_NAME) return;
/* If get name failed, notify the waiting layer */
if (status != HCI_SUCCESS) {
btm_sec_dev_rec_cback_event(p_dev_rec, BTM_ERR_PROCESSING, false);
return;
}
if (p_dev_rec->sm4 & BTM_SM4_REQ_PEND) {
BTM_TRACE_EVENT("waiting for remote features!!");
return;
}
/* Remote Name succeeded, execute the next security procedure, if any */
tBTM_STATUS btm_status = btm_sec_execute_procedure(p_dev_rec);
/* If result is pending reply from the user or from the device is pending */
if (btm_status == BTM_CMD_STARTED) return;
/* There is no next procedure or start of procedure failed, notify the waiting
* layer */
btm_sec_dev_rec_cback_event(p_dev_rec, btm_status, false);
}
/*******************************************************************************
*
* Function btm_sec_rmt_host_support_feat_evt
*
* Description This function is called when the
* HCI_RMT_HOST_SUP_FEAT_NOTIFY_EVT is received
*
* Returns void
*
******************************************************************************/
void btm_sec_rmt_host_support_feat_evt(const uint8_t* p) {
tBTM_SEC_DEV_REC* p_dev_rec;
RawAddress bd_addr; /* peer address */
BD_FEATURES features;
STREAM_TO_BDADDR(bd_addr, p);
p_dev_rec = btm_find_or_alloc_dev(bd_addr);
BTM_TRACE_EVENT("btm_sec_rmt_host_support_feat_evt sm4: 0x%x p[0]: 0x%x",
p_dev_rec->sm4, p[0]);
if (BTM_SEC_IS_SM4_UNKNOWN(p_dev_rec->sm4)) {
p_dev_rec->sm4 = BTM_SM4_KNOWN;
STREAM_TO_ARRAY(features, p, HCI_FEATURE_BYTES_PER_PAGE);
if (HCI_SSP_HOST_SUPPORTED(features)) {
p_dev_rec->sm4 = BTM_SM4_TRUE;
}
BTM_TRACE_EVENT(
"btm_sec_rmt_host_support_feat_evt sm4: 0x%x features[0]: 0x%x",
p_dev_rec->sm4, features[0]);
}
}
/*******************************************************************************
*
* Function btm_io_capabilities_req
*
* Description This function is called when LM request for the IO
* capability of the local device and
* if the OOB data is present for the device in the event
*
* Returns void
*
******************************************************************************/
void btm_io_capabilities_req(const RawAddress& p) {
if (btm_sec_is_a_bonded_dev(p)) {
BTM_TRACE_WARNING(
"%s: Incoming bond request, but %s is already bonded (removing)",
__func__, p.ToString().c_str());
bta_dm_process_remove_device(p);
}
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_or_alloc_dev(p);
if ((btm_cb.security_mode == BTM_SEC_MODE_SC) &&
(!p_dev_rec->remote_feature_received)) {
BTM_TRACE_EVENT("%s: Device security mode is SC only.",
"To continue need to know remote features.", __func__);
// ACL calls back to btm_sec_set_peer_sec_caps after it gets data
p_dev_rec->remote_features_needed = true;
return;
}
tBTM_SP_IO_REQ evt_data;
evt_data.bd_addr = p;
/* setup the default response according to compile options */
/* assume that the local IO capability does not change
* loc_io_caps is initialized with the default value */
evt_data.io_cap = btm_cb.devcb.loc_io_caps;
// TODO(optedoblivion): Inject OOB_DATA_PRESENT Flag
evt_data.oob_data = BTM_OOB_NONE;
evt_data.auth_req = BTM_AUTH_SP_NO;
BTM_TRACE_EVENT("%s: State: %s", __func__,
btm_pair_state_descr(btm_cb.pairing_state));
BTM_TRACE_DEBUG("%s:Security mode: %d", __func__, btm_cb.security_mode);
p_dev_rec->sm4 |= BTM_SM4_TRUE;
BTM_TRACE_EVENT("%s: State: %s Flags: 0x%04x", __func__,
btm_pair_state_descr(btm_cb.pairing_state),
btm_cb.pairing_flags);
uint8_t err_code = 0;
bool is_orig = true;
switch (btm_cb.pairing_state) {
/* initiator connecting */
case BTM_PAIR_STATE_IDLE:
// TODO: Handle Idle pairing state
// security_required = p_dev_rec->security_required;
break;
/* received IO capability response already->acceptor */
case BTM_PAIR_STATE_INCOMING_SSP:
is_orig = false;
if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_PEER_STARTED_DD) {
/* acceptor in dedicated bonding */
evt_data.auth_req = BTM_AUTH_AP_YES;
}
break;
/* initiator, at this point it is expected to be dedicated bonding
initiated by local device */
case BTM_PAIR_STATE_WAIT_PIN_REQ:
if (evt_data.bd_addr == btm_cb.pairing_bda) {
evt_data.auth_req = BTM_AUTH_AP_YES;
} else {
err_code = HCI_ERR_HOST_BUSY_PAIRING;
}
break;
/* any other state is unexpected */
default:
err_code = HCI_ERR_HOST_BUSY_PAIRING;
BTM_TRACE_ERROR("%s: Unexpected Pairing state received %d", __func__,
btm_cb.pairing_state);
break;
}
if (btm_cb.pairing_disabled) {
/* pairing is not allowed */
BTM_TRACE_DEBUG("%s: Pairing is not allowed -> fail pairing.", __func__);
err_code = HCI_ERR_PAIRING_NOT_ALLOWED;
} else if (btm_cb.security_mode == BTM_SEC_MODE_SC) {
bool local_supports_sc =
controller_get_interface()->supports_secure_connections();
/* device in Secure Connections Only mode */
if (!(local_supports_sc) || !(p_dev_rec->SupportsSecureConnections())) {
LOG_DEBUG(
"SC only service, local_support_for_sc:%s,"
" remote_support_for_sc:%s -> fail pairing",
logbool(local_supports_sc).c_str(),
logbool(p_dev_rec->SupportsSecureConnections()).c_str());
err_code = HCI_ERR_PAIRING_NOT_ALLOWED;
}
}
if (err_code != 0) {
btsnd_hcic_io_cap_req_neg_reply(evt_data.bd_addr, err_code);
return;
}
evt_data.is_orig = is_orig;
if (is_orig) {
/* local device initiated the pairing non-bonding -> use
* required_security_flags_for_pairing */
if (!(btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) &&
(p_dev_rec->required_security_flags_for_pairing &
BTM_SEC_OUT_AUTHENTICATE)) {
if (btm_cb.security_mode == BTM_SEC_MODE_SC) {
/* SC only mode device requires MITM protection */
evt_data.auth_req = BTM_AUTH_SP_YES;
} else {
evt_data.auth_req =
(p_dev_rec->required_security_flags_for_pairing & BTM_SEC_OUT_MITM)
? BTM_AUTH_SP_YES
: BTM_AUTH_SP_NO;
}
}
}
/* Notify L2CAP to increase timeout */
l2c_pin_code_request(evt_data.bd_addr);
btm_cb.pairing_bda = evt_data.bd_addr;
if (evt_data.bd_addr == btm_cb.connecting_bda)
memcpy(p_dev_rec->dev_class, btm_cb.connecting_dc, DEV_CLASS_LEN);
btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_LOCAL_IOCAPS);
if (p_dev_rec->sm4 & BTM_SM4_UPGRADE) {
p_dev_rec->sm4 &= ~BTM_SM4_UPGRADE;
/* link key upgrade: always use SPGB_YES - assuming we want to save the link
* key */
evt_data.auth_req = BTM_AUTH_SPGB_YES;
} else if (btm_cb.api.p_sp_callback) {
/* the callback function implementation may change the IO capability... */
(*btm_cb.api.p_sp_callback)(BTM_SP_IO_REQ_EVT,
(tBTM_SP_EVT_DATA*)&evt_data);
}
if ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)) {
evt_data.auth_req =
(BTM_AUTH_DD_BOND | (evt_data.auth_req & BTM_AUTH_YN_BIT));
}
if (btm_cb.security_mode == BTM_SEC_MODE_SC) {
/* At this moment we know that both sides are SC capable, device in */
/* SC only mode requires MITM for any service so let's set MITM bit */
evt_data.auth_req |= BTM_AUTH_YN_BIT;
BTM_TRACE_DEBUG("%s: for device in \"SC only\" mode set auth_req to 0x%02x",
__func__, evt_data.auth_req);
}
/* if the user does not indicate "reply later" by setting the oob_data to
* unknown */
/* send the response right now. Save the current IO capability in the
* control block */
btm_cb.devcb.loc_auth_req = evt_data.auth_req;
btm_cb.devcb.loc_io_caps = evt_data.io_cap;
BTM_TRACE_EVENT("%s: State: %s IO_CAP:%d oob_data:%d auth_req:%d", __func__,
btm_pair_state_descr(btm_cb.pairing_state), evt_data.io_cap,
evt_data.oob_data, evt_data.auth_req);
btsnd_hcic_io_cap_req_reply(evt_data.bd_addr, evt_data.io_cap,
evt_data.oob_data, evt_data.auth_req);
}
/*******************************************************************************
*
* Function btm_io_capabilities_rsp
*
* Description This function is called when the IO capability of the
* specified device is received
*
* Returns void
*
******************************************************************************/
void btm_io_capabilities_rsp(const uint8_t* p) {
tBTM_SEC_DEV_REC* p_dev_rec;
tBTM_SP_IO_RSP evt_data;
STREAM_TO_BDADDR(evt_data.bd_addr, p);
STREAM_TO_UINT8(evt_data.io_cap, p);
STREAM_TO_UINT8(evt_data.oob_data, p);
STREAM_TO_UINT8(evt_data.auth_req, p);
/* Allocate a new device record or reuse the oldest one */
p_dev_rec = btm_find_or_alloc_dev(evt_data.bd_addr);
/* If no security is in progress, this indicates incoming security */
if (btm_cb.pairing_state == BTM_PAIR_STATE_IDLE) {
btm_cb.pairing_bda = evt_data.bd_addr;
btm_sec_change_pairing_state(BTM_PAIR_STATE_INCOMING_SSP);
/* work around for FW bug */
btm_inq_stop_on_ssp();
}
/* Notify L2CAP to increase timeout */
l2c_pin_code_request(evt_data.bd_addr);
/* We must have a device record here.
* Use the connecting device's CoD for the connection */
if (evt_data.bd_addr == btm_cb.connecting_bda)
memcpy(p_dev_rec->dev_class, btm_cb.connecting_dc, DEV_CLASS_LEN);
/* peer sets dedicated bonding bit and we did not initiate dedicated bonding
*/
if (btm_cb.pairing_state ==
BTM_PAIR_STATE_INCOMING_SSP /* peer initiated bonding */
&& (evt_data.auth_req &
BTM_AUTH_DD_BOND)) /* and dedicated bonding bit is set */
{
btm_cb.pairing_flags |= BTM_PAIR_FLAGS_PEER_STARTED_DD;
}
/* save the IO capability in the device record */
p_dev_rec->rmt_io_caps = evt_data.io_cap;
p_dev_rec->rmt_auth_req = evt_data.auth_req;
if (btm_cb.api.p_sp_callback)
(*btm_cb.api.p_sp_callback)(BTM_SP_IO_RSP_EVT,
(tBTM_SP_EVT_DATA*)&evt_data);
}
/*******************************************************************************
*
* Function btm_proc_sp_req_evt
*
* Description This function is called to process/report
* HCI_USER_CONFIRMATION_REQUEST_EVT
* or HCI_USER_PASSKEY_REQUEST_EVT
* or HCI_USER_PASSKEY_NOTIFY_EVT
*
* Returns void
*
******************************************************************************/
void btm_proc_sp_req_evt(tBTM_SP_EVT event, const uint8_t* p) {
tBTM_STATUS status = BTM_ERR_PROCESSING;
tBTM_SP_EVT_DATA evt_data;
RawAddress& p_bda = evt_data.cfm_req.bd_addr;
tBTM_SEC_DEV_REC* p_dev_rec;
/* All events start with bd_addr */
STREAM_TO_BDADDR(p_bda, p);
VLOG(2) << " BDA: " << p_bda << " event: 0x" << std::hex << +event
<< " State: " << btm_pair_state_descr(btm_cb.pairing_state);
p_dev_rec = btm_find_dev(p_bda);
if ((p_dev_rec != NULL) && (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) &&
(btm_cb.pairing_bda == p_bda)) {
evt_data.cfm_req.bd_addr = p_dev_rec->bd_addr;
memcpy(evt_data.cfm_req.dev_class, p_dev_rec->dev_class, DEV_CLASS_LEN);
strlcpy((char*)evt_data.cfm_req.bd_name, (char*)p_dev_rec->sec_bd_name,
BTM_MAX_REM_BD_NAME_LEN + 1);
switch (event) {
case BTM_SP_CFM_REQ_EVT:
/* Numeric confirmation. Need user to conf the passkey */
btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_NUMERIC_CONFIRM);
/* The device record must be allocated in the "IO cap exchange" step */
STREAM_TO_UINT32(evt_data.cfm_req.num_val, p);
BTM_TRACE_DEBUG("BTM_SP_CFM_REQ_EVT: num_val: %u",
evt_data.cfm_req.num_val);
evt_data.cfm_req.just_works = true;
/* process user confirm req in association with the auth_req param */
if (btm_cb.devcb.loc_io_caps == BTM_IO_CAP_IO) {
if (p_dev_rec->rmt_io_caps == BTM_IO_CAP_UNKNOWN) {
BTM_TRACE_ERROR(
"%s did not receive IO cap response prior"
" to BTM_SP_CFM_REQ_EVT, failing pairing request",
__func__);
status = BTM_WRONG_MODE;
BTM_ConfirmReqReply(status, p_bda);
return;
}
if ((p_dev_rec->rmt_io_caps == BTM_IO_CAP_IO ||
p_dev_rec->rmt_io_caps == BTM_IO_CAP_OUT) &&
(btm_cb.devcb.loc_io_caps == BTM_IO_CAP_IO) &&
((p_dev_rec->rmt_auth_req & BTM_AUTH_SP_YES) ||
(btm_cb.devcb.loc_auth_req & BTM_AUTH_SP_YES))) {
/* Use Numeric Comparison if
* 1. Local IO capability is DisplayYesNo,
* 2. Remote IO capability is DisplayOnly or DiaplayYesNo, and
* 3. Either of the devices have requested authenticated link key */
evt_data.cfm_req.just_works = false;
}
}
BTM_TRACE_DEBUG(
"btm_proc_sp_req_evt() just_works:%d, io loc:%d, rmt:%d, auth "
"loc:%d, rmt:%d",
evt_data.cfm_req.just_works, btm_cb.devcb.loc_io_caps,
p_dev_rec->rmt_io_caps, btm_cb.devcb.loc_auth_req,
p_dev_rec->rmt_auth_req);
evt_data.cfm_req.loc_auth_req = btm_cb.devcb.loc_auth_req;
evt_data.cfm_req.rmt_auth_req = p_dev_rec->rmt_auth_req;
evt_data.cfm_req.loc_io_caps = btm_cb.devcb.loc_io_caps;
evt_data.cfm_req.rmt_io_caps = p_dev_rec->rmt_io_caps;
break;
case BTM_SP_KEY_NOTIF_EVT:
/* Passkey notification (other side is a keyboard) */
STREAM_TO_UINT32(evt_data.key_notif.passkey, p);
BTM_TRACE_DEBUG("BTM_SP_KEY_NOTIF_EVT: passkey: %u",
evt_data.key_notif.passkey);
btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
break;
case BTM_SP_KEY_REQ_EVT:
if (btm_cb.devcb.loc_io_caps != BTM_IO_CAP_NONE) {
/* HCI_USER_PASSKEY_REQUEST_EVT */
btm_sec_change_pairing_state(BTM_PAIR_STATE_KEY_ENTRY);
}
break;
}
if (btm_cb.api.p_sp_callback) {
status = (*btm_cb.api.p_sp_callback)(event, &evt_data);
if (status != BTM_NOT_AUTHORIZED) {
return;
}
/* else BTM_NOT_AUTHORIZED means when the app wants to reject the req
* right now */
} else if ((event == BTM_SP_CFM_REQ_EVT) && (evt_data.cfm_req.just_works)) {
/* automatically reply with just works if no sp_cback */
status = BTM_SUCCESS;
}
if (event == BTM_SP_CFM_REQ_EVT) {
BTM_TRACE_DEBUG("calling BTM_ConfirmReqReply with status: %d", status);
BTM_ConfirmReqReply(status, p_bda);
} else if (btm_cb.devcb.loc_io_caps != BTM_IO_CAP_NONE &&
event == BTM_SP_KEY_REQ_EVT) {
BTM_PasskeyReqReply(status, p_bda, 0);
}
return;
}
/* Something bad. we can only fail this connection */
acl_set_disconnect_reason(HCI_ERR_HOST_REJECT_SECURITY);
if (BTM_SP_CFM_REQ_EVT == event) {
btsnd_hcic_user_conf_reply(p_bda, false);
} else if (BTM_SP_KEY_NOTIF_EVT == event) {
/* do nothing -> it very unlikely to happen.
This event is most likely to be received by a HID host when it first
connects to a HID device.
Usually the Host initiated the connection in this case.
On Mobile platforms, if there's a security process happening,
the host probably can not initiate another connection.
BTW (PC) is another story. */
p_dev_rec = btm_find_dev(p_bda);
if (p_dev_rec != NULL) {
btm_sec_disconnect(
p_dev_rec->hci_handle, HCI_ERR_AUTH_FAILURE,
"stack::btm::btm_sec::btm_proc_sp_req_evt Security failure");
}
} else if (btm_cb.devcb.loc_io_caps != BTM_IO_CAP_NONE) {
btsnd_hcic_user_passkey_neg_reply(p_bda);
}
}
/*******************************************************************************
*
* Function btm_simple_pair_complete
*
* Description This function is called when simple pairing process is
* complete
*
* Returns void
*
******************************************************************************/
void btm_simple_pair_complete(const uint8_t* p) {
RawAddress bd_addr;
tBTM_SEC_DEV_REC* p_dev_rec;
uint8_t status;
bool disc = false;
status = *p++;
STREAM_TO_BDADDR(bd_addr, p);
p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec == NULL) {
LOG(ERROR) << __func__ << " with unknown BDA: " << bd_addr;
return;
}
BTM_TRACE_EVENT(
"btm_simple_pair_complete() Pair State: %s Status:%d sec_state: %u",
btm_pair_state_descr(btm_cb.pairing_state), status, p_dev_rec->sec_state);
if (status == HCI_SUCCESS) {
p_dev_rec->sec_flags |= BTM_SEC_AUTHENTICATED;
} else if (status == HCI_ERR_PAIRING_NOT_ALLOWED) {
/* The test spec wants the peer device to get this failure code. */
btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_DISCONNECT);
/* Change the timer to 1 second */
alarm_set_on_mloop(btm_cb.pairing_timer, BT_1SEC_TIMEOUT_MS,
btm_sec_pairing_timeout, NULL);
} else if (btm_cb.pairing_bda == bd_addr) {
/* stop the timer */
alarm_cancel(btm_cb.pairing_timer);
if (p_dev_rec->sec_state != BTM_SEC_STATE_AUTHENTICATING) {
/* the initiating side: will receive auth complete event. disconnect ACL
* at that time */
disc = true;
}
} else {
disc = true;
}
if (disc) {
/* simple pairing failed */
/* Avoid sending disconnect on HCI_ERR_PEER_USER */
if ((status != HCI_ERR_PEER_USER) &&
(status != HCI_ERR_CONN_CAUSE_LOCAL_HOST)) {
btm_sec_send_hci_disconnect(
p_dev_rec, HCI_ERR_AUTH_FAILURE, p_dev_rec->hci_handle,
"stack::btm::btm_sec::btm_simple_pair_complete Auth fail");
}
}
}
/*******************************************************************************
*
* Function btm_rem_oob_req
*
* Description This function is called to process/report
* HCI_REMOTE_OOB_DATA_REQUEST_EVT
*
* Returns void
*
******************************************************************************/
void btm_rem_oob_req(const uint8_t* p) {
tBTM_SP_RMT_OOB evt_data;
tBTM_SEC_DEV_REC* p_dev_rec;
Octet16 c;
Octet16 r;
RawAddress& p_bda = evt_data.bd_addr;
STREAM_TO_BDADDR(p_bda, p);
VLOG(2) << __func__ << " BDA: " << p_bda;
p_dev_rec = btm_find_dev(p_bda);
if ((p_dev_rec != NULL) && btm_cb.api.p_sp_callback) {
evt_data.bd_addr = p_dev_rec->bd_addr;
memcpy(evt_data.dev_class, p_dev_rec->dev_class, DEV_CLASS_LEN);
strlcpy((char*)evt_data.bd_name, (char*)p_dev_rec->sec_bd_name,
BTM_MAX_REM_BD_NAME_LEN + 1);
btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_LOCAL_OOB_RSP);
if ((*btm_cb.api.p_sp_callback)(BTM_SP_RMT_OOB_EVT,
(tBTM_SP_EVT_DATA*)&evt_data) ==
BTM_NOT_AUTHORIZED) {
BTM_RemoteOobDataReply(static_cast<tBTM_STATUS>(true), p_bda, c, r);
}
return;
}
/* something bad. we can only fail this connection */
acl_set_disconnect_reason(HCI_ERR_HOST_REJECT_SECURITY);
btsnd_hcic_rem_oob_neg_reply(p_bda);
}
/*******************************************************************************
*
* Function btm_read_local_oob_complete
*
* Description This function is called when read local oob data is
* completed by the LM
*
* Returns void
*
******************************************************************************/
void btm_read_local_oob_complete(uint8_t* p) {
tBTM_SP_LOC_OOB evt_data;
uint8_t status = *p++;
BTM_TRACE_EVENT("btm_read_local_oob_complete:%d", status);
if (status == HCI_SUCCESS) {
evt_data.status = BTM_SUCCESS;
STREAM_TO_ARRAY16(evt_data.c.data(), p);
STREAM_TO_ARRAY16(evt_data.r.data(), p);
} else
evt_data.status = BTM_ERR_PROCESSING;
if (btm_cb.api.p_sp_callback) {
tBTM_SP_EVT_DATA btm_sp_evt_data;
btm_sp_evt_data.loc_oob = evt_data;
(*btm_cb.api.p_sp_callback)(BTM_SP_LOC_OOB_EVT, &btm_sp_evt_data);
}
}
/*******************************************************************************
*
* Function btm_sec_auth_collision
*
* Description This function is called when authentication or encryption
* needs to be retried at a later time.
*
* Returns void
*
******************************************************************************/
static void btm_sec_auth_collision(uint16_t handle) {
tBTM_SEC_DEV_REC* p_dev_rec;
if (!btm_cb.collision_start_time)
btm_cb.collision_start_time = bluetooth::common::time_get_os_boottime_ms();
if ((bluetooth::common::time_get_os_boottime_ms() -
btm_cb.collision_start_time) < BTM_SEC_MAX_COLLISION_DELAY) {
if (handle == HCI_INVALID_HANDLE) {
p_dev_rec = btm_sec_find_dev_by_sec_state(BTM_SEC_STATE_AUTHENTICATING);
if (p_dev_rec == NULL)
p_dev_rec = btm_sec_find_dev_by_sec_state(BTM_SEC_STATE_ENCRYPTING);
} else
p_dev_rec = btm_find_dev_by_handle(handle);
if (p_dev_rec != NULL) {
BTM_TRACE_DEBUG(
"btm_sec_auth_collision: state %d (retrying in a moment...)",
p_dev_rec->sec_state);
/* We will restart authentication after timeout */
if (p_dev_rec->sec_state == BTM_SEC_STATE_AUTHENTICATING ||
p_dev_rec->sec_state == BTM_SEC_STATE_ENCRYPTING)
p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;
btm_cb.p_collided_dev_rec = p_dev_rec;
alarm_set_on_mloop(btm_cb.sec_collision_timer, BT_1SEC_TIMEOUT_MS,
btm_sec_collision_timeout, NULL);
}
}
}
/******************************************************************************
*
* Function btm_sec_auth_retry
*
* Description This function is called when authentication or encryption
* needs to be retried at a later time.
*
* Returns TRUE if a security retry required
*
*****************************************************************************/
static bool btm_sec_auth_retry(uint16_t handle, uint8_t status) {
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev_by_handle(handle);
if (!p_dev_rec) return false;
/* keep the old sm4 flag and clear the retry bit in control block */
uint8_t old_sm4 = p_dev_rec->sm4;
p_dev_rec->sm4 &= ~BTM_SM4_RETRY;
if ((btm_cb.pairing_state == BTM_PAIR_STATE_IDLE) &&
((old_sm4 & BTM_SM4_RETRY) == 0) && (HCI_ERR_KEY_MISSING == status) &&
BTM_SEC_IS_SM4(p_dev_rec->sm4)) {
/* This retry for missing key is for Lisbon or later only.
Legacy device do not need this. the controller will drive the retry
automatically
set the retry bit */
btm_cb.collision_start_time = 0;
btm_restore_mode();
p_dev_rec->sm4 |= BTM_SM4_RETRY;
p_dev_rec->sec_flags &= ~BTM_SEC_LINK_KEY_KNOWN;
BTM_TRACE_DEBUG("%s Retry for missing key sm4:x%x sec_flags:0x%x", __func__,
p_dev_rec->sm4, p_dev_rec->sec_flags);
/* With BRCM controller, we do not need to delete the stored link key in
controller.
If the stack may sit on top of other controller, we may need this
BTM_DeleteStoredLinkKey (bd_addr, NULL); */
p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;
btm_sec_execute_procedure(p_dev_rec);
return true;
}
return false;
}
void btm_sec_auth_complete(uint16_t handle, tHCI_STATUS status) {
tBTM_PAIRING_STATE old_state = btm_cb.pairing_state;
tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev_by_handle(handle);
bool are_bonding = false;
bool was_authenticating = false;
if (p_dev_rec) {
VLOG(2) << __func__ << ": Security Manager: in state: "
<< btm_pair_state_descr(btm_cb.pairing_state)
<< " handle:" << handle << " status:" << status
<< "dev->sec_state:" << p_dev_rec->sec_state
<< " bda:" << p_dev_rec->bd_addr
<< "RName:" << p_dev_rec->sec_bd_name;
} else {
VLOG(2) << __func__ << ": Security Manager: in state: "
<< btm_pair_state_descr(btm_cb.pairing_state)
<< " handle:" << handle << " status:" << status;
}
/* For transaction collision we need to wait and repeat. There is no need */
/* for random timeout because only peripheral should receive the result */
if ((status == HCI_ERR_LMP_ERR_TRANS_COLLISION) ||
(status == HCI_ERR_DIFF_TRANSACTION_COLLISION)) {
b