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/******************************************************************************
*
* Copyright (C) 1999-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This file contains functions for the Bluetooth Security Manager
*
******************************************************************************/
#define LOG_TAG "bt_btm_sec"
#include <stdarg.h>
#include <string.h>
#include "device/include/controller.h"
#include "osi/include/log.h"
#include "osi/include/time.h"
#include "bt_types.h"
#include "bt_utils.h"
#include "btm_int.h"
#include "btu.h"
#include "hcimsgs.h"
#include "l2c_int.h"
#if (BT_USE_TRACES == TRUE && BT_TRACE_VERBOSE == FALSE)
/* needed for sprintf() */
#include <stdio.h>
#endif
#if BLE_INCLUDED == TRUE
#include "gatt_int.h"
#endif
#define BTM_SEC_MAX_COLLISION_DELAY (5000)
extern fixed_queue_t *btu_general_alarm_queue;
#ifdef APPL_AUTH_WRITE_EXCEPTION
BOOLEAN (APPL_AUTH_WRITE_EXCEPTION)(BD_ADDR bd_addr);
#endif
/********************************************************************************
** 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 (BOOLEAN is_originator, UINT16 psm);
static tBTM_SEC_SERV_REC *btm_sec_find_next_serv (tBTM_SEC_SERV_REC *p_cur);
static tBTM_SEC_SERV_REC *btm_sec_find_mx_serv (UINT8 is_originator, UINT16 psm,
UINT32 mx_proto_id,
UINT32 mx_chan_id);
static tBTM_STATUS btm_sec_execute_procedure (tBTM_SEC_DEV_REC *p_dev_rec);
static BOOLEAN btm_sec_start_get_name (tBTM_SEC_DEV_REC *p_dev_rec);
static BOOLEAN btm_sec_start_authentication (tBTM_SEC_DEV_REC *p_dev_rec);
static BOOLEAN btm_sec_start_encryption (tBTM_SEC_DEV_REC *p_dev_rec);
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);
#if (BT_USE_TRACES == TRUE)
static char *btm_pair_state_descr (tBTM_PAIRING_STATE state);
#endif
static void btm_sec_check_pending_reqs(void);
static BOOLEAN btm_sec_queue_mx_request (BD_ADDR bd_addr, UINT16 psm, BOOLEAN is_orig,
UINT32 mx_proto_id, UINT32 mx_chan_id,
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 BOOLEAN btm_sec_check_prefetch_pin (tBTM_SEC_DEV_REC *p_dev_rec);
static UINT8 btm_sec_start_authorization (tBTM_SEC_DEV_REC *p_dev_rec);
BOOLEAN btm_sec_are_all_trusted(UINT32 p_mask[]);
static tBTM_STATUS btm_sec_send_hci_disconnect (tBTM_SEC_DEV_REC *p_dev_rec, UINT8 reason, UINT16 conn_handle);
UINT8 btm_sec_start_role_switch (tBTM_SEC_DEV_REC *p_dev_rec);
tBTM_SEC_DEV_REC *btm_sec_find_dev_by_sec_state (UINT8 state);
static BOOLEAN btm_sec_set_security_level ( CONNECTION_TYPE conn_type, char *p_name, UINT8 service_id,
UINT16 sec_level, UINT16 psm, UINT32 mx_proto_id,
UINT32 mx_chan_id);
static BOOLEAN btm_dev_authenticated(tBTM_SEC_DEV_REC *p_dev_rec);
static BOOLEAN btm_dev_encrypted(tBTM_SEC_DEV_REC *p_dev_rec);
static BOOLEAN btm_dev_authorized(tBTM_SEC_DEV_REC *p_dev_rec);
static BOOLEAN btm_serv_trusted(tBTM_SEC_DEV_REC *p_dev_rec, tBTM_SEC_SERV_REC *p_serv_rec);
static BOOLEAN btm_sec_is_serv_level0 (UINT16 psm);
static UINT16 btm_sec_set_serv_level4_flags (UINT16 cur_security, BOOLEAN is_originator);
static BOOLEAN btm_sec_queue_encrypt_request (BD_ADDR 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 encr_enable);
static BOOLEAN btm_sec_use_smp_br_chnl(tBTM_SEC_DEV_REC *p_dev_rec);
static BOOLEAN btm_sec_is_master(tBTM_SEC_DEV_REC *p_dev_rec);
/* TRUE - authenticated link key is possible */
static const BOOLEAN 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 */
/*******************************************************************************
**
** Function btm_dev_authenticated
**
** Description check device is authenticated
**
** Returns BOOLEAN TRUE or FALSE
**
*******************************************************************************/
static BOOLEAN 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 BOOLEAN TRUE or FALSE
**
*******************************************************************************/
static BOOLEAN 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_authorized
**
** Description check device is authorized
**
** Returns BOOLEAN TRUE or FALSE
**
*******************************************************************************/
static BOOLEAN btm_dev_authorized (tBTM_SEC_DEV_REC *p_dev_rec)
{
if(p_dev_rec->sec_flags & BTM_SEC_AUTHORIZED)
{
return(TRUE);
}
return(FALSE);
}
/*******************************************************************************
**
** Function btm_dev_16_digit_authenticated
**
** Description check device is authenticated by using 16 digit pin or MITM
**
** Returns BOOLEAN TRUE or FALSE
**
*******************************************************************************/
static BOOLEAN 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 btm_serv_trusted
**
** Description check service is trusted
**
** Returns BOOLEAN TRUE or FALSE
**
*******************************************************************************/
static BOOLEAN btm_serv_trusted(tBTM_SEC_DEV_REC *p_dev_rec, tBTM_SEC_SERV_REC *p_serv_rec)
{
if(BTM_SEC_IS_SERVICE_TRUSTED(p_dev_rec->trusted_mask, p_serv_rec->service_id))
{
return(TRUE);
}
return(FALSE);
}
/*******************************************************************************
**
** 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
**
*******************************************************************************/
BOOLEAN BTM_SecRegister(tBTM_APPL_INFO *p_cb_info)
{
#if BLE_INCLUDED == TRUE
BT_OCTET16 temp_value = {0};
#endif
BTM_TRACE_EVENT("%s application registered", __func__);
#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
LOG_INFO(LOG_TAG, "%s p_cb_info->p_le_callback == 0x%p", __func__, p_cb_info->p_le_callback);
if (p_cb_info->p_le_callback)
{
#if SMP_INCLUDED == TRUE
BTM_TRACE_EVENT("%s SMP_Register( btm_proc_smp_cback )", __func__);
SMP_Register(btm_proc_smp_cback);
#endif
/* if no IR is loaded, need to regenerate all the keys */
if (memcmp(btm_cb.devcb.id_keys.ir, &temp_value, sizeof(BT_OCTET16)) == 0)
{
btm_ble_reset_id();
}
}
else
{
LOG_WARN(LOG_TAG, "%s p_cb_info->p_le_callback == NULL", __func__);
}
#endif
btm_cb.api = *p_cb_info;
#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
LOG_INFO(LOG_TAG, "%s btm_cb.api.p_le_callback = 0x%p ", __func__, btm_cb.api.p_le_callback);
#endif
BTM_TRACE_EVENT("%s application registered", __func__);
return(TRUE);
}
/*******************************************************************************
**
** Function BTM_SecRegisterLinkKeyNotificationCallback
**
** Description Application manager calls this function to register for
** link key notification. When there is nobody registered
** we should avoid changing link key
**
** Returns TRUE if registered OK, else FALSE
**
*******************************************************************************/
BOOLEAN BTM_SecRegisterLinkKeyNotificationCallback (tBTM_LINK_KEY_CALLBACK *p_callback)
{
btm_cb.api.p_link_key_callback = p_callback;
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
**
*******************************************************************************/
BOOLEAN 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
**
*******************************************************************************/
BOOLEAN 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);
}
/*******************************************************************************
**
** Function BTM_GetSecurityFlags
**
** Description Get security flags for the device
**
** Returns BOOLEAN TRUE or FALSE is device found
**
*******************************************************************************/
BOOLEAN BTM_GetSecurityFlags (BD_ADDR bd_addr, UINT8 * p_sec_flags)
{
tBTM_SEC_DEV_REC *p_dev_rec;
if ((p_dev_rec = btm_find_dev (bd_addr)) != NULL)
{
*p_sec_flags = (UINT8) p_dev_rec->sec_flags;
return(TRUE);
}
BTM_TRACE_ERROR ("BTM_GetSecurityFlags false");
return(FALSE);
}
/*******************************************************************************
**
** Function BTM_GetSecurityFlagsByTransport
**
** Description Get security flags for the device on a particular transport
**
** Returns BOOLEAN TRUE or FALSE is device found
**
*******************************************************************************/
BOOLEAN BTM_GetSecurityFlagsByTransport (BD_ADDR bd_addr, UINT8 * p_sec_flags,
tBT_TRANSPORT transport)
{
tBTM_SEC_DEV_REC *p_dev_rec;
if ((p_dev_rec = btm_find_dev (bd_addr)) != NULL)
{
if (transport == BT_TRANSPORT_BR_EDR)
*p_sec_flags = (UINT8) p_dev_rec->sec_flags;
else
*p_sec_flags = (UINT8) (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 pin_type, PIN_CODE pin_code, UINT8 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);
}
/*******************************************************************************
**
** Function BTM_SetPairableMode
**
** Description Enable or disable pairing
**
** Parameters allow_pairing - (TRUE or FALSE) whether or not the device
** allows pairing.
** connect_only_paired - (TRUE or FALSE) whether or not to
** only allow paired devices to connect.
**
** Returns void
**
*******************************************************************************/
void BTM_SetPairableMode (BOOLEAN allow_pairing, BOOLEAN connect_only_paired)
{
BTM_TRACE_API ("BTM_SetPairableMode() allow_pairing: %u connect_only_paired: %u", allow_pairing, connect_only_paired);
btm_cb.pairing_disabled = !allow_pairing;
btm_cb.connect_only_paired = connect_only_paired;
}
/*******************************************************************************
**
** Function BTM_SetSecureConnectionsOnly
**
** Description Enable or disable default treatment for Mode 4 Level 0 services
**
** Parameter secure_connections_only_mode - (TRUE or FALSE) whether or not the device
** TRUE means that the device should treat Mode 4 Level 0 services as
** services of other levels. (Secure_connections_only_mode)
** FALSE means that the device should provide default treatment for
** Mode 4 Level 0 services.
**
** Returns void
**
*******************************************************************************/
void BTM_SetSecureConnectionsOnly (BOOLEAN secure_connections_only_mode)
{
BTM_TRACE_API("%s: Mode : %u", __FUNCTION__,
secure_connections_only_mode);
btm_cb.devcb.secure_connections_only = secure_connections_only_mode;
btm_cb.security_mode = BTM_SEC_MODE_SC;
}
#define BTM_NO_AVAIL_SEC_SERVICES ((UINT16) 0xffff)
/*******************************************************************************
**
** Function BTM_SetSecurityLevel
**
** Description Register service security level with Security Manager
**
** Parameters: is_originator - TRUE if originating the connection, FALSE if not
** p_name - Name of the service relevant only if
** authorization will show this name to user. ignored
** if BTM_SEC_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
**
*******************************************************************************/
BOOLEAN BTM_SetSecurityLevel (BOOLEAN is_originator, char *p_name, UINT8 service_id,
UINT16 sec_level, UINT16 psm, UINT32 mx_proto_id,
UINT32 mx_chan_id)
{
#if (L2CAP_UCD_INCLUDED == TRUE)
CONNECTION_TYPE conn_type;
if (is_originator)
conn_type = CONN_ORIENT_ORIG;
else
conn_type = CONN_ORIENT_TERM;
return(btm_sec_set_security_level (conn_type, p_name, service_id,
sec_level, psm, mx_proto_id, mx_chan_id));
#else
return(btm_sec_set_security_level (is_originator, p_name, service_id,
sec_level, psm, mx_proto_id, mx_chan_id));
#endif
}
/*******************************************************************************
**
** Function btm_sec_set_security_level
**
** Description Register service security level with Security Manager
**
** Parameters: conn_type - TRUE if originating the connection, FALSE if not
** p_name - Name of the service relevant only if
** authorization will show this name to user. ignored
** if BTM_SEC_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
**
*******************************************************************************/
static BOOLEAN btm_sec_set_security_level (CONNECTION_TYPE conn_type, char *p_name, UINT8 service_id,
UINT16 sec_level, UINT16 psm, UINT32 mx_proto_id,
UINT32 mx_chan_id)
{
tBTM_SEC_SERV_REC *p_srec;
UINT16 index;
UINT16 first_unused_record = BTM_NO_AVAIL_SEC_SERVICES;
BOOLEAN record_allocated = FALSE;
BOOLEAN is_originator;
#if (L2CAP_UCD_INCLUDED == TRUE)
BOOLEAN is_ucd;
if (conn_type & CONNECTION_TYPE_ORIG_MASK)
is_originator = TRUE;
else
is_originator = FALSE;
if (conn_type & CONNECTION_TYPE_CONNLESS_MASK )
{
is_ucd = TRUE;
}
else
{
is_ucd = FALSE;
}
#else
is_originator = conn_type;
#endif
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 BTM_SEC_SERVICE_NAME_LEN > 0
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,
BTM_SEC_SERVICE_NAME_LEN) ||
!strncmp (p_name, (char *) p_srec->term_service_name,
BTM_SEC_SERVICE_NAME_LEN)))
#else
if (p_srec->psm == psm &&
p_srec->mx_proto_id == mx_proto_id &&
service_id == p_srec->service_id)
#endif
{
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;
#if BTM_SEC_SERVICE_NAME_LEN > 0
strlcpy ((char *)p_srec->orig_service_name, p_name, BTM_SEC_SERVICE_NAME_LEN);
#endif
/* clear out the old setting, just in case it exists */
#if (L2CAP_UCD_INCLUDED == TRUE)
if ( is_ucd )
{
p_srec->ucd_security_flags &=
~(BTM_SEC_OUT_AUTHORIZE | BTM_SEC_OUT_ENCRYPT | BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_MITM |
BTM_SEC_FORCE_MASTER | BTM_SEC_ATTEMPT_MASTER | BTM_SEC_FORCE_SLAVE | BTM_SEC_ATTEMPT_SLAVE);
}
else
#endif
{
p_srec->security_flags &=
~(BTM_SEC_OUT_AUTHORIZE | BTM_SEC_OUT_ENCRYPT | BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_MITM |
BTM_SEC_FORCE_MASTER | BTM_SEC_ATTEMPT_MASTER | BTM_SEC_FORCE_SLAVE | BTM_SEC_ATTEMPT_SLAVE);
}
/* Parameter validation. Originator should not set requirements for incoming connections */
sec_level &= ~(BTM_SEC_IN_AUTHORIZE | 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_SP_DEBUG ||
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 */
#if (L2CAP_UCD_INCLUDED == TRUE)
if ( is_ucd == FALSE )
#endif
{
btm_cb.p_out_serv = p_srec;
}
}
else
{
p_srec->term_mx_chan_id = mx_chan_id;
#if BTM_SEC_SERVICE_NAME_LEN > 0
strlcpy ((char *)p_srec->term_service_name, p_name, BTM_SEC_SERVICE_NAME_LEN);
#endif
/* clear out the old setting, just in case it exists */
#if (L2CAP_UCD_INCLUDED == TRUE)
if ( is_ucd )
{
p_srec->ucd_security_flags &=
~(BTM_SEC_IN_AUTHORIZE | BTM_SEC_IN_ENCRYPT | BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_MITM |
BTM_SEC_FORCE_MASTER | BTM_SEC_ATTEMPT_MASTER | BTM_SEC_FORCE_SLAVE | BTM_SEC_ATTEMPT_SLAVE
| BTM_SEC_IN_MIN_16_DIGIT_PIN);
}
else
#endif
{
p_srec->security_flags &=
~(BTM_SEC_IN_AUTHORIZE | BTM_SEC_IN_ENCRYPT | BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_MITM |
BTM_SEC_FORCE_MASTER | BTM_SEC_ATTEMPT_MASTER | BTM_SEC_FORCE_SLAVE | BTM_SEC_ATTEMPT_SLAVE
| BTM_SEC_IN_MIN_16_DIGIT_PIN);
}
/* Parameter validation. Acceptor should not set requirements for outgoing connections */
sec_level &= ~(BTM_SEC_OUT_AUTHORIZE | 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_SP_DEBUG ||
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;
}
#if (L2CAP_UCD_INCLUDED == TRUE)
if ( is_ucd )
{
p_srec->security_flags |= (UINT16)(BTM_SEC_IN_USE);
p_srec->ucd_security_flags |= (UINT16)(sec_level | BTM_SEC_IN_USE);
}
else
{
p_srec->security_flags |= (UINT16)(sec_level | BTM_SEC_IN_USE);
}
BTM_TRACE_API("BTM_SEC_REG[%d]: id %d, conn_type 0x%x, psm 0x%04x, proto_id %d, chan_id %d",
index, service_id, conn_type, psm, mx_proto_id, mx_chan_id);
BTM_TRACE_API(" : security_flags: 0x%04x, ucd_security_flags: 0x%04x",
p_srec->security_flags, p_srec->ucd_security_flags);
#if BTM_SEC_SERVICE_NAME_LEN > 0
BTM_TRACE_API(" : service name [%s] (up to %d chars saved)",
p_name, BTM_SEC_SERVICE_NAME_LEN);
#endif
#else
p_srec->security_flags |= (UINT16)(sec_level | BTM_SEC_IN_USE);
BTM_TRACE_API("BTM_SEC_REG[%d]: id %d, is_orig %d, psm 0x%04x, proto_id %d, chan_id %d",
index, service_id, is_originator, psm, mx_proto_id, mx_chan_id);
#if BTM_SEC_SERVICE_NAME_LEN > 0
BTM_TRACE_API(" : sec: 0x%x, service name [%s] (up to %d chars saved)",
p_srec->security_flags, p_name, BTM_SEC_SERVICE_NAME_LEN);
#endif
#endif
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 BTM_SecClrService (UINT8 service_id)
{
tBTM_SEC_SERV_REC *p_srec = &btm_cb.sec_serv_rec[0];
UINT8 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;
#if (L2CAP_UCD_INCLUDED == TRUE)
p_srec->ucd_security_flags = 0;
#endif
num_freed++;
}
}
return(num_freed);
}
/*******************************************************************************
**
** Function btm_sec_clr_service_by_psm
**
** 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 btm_sec_clr_service_by_psm (UINT16 psm)
{
tBTM_SEC_SERV_REC *p_srec = &btm_cb.sec_serv_rec[0];
UINT8 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_sec_clr_service_by_psm psm:0x%x num_freed:%d", psm, num_freed);
return(num_freed);
}
/*******************************************************************************
**
** Function btm_sec_clr_temp_auth_service
**
** Description Removes specified device record's temporary authorization
** flag from the security database.
**
** Parameters Device address to be cleared
**
** Returns void.
**
*******************************************************************************/
void btm_sec_clr_temp_auth_service (BD_ADDR bda)
{
tBTM_SEC_DEV_REC *p_dev_rec;
if ((p_dev_rec = btm_find_dev (bda)) == NULL)
{
BTM_TRACE_WARNING ("btm_sec_clr_temp_auth_service() - no dev CB");
return;
}
/* Reset the temporary authorized flag so that next time (untrusted) service is accessed autorization will take place */
if (p_dev_rec->last_author_service_id != BTM_SEC_NO_LAST_SERVICE_ID && p_dev_rec->p_cur_service)
{
BTM_TRACE_DEBUG ("btm_sec_clr_auth_service_by_psm [clearing device: %02x:%02x:%02x:%02x:%02x:%02x]",
bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]);
p_dev_rec->last_author_service_id = BTM_SEC_NO_LAST_SERVICE_ID;
}
}
/*******************************************************************************
**
** 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
** trusted_mask - bitwise OR of trusted services (array of UINT32)
**
*******************************************************************************/
void BTM_PINCodeReply (BD_ADDR bd_addr, UINT8 res, UINT8 pin_len, UINT8 *p_pin, UINT32 trusted_mask[])
{
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 (memcmp (bd_addr, btm_cb.pairing_bda, BD_ADDR_LEN) != 0)
{
BTM_TRACE_ERROR ("BTM_PINCodeReply() - Wrong BD Addr");
return;
}
if ((p_dev_rec = btm_find_dev (bd_addr)) == 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);
btm_cb.acl_disc_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;
}
if (trusted_mask)
BTM_SEC_COPY_TRUSTED_DEVICE(trusted_mask, p_dev_rec->trusted_mask);
p_dev_rec->sec_flags |= BTM_SEC_LINK_KEY_AUTHED;
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 == BTM_SEC_INVALID_HANDLE)
&& (btm_cb.security_mode_changed == FALSE) )
{
/* This is start of the dedicated bonding if local device is 2.0 */
btm_cb.pin_code_len = pin_len;
p_dev_rec->pin_code_length = pin_len;
memcpy (btm_cb.pin_code, p_pin, pin_len);
btm_cb.security_mode_changed = TRUE;
#ifdef APPL_AUTH_WRITE_EXCEPTION
if(!(APPL_AUTH_WRITE_EXCEPTION)(p_dev_rec->bd_addr))
#endif
btsnd_hcic_write_auth_enable (TRUE);
btm_cb.acl_disc_reason = 0xff ;
/* 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;
if (btm_cb.api.p_auth_complete_callback)
(*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class,
p_dev_rec->sec_bd_name, HCI_ERR_AUTH_FAILURE);
}
return;
}
btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
btm_cb.acl_disc_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
** trusted_mask - bitwise OR of trusted services (array of UINT32)
**
** Note: After 2.1 parameters are not used and preserved here not to change API
*******************************************************************************/
tBTM_STATUS btm_sec_bond_by_transport (BD_ADDR bd_addr, tBT_TRANSPORT transport,
UINT8 pin_len, UINT8 *p_pin, UINT32 trusted_mask[])
{
tBTM_SEC_DEV_REC *p_dev_rec;
tBTM_STATUS status;
UINT8 *p_features;
UINT8 ii;
tACL_CONN *p= btm_bda_to_acl(bd_addr, transport);
BTM_TRACE_API ("btm_sec_bond_by_transport BDA: %02x:%02x:%02x:%02x:%02x:%02x",
bd_addr[0], bd_addr[1], bd_addr[2], bd_addr[3], bd_addr[4], bd_addr[5]);
BTM_TRACE_DEBUG("btm_sec_bond_by_transport: Transport used %d" , transport);
/* 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);
}
if ((p_dev_rec = btm_find_or_alloc_dev (bd_addr)) == NULL)
{
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 != BTM_SEC_INVALID_HANDLE) && transport == BT_TRANSPORT_BR_EDR
&& (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED))
#if (BLE_INCLUDED == TRUE)
||((p_dev_rec->ble_hci_handle != BTM_SEC_INVALID_HANDLE) && transport == BT_TRANSPORT_LE
&& (p_dev_rec->sec_flags & BTM_SEC_LE_AUTHENTICATED))
#endif
)
{
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);
}
memcpy (btm_cb.pairing_bda, bd_addr, BD_ADDR_LEN);
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;
if (trusted_mask)
BTM_SEC_COPY_TRUSTED_DEVICE(trusted_mask, p_dev_rec->trusted_mask);
#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
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) == 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);
}
#endif
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);
}
}
for (ii = 0; ii <= HCI_EXT_FEATURES_PAGE_MAX; ii++)
{
p_features = p_dev_rec->features[ii];
BTM_TRACE_EVENT(" remote_features page[%1d] = %02x-%02x-%02x-%02x",
ii, p_features[0], p_features[1], p_features[2], p_features[3]);
BTM_TRACE_EVENT(" %02x-%02x-%02x-%02x",
p_features[4], p_features[5], p_features[6], p_features[7]);
}
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 (p && p->hci_handle != BTM_SEC_INVALID_HANDLE)
{
if (!btm_sec_start_authentication (p_dev_rec))
return(BTM_NO_RESOURCES);
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_SP_DEBUG ||
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);
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);
}
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);
return BTM_CMD_STARTED;
}
/* both local and peer are 2.1 */
status = btm_sec_dd_create_conn(p_dev_rec);
if (status != BTM_CMD_STARTED)
{
btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
}
return status;
}
/*******************************************************************************
**
** Function BTM_SecBondByTransport
**
** 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
** trusted_mask - bitwise OR of trusted services (array of UINT32)
**
** Note: After 2.1 parameters are not used and preserved here not to change API
*******************************************************************************/
tBTM_STATUS BTM_SecBondByTransport (BD_ADDR bd_addr, tBT_TRANSPORT transport,
UINT8 pin_len, UINT8 *p_pin, UINT32 trusted_mask[])
{
#if SMP_INCLUDED == TRUE
tBT_DEVICE_TYPE dev_type;
tBLE_ADDR_TYPE addr_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;
}
#endif
return btm_sec_bond_by_transport(bd_addr, transport, pin_len, p_pin, trusted_mask);
}
/*******************************************************************************
**
** 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
** pin_len - length in bytes of the PIN Code
** p_pin - pointer to array with the PIN Code
** trusted_mask - bitwise OR of trusted services (array of UINT32)
**
** Note: After 2.1 parameters are not used and preserved here not to change API
*******************************************************************************/
tBTM_STATUS BTM_SecBond (BD_ADDR bd_addr, UINT8 pin_len, UINT8 *p_pin, UINT32 trusted_mask[])
{
tBT_TRANSPORT transport = BT_TRANSPORT_BR_EDR;
#if BLE_INCLUDED == TRUE
if (BTM_UseLeLink(bd_addr))
transport = BT_TRANSPORT_LE;
#endif
return btm_sec_bond_by_transport(bd_addr, transport, pin_len, p_pin, trusted_mask);
}
/*******************************************************************************
**
** 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 (BD_ADDR 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);
if (((p_dev_rec = btm_find_dev (bd_addr)) == NULL)
|| (memcmp (btm_cb.pairing_bda, bd_addr, BD_ADDR_LEN) != 0) )
return BTM_UNKNOWN_ADDR;
#if SMP_INCLUDED == TRUE
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;
}
#endif
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 != BTM_SEC_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);
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)
{
if (btsnd_hcic_create_conn_cancel(bd_addr))
return BTM_CMD_STARTED;
return BTM_NO_RESOURCES;
}
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_SecGetDeviceLinkKey
**
** Description This function is called to obtain link key 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
**
** Parameters: bd_addr - Address of the device
** link_key - Link Key is copied into this array
**
*******************************************************************************/
tBTM_STATUS BTM_SecGetDeviceLinkKey (BD_ADDR bd_addr, LINK_KEY link_key)
{
tBTM_SEC_DEV_REC *p_dev_rec;
if (((p_dev_rec = btm_find_dev (bd_addr)) != NULL)
&& (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN))
{
memcpy (link_key, p_dev_rec->link_key, LINK_KEY_LEN);
return(BTM_SUCCESS);
}
return(BTM_UNKNOWN_ADDR);
}
/*******************************************************************************
**
** 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 (BD_ADDR 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 (BD_ADDR bd_addr, tBT_TRANSPORT transport, tBTM_SEC_CBACK *p_callback,
void *p_ref_data, tBTM_BLE_SEC_ACT sec_act)
{
tBTM_STATUS rc = 0;
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bd_addr);
if (!p_dev_rec ||
(transport == BT_TRANSPORT_BR_EDR && p_dev_rec->hci_handle == BTM_SEC_INVALID_HANDLE)
#if BLE_INCLUDED == TRUE
|| (transport == BT_TRANSPORT_LE && p_dev_rec->ble_hci_handle == BTM_SEC_INVALID_HANDLE)
#endif
)
{
/* Connection should be up and runnning */
BTM_TRACE_WARNING ("Security Manager: BTM_SetEncryption not connected");
if (p_callback)
(*p_callback) (bd_addr, transport, p_ref_data, BTM_WRONG_MODE);
return(BTM_WRONG_MODE);
}
if (transport == BT_TRANSPORT_BR_EDR &&
(p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED))
{
BTM_TRACE_EVENT ("Security Manager: BTM_SetEncryption already encrypted");
if (p_callback)
(*p_callback) (bd_addr, transport, p_ref_data, BTM_SUCCESS);
return(BTM_SUCCESS);
}
/* enqueue security request if security is active */
if (p_dev_rec->p_callback || (p_dev_rec->sec_state != BTM_SEC_STATE_IDLE))
{
BTM_TRACE_WARNING ("Security Manager: BTM_SetEncryption busy, enqueue request");
if (btm_sec_queue_encrypt_request(bd_addr, transport, p_callback, p_ref_data, sec_act))
{
return BTM_CMD_STARTED;
}
else
{
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;
BTM_TRACE_API ("Security Manager: BTM_SetEncryption Handle:%d State:%d Flags:0x%x Required:0x%x",
p_dev_rec->hci_handle, p_dev_rec->sec_state, p_dev_rec->sec_flags,
p_dev_rec->security_required);
#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
if (transport == BT_TRANSPORT_LE)
{
tACL_CONN *p = btm_bda_to_acl(bd_addr, transport);
if (p)
{
rc = btm_ble_set_encryption(bd_addr, sec_act, p->link_role);
}
else
{
rc = BTM_WRONG_MODE;
BTM_TRACE_WARNING("%s: cannot call btm_ble_set_encryption, p is NULL", __FUNCTION__);
}
}
else
#endif
rc = btm_sec_execute_procedure (p_dev_rec);
if (rc != BTM_CMD_STARTED && rc != BTM_BUSY)
{
if (p_callback)
{
p_dev_rec->p_callback = NULL;
(*p_callback) (bd_addr, transport, p_dev_rec->p_ref_data, rc);
}
}
return(rc);
}
/*******************************************************************************
* 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, UINT8 reason, UINT16 conn_handle)
{
UINT8 old_state = p_dev_rec->sec_state;
tBTM_STATUS status = BTM_CMD_STARTED;
BTM_TRACE_EVENT ("btm_sec_send_hci_disconnect: handle:0x%x, reason=0x%x",
conn_handle, reason);
/* send HCI_Disconnect on a transport only once */
switch (old_state)
{
case BTM_SEC_STATE_DISCONNECTING:
if (conn_handle == p_dev_rec->hci_handle)
return status;
p_dev_rec->sec_state = BTM_SEC_STATE_DISCONNECTING_BOTH;
break;
#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
case BTM_SEC_STATE_DISCONNECTING_BLE:
if (conn_handle == p_dev_rec->ble_hci_handle)
return status;
p_dev_rec->sec_state = BTM_SEC_STATE_DISCONNECTING_BOTH;
break;
case BTM_SEC_STATE_DISCONNECTING_BOTH:
return status;
#endif
default:
p_dev_rec->sec_state = (conn_handle == p_dev_rec->hci_handle) ?
BTM_SEC_STATE_DISCONNECTING : BTM_SEC_STATE_DISCONNECTING_BLE;
break;
}
/* If a role switch is in progress, delay the HCI Disconnect to avoid controller problem */
if (p_dev_rec->rs_disc_pending == BTM_SEC_RS_PENDING && p_dev_rec->hci_handle == conn_handle)
{
BTM_TRACE_DEBUG("RS in progress - Set DISC Pending flag in btm_sec_send_hci_disconnect to delay disconnect");
p_dev_rec->rs_disc_pending = BTM_SEC_DISC_PENDING;
status = BTM_SUCCESS;
}
/* Tear down the HCI link */
else if (!btsnd_hcic_disconnect (conn_handle, reason))
{
/* could not send disconnect. restore old state */
p_dev_rec->sec_state = old_state;
status = BTM_NO_RESOURCES;
}
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, BD_ADDR bd_addr)
{
tBTM_SEC_DEV_REC *p_dev_rec;
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)
|| (memcmp (btm_cb.pairing_bda, bd_addr, BD_ADDR_LEN) != 0) )
return;
btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
if ( (res == BTM_SUCCESS) || (res == BTM_SUCCESS_NO_SECURITY) )
{
btm_cb.acl_disc_reason = HCI_SUCCESS;
if (res == BTM_SUCCESS)
{
if ((p_dev_rec = btm_find_dev (bd_addr)) != NULL)
p_dev_rec->sec_flags |= BTM_SEC_LINK_KEY_AUTHED;
p_dev_rec->sec_flags |= BTM_SEC_16_DIGIT_PIN_AUTHED;
}
btsnd_hcic_user_conf_reply (bd_addr, TRUE);
}
else
{
/* Report authentication failed event from state BTM_PAIR_STATE_WAIT_AUTH_COMPLETE */
btm_cb.acl_disc_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)).
**
*******************************************************************************/
#if (BTM_LOCAL_IO_CAPS != BTM_IO_CAP_NONE)
void BTM_PasskeyReqReply(tBTM_STATUS res, BD_ADDR bd_addr, UINT32 passkey)
{
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)
|| (memcmp (btm_cb.pairing_bda, bd_addr, BD_ADDR_LEN) != 0) )
{
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)
{
btm_cb.acl_disc_reason = HCI_ERR_HOST_REJECT_SECURITY;
if (p_dev_rec->hci_handle != BTM_SEC_INVALID_HANDLE)
btm_sec_send_hci_disconnect (p_dev_rec, HCI_ERR_AUTH_FAILURE, p_dev_rec->hci_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 */
btm_cb.acl_disc_reason = HCI_ERR_HOST_REJECT_SECURITY;
btsnd_hcic_user_passkey_neg_reply (bd_addr);
} else {
btm_cb.acl_disc_reason = HCI_SUCCESS;
btsnd_hcic_user_passkey_reply (bd_addr, passkey);
}
}
#endif
/*******************************************************************************
**
** Function BTM_SendKeypressNotif
**
** Description This function is used during the passkey entry model
** by a device with KeyboardOnly IO capabilities
** (very likely to be a HID Device).
** It is called by a HID Device to inform the remote device when
** a key has been entered or erased.
**
** Parameters: bd_addr - Address of the peer device
** type - notification type
**
*******************************************************************************/
#if (BTM_LOCAL_IO_CAPS != BTM_IO_CAP_NONE)
void BTM_SendKeypressNotif(BD_ADDR bd_addr, tBTM_SP_KEY_TYPE type)
{
/* This API only make sense between PASSKEY_REQ and SP complete */
if (btm_cb.pairing_state == BTM_PAIR_STATE_KEY_ENTRY)
btsnd_hcic_send_keypress_notif (bd_addr, type);
}
#endif
/*******************************************************************************
**
** Function BTM_IoCapRsp
**
** Description This function is called in response to BTM_SP_IO_REQ_EVT
** When the event data io_req.oob_data is set to BTM_OOB_UNKNOWN
** by the tBTM_SP_CALLBACK implementation, this function is
** called to provide the actual response
**
** Parameters: bd_addr - Address of the peer device
** io_cap - The IO capability of local device.
** oob - BTM_OOB_NONE or BTM_OOB_PRESENT.
** auth_req- MITM protection required or not.
**
*******************************************************************************/
void BTM_IoCapRsp(BD_ADDR bd_addr, tBTM_IO_CAP io_cap, tBTM_OOB_DATA oob, tBTM_AUTH_REQ auth_req)
{
BTM_TRACE_EVENT ("BTM_IoCapRsp: state: %s oob: %d io_cap: %d",
btm_pair_state_descr(btm_cb.pairing_state), oob, io_cap);
if ( (btm_cb.pairing_state != BTM_PAIR_STATE_WAIT_LOCAL_IOCAPS)
|| (memcmp (btm_cb.pairing_bda, bd_addr, BD_ADDR_LEN) != 0) )
return;
if (oob < BTM_OOB_UNKNOWN && io_cap < BTM_IO_CAP_MAX)
{
btm_cb.devcb.loc_auth_req = auth_req;
btm_cb.devcb.loc_io_caps = io_cap;
if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)
auth_req = (BTM_AUTH_DD_BOND | (auth_req&BTM_AUTH_YN_BIT));
btsnd_hcic_io_cap_req_reply (bd_addr, io_cap, oob, auth_req);
}
}
/*******************************************************************************
**
** Function BTM_ReadLocalOobData
**
** Description This function is called to read the local OOB data from
** LM
**
*******************************************************************************/
tBTM_STATUS BTM_ReadLocalOobData(void)
{
tBTM_STATUS status = BTM_SUCCESS;
if (btsnd_hcic_read_local_oob_data() == FALSE)
status = BTM_NO_RESOURCES;
return status;
}
/*******************************************************************************
**
** 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, BD_ADDR bd_addr, BT_OCTET16 c, BT_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 */
btm_cb.acl_disc_reason = HCI_ERR_HOST_REJECT_SECURITY;
btsnd_hcic_rem_oob_neg_reply (bd_addr);
} else {
btm_cb.acl_disc_reason = HCI_SUCCESS;
btsnd_hcic_rem_oob_reply (bd_addr, c, r);
}
}
/*******************************************************************************
**
** Function BTM_BuildOobData
**
** Description This function is called to build the OOB data payload to
** be sent over OOB (non-Bluetooth) link
**
** Parameters: p_data - the location for OOB data
** max_len - p_data size.
** c - simple pairing Hash C.
** r - simple pairing Randomizer C.
** name_len- 0, local device name would not be included.
** otherwise, the local device name is included for
** up to this specified length
**
** Returns Number of bytes in p_data.
**
*******************************************************************************/
UINT16 BTM_BuildOobData(UINT8 *p_data, UINT16 max_len, BT_OCTET16 c,
BT_OCTET16 r, UINT8 name_len)
{
UINT8 *p = p_data;
UINT16 len = 0;
#if BTM_MAX_LOC_BD_NAME_LEN > 0
UINT16 name_size;
UINT8 name_type = BTM_EIR_SHORTENED_LOCAL_NAME_TYPE;
#endif
if (p_data && max_len >= BTM_OOB_MANDATORY_SIZE)
{
/* add mandatory part */
UINT16_TO_STREAM(p, len);
BDADDR_TO_STREAM(p, controller_get_interface()->get_address()->address);
len = BTM_OOB_MANDATORY_SIZE;
max_len -= len;
/* now optional part */
/* add Hash C */
UINT16 delta = BTM_OOB_HASH_C_SIZE + 2;
if (max_len >= delta)
{
*p++ = BTM_OOB_HASH_C_SIZE + 1;
*p++ = BTM_EIR_OOB_SSP_HASH_C_TYPE;
ARRAY_TO_STREAM(p, c, BTM_OOB_HASH_C_SIZE);
len += delta;
max_len -= delta;
}
/* add Rand R */
delta = BTM_OOB_RAND_R_SIZE + 2;
if (max_len >= delta)
{
*p++ = BTM_OOB_RAND_R_SIZE + 1;
*p++ = BTM_EIR_OOB_SSP_RAND_R_TYPE;
ARRAY_TO_STREAM(p, r, BTM_OOB_RAND_R_SIZE);
len += delta;
max_len -= delta;
}
/* add class of device */
delta = BTM_OOB_COD_SIZE + 2;
if (max_len >= delta)
{
*p++ = BTM_OOB_COD_SIZE + 1;
*p++ = BTM_EIR_OOB_COD_TYPE;
DEVCLASS_TO_STREAM(p, btm_cb.devcb.dev_class);
len += delta;
max_len -= delta;
}
#if BTM_MAX_LOC_BD_NAME_LEN > 0
name_size = name_len;
if (name_size > strlen(btm_cb.cfg.bd_name))
{
name_type = BTM_EIR_COMPLETE_LOCAL_NAME_TYPE;
name_size = (UINT16)strlen(btm_cb.cfg.bd_name);
}
delta = name_size + 2;
if (max_len >= delta)
{
*p++ = name_size + 1;
*p++ = name_type;
ARRAY_TO_STREAM (p, btm_cb.cfg.bd_name, name_size);
len += delta;
max_len -= delta;
}
#endif
/* update len */
p = p_data;
UINT16_TO_STREAM(p, len);
}
return len;
}
/*******************************************************************************
**
** 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.
**
*******************************************************************************/
BOOLEAN BTM_BothEndsSupportSecureConnections(BD_ADDR 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.
**
*******************************************************************************/
BOOLEAN BTM_PeerSupportsSecureConnections(BD_ADDR bd_addr)
{
tBTM_SEC_DEV_REC *p_dev_rec;
if ((p_dev_rec = btm_find_dev(bd_addr)) == NULL)
{
BTM_TRACE_WARNING("%s: unknown BDA: %08x%04x", __FUNCTION__,
(bd_addr[0]<<24) + (bd_addr[1]<<16) + (bd_addr[2]<<8) + bd_addr[3],
(bd_addr[4]<< 8) + bd_addr[5]);
return FALSE;
}
return (p_dev_rec->remote_supports_secure_connections);
}
/*******************************************************************************
**
** Function BTM_ReadOobData
**
** Description This function is called to parse the OOB data payload
** received over OOB (non-Bluetooth) link
**
** Parameters: p_data - the location for OOB data
** eir_tag - The associated EIR tag to read the data.
** *p_len(output) - the length of the data with the given tag.
**
** Returns the beginning of the data with the given tag.
** NULL, if the tag is not found.
**
*******************************************************************************/
UINT8 * BTM_ReadOobData(UINT8 *p_data, UINT8 eir_tag, UINT8 *p_len)
{
UINT8 *p = p_data;
UINT16 max_len;
UINT8 len, type;
UINT8 *p_ret = NULL;
UINT8 ret_len = 0;
if (p_data)
{
STREAM_TO_UINT16(max_len, p);
if (max_len >= BTM_OOB_MANDATORY_SIZE)
{
if (BTM_EIR_OOB_BD_ADDR_TYPE == eir_tag)
{
p_ret = p; /* the location for bd_addr */
ret_len = BTM_OOB_BD_ADDR_SIZE;
}
else
{
p += BD_ADDR_LEN;
max_len -= BTM_OOB_MANDATORY_SIZE;
/* now the optional data in EIR format */
while (max_len > 0)
{
len = *p++; /* tag data len + 1 */
type = *p++;
if (eir_tag == type)
{
p_ret = p;
ret_len = len - 1;
break;
}
/* the data size of this tag is len + 1 (tag data len + 2) */
if (max_len > len)
{
max_len -= len;
max_len--;
len--;
p += len;
}
else
max_len = 0;
}
}
}
}
if (p_len)
*p_len = ret_len;
return p_ret;
}
/*******************************************************************************
**
** Function BTM_SetOutService
**
** Description This function is called to set the service for
** outgoing connections.
**
** If the profile/application calls BTM_SetSecurityLevel
** before initiating a connection, this function does not
** need to be called.
**
** Returns void
**
*******************************************************************************/
void BTM_SetOutService(BD_ADDR bd_addr, UINT8 service_id, UINT32 mx_chan_id)
{
tBTM_SEC_DEV_REC *p_dev_rec;
tBTM_SEC_SERV_REC *p_serv_rec = &btm_cb.sec_serv_rec[0];
btm_cb.p_out_serv = p_serv_rec;
p_dev_rec = btm_find_dev (bd_addr);
for (int i = 0; i < BTM_SEC_MAX_SERVICE_RECORDS; i++, p_serv_rec++)
{
if ((p_serv_rec->security_flags & BTM_SEC_IN_USE)
&& (p_serv_rec->service_id == service_id)
&& (p_serv_rec->orig_mx_chan_id == mx_chan_id))
{
BTM_TRACE_API("BTM_SetOutService p_out_serv id %d, psm 0x%04x, proto_id %d, chan_id %d",
p_serv_rec->service_id, p_serv_rec->psm, p_serv_rec->mx_proto_id, p_serv_rec->orig_mx_chan_id);
btm_cb.p_out_serv = p_serv_rec;
if (p_dev_rec)
p_dev_rec->p_cur_service = p_serv_rec;
break;
}
}
}
/************************************************************************
** 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 BOOLEAN
**
*******************************************************************************/
static BOOLEAN btm_sec_is_upgrade_possible(tBTM_SEC_DEV_REC *p_dev_rec, BOOLEAN is_originator)
{
UINT16 mtm_check = is_originator ? BTM_SEC_OUT_MITM : BTM_SEC_IN_MITM;
BOOLEAN is_possible = TRUE;
if (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN)
{
is_possible = FALSE;
if(p_dev_rec->p_cur_service)
{
BTM_TRACE_DEBUG ("%s() id: %d, link_key_typet: %d, rmt_io_caps: %d, chk flags: 0x%x, flags: 0x%x",
__func__, p_dev_rec->p_cur_service->service_id, p_dev_rec->link_key_type,
p_dev_rec->rmt_io_caps, mtm_check, p_dev_rec->p_cur_service->security_flags);
}
else
{
BTM_TRACE_DEBUG ("%s() link_key_typet: %d, rmt_io_caps: %d, chk flags: 0x%x",
__func__, p_dev_rec->link_key_type, p_dev_rec->rmt_io_caps, mtm_check);
}
/* 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, BOOLEAN 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) == TRUE)
{
BTM_TRACE_DEBUG ("need upgrade!! sec_flags:0x%x", p_dev_rec->sec_flags);
/* 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 */
tBTM_SP_UPGRADE evt_data;
memcpy (evt_data.bd_addr, p_dev_rec->bd_addr, BD_ADDR_LEN);
evt_data.upgrade = TRUE;
if (btm_cb.api.p_sp_callback)
(*btm_cb.api.p_sp_callback) (BTM_SP_UPGRADE_EVT, (tBTM_SP_EVT_DATA *)&evt_data);
BTM_TRACE_DEBUG ("evt_data.upgrade:0x%x", evt_data.upgrade);
if (evt_data.upgrade)
{
/* 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);
}
}
}
/*******************************************************************************
**
** 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 (BD_ADDR bd_addr, UINT16 psm, UINT16 handle,
CONNECTION_TYPE conn_type,
tBTM_SEC_CALLBACK *p_callback,
void *p_ref_data)
{
tBTM_SEC_DEV_REC *p_dev_rec;
tBTM_SEC_SERV_REC *p_serv_rec;
UINT16 security_required;
UINT16 old_security_required;
BOOLEAN old_is_originator;
tBTM_STATUS rc = BTM_SUCCESS;
BOOLEAN chk_acp_auth_done = FALSE;
BOOLEAN is_originator;
tBT_TRANSPORT transport = BT_TRANSPORT_BR_EDR; /* should check PSM range in LE connection oriented L2CAP connection */
#if (L2CAP_UCD_INCLUDED == TRUE)
if (conn_type & CONNECTION_TYPE_ORIG_MASK)
is_originator = TRUE;
else
is_originator = FALSE;
BTM_TRACE_DEBUG ("%s() conn_type: 0x%x, 0x%x", __func__, conn_type, p_ref_data);
#else
is_originator = conn_type;
BTM_TRACE_DEBUG ("%s() is_originator:%d, 0x%x", __func__, is_originator, p_ref_data);
#endif
/* Find or get oldest record */
p_dev_rec = btm_find_or_alloc_dev (bd_addr);
p_dev_rec->hci_handle = handle;
/* Find the service record for the PSM */
p_serv_rec = btm_sec_find_first_serv (conn_type, psm);
/* If there is no application registered with this PSM do not allow connection */
if (!p_serv_rec)
{
BTM_TRACE_WARNING ("%s() PSM: %d no application registerd", __func__, psm);
(*p_callback) (bd_addr, transport, p_ref_data, BTM_MODE_UNSUPPORTED);
return(BTM_MODE_UNSUPPORTED);
}
/* Services level0 by default have no security */
if ((btm_sec_is_serv_level0(psm)) && (!btm_cb.devcb.secure_connections_only))
{
(*p_callback) (bd_addr,transport, p_ref_data, BTM_SUCCESS_NO_SECURITY);
return(BTM_SUCCESS);
}
#if (L2CAP_UCD_INCLUDED == TRUE)
if ( conn_type & CONNECTION_TYPE_CONNLESS_MASK )
{
if (btm_cb.security_mode == BTM_SEC_MODE_SC)
{
security_required = btm_sec_set_serv_level4_flags (p_serv_rec->ucd_security_flags,
is_originator);
}
else
{
security_required = p_serv_rec->ucd_security_flags;
}
rc = BTM_CMD_STARTED;
if (is_originator)
{
if (((security_required & BTM_SEC_OUT_FLAGS) == 0) ||
((((security_required & BTM_SEC_OUT_FLAGS) == BTM_SEC_OUT_AUTHENTICATE) && (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED))) ||
((((security_required & BTM_SEC_OUT_FLAGS) == (BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_ENCRYPT)) && (p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED))) ||
((((security_required & BTM_SEC_OUT_FLAGS) == BTM_SEC_OUT_FLAGS) && (p_dev_rec->sec_flags & BTM_SEC_AUTHORIZED))) )
{
rc = BTM_SUCCESS;
}
}
else
{
if (((security_required & BTM_SEC_IN_FLAGS) == 0) ||
((((security_required & BTM_SEC_IN_FLAGS) == BTM_SEC_IN_AUTHENTICATE) && (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED))) ||
((((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_ENCRYPT)) && (p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED))) ||
((((security_required & BTM_SEC_IN_FLAGS) == BTM_SEC_IN_FLAGS) && (p_dev_rec->sec_flags & BTM_SEC_AUTHORIZED))) )
{
// 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 (p_callback)
(*p_callback) (bd_addr, transport, (void *)p_ref_data, BTM_SUCCESS);
return(BTM_SUCCESS);
}
}
else
#endif
{
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;
}
}
BTM_TRACE_DEBUG("%s: security_required 0x%04x, is_originator 0x%02x, psm 0x%04x",
__FUNCTION__, security_required, is_originator, psm);
if ((!is_originator) && (security_required & BTM_SEC_MODE4_LEVEL4))
{
BOOLEAN 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->remote_supports_secure_connections))
{
BTM_TRACE_DEBUG("%s: SC only service, local_support_for_sc %d",
"rmt_support_for_sc : %d -> fail pairing", __FUNCTION__,
local_supports_sc,
p_dev_rec->remote_supports_secure_connections);
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) )
{
BTM_TRACE_EVENT ("%s() - busy - PSM:%d delayed state: %s mode:%d, sm4:0x%x", __func__,
psm, btm_pair_state_descr(btm_cb.pairing_state), btm_cb.security_mode, p_dev_rec->sm4);
BTM_TRACE_EVENT ("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_UNDEFINED ||
btm_cb.security_mode == BTM_SEC_MODE_NONE ||
btm_cb.security_mode == BTM_SEC_MODE_SERVICE ||
btm_cb.security_mode == BTM_SEC_MODE_LINK) ||
(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) == FALSE)))
{
/* 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))) ||
((((security_required & BTM_SEC_OUT_FLAGS) == BTM_SEC_OUT_FLAGS) && btm_dev_authorized(p_dev_rec) && 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)) ||
(((security_required & BTM_SEC_IN_FLAGS) == BTM_SEC_IN_AUTHORIZE) && (btm_dev_authorized(p_dev_rec)||btm_serv_trusted(p_dev_rec, p_serv_rec))) ||
(((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_AUTHORIZE)) && ((btm_dev_authorized(p_dev_rec)||btm_serv_trusted(p_dev_rec, p_serv_rec)) && btm_dev_authenticated(p_dev_rec))) ||
(((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_ENCRYPT | BTM_SEC_IN_AUTHORIZE)) && ((btm_dev_authorized(p_dev_rec)||btm_serv_trusted(p_dev_rec, p_serv_rec)) && btm_dev_encrypted(p_dev_rec))) ||
(((security_required & BTM_SEC_IN_FLAGS) == BTM_SEC_IN_FLAGS) && btm_dev_encrypted(p_dev_rec) && (btm_dev_authorized(p_dev_rec)||btm_serv_trusted(p_dev_rec, p_serv_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 (p_callback)
(*p_callback) (bd_addr, transport, (void *)p_ref_data, BTM_SUCCESS);
return(BTM_SUCCESS);
}
}
btm_cb.sec_req_pending = TRUE;
return(BTM_CMD_STARTED);
}
/* Save pointer to service record */
p_dev_rec->p_cur_service = p_serv_rec;
/* 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_SP_DEBUG ||
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 */
BTM_TRACE_DEBUG("%s: (%s) remote features unknown!!sec_flags:0x%02x", __FUNCTION__,
(is_originator) ? "initiator" : "acceptor", p_dev_rec->sec_flags);
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);
old_security_required = p_dev_rec->security_required;
old_is_originator = p_dev_rec->is_originator;
p_dev_rec->security_required = security_required;
p_dev_rec->p_ref_data = p_ref_data;
p_dev_rec->is_originator = is_originator;
#if (L2CAP_UCD_INCLUDED == TRUE)
if ( conn_type & CONNECTION_TYPE_CONNLESS_MASK )
p_dev_rec->is_ucd = TRUE;
else
p_dev_rec->is_ucd = FALSE;
#endif
/* If there are multiple service records used through the same PSM */
/* leave security decision for the multiplexor on the top */
#if (L2CAP_UCD_INCLUDED == TRUE)
if (((btm_sec_find_next_serv (p_serv_rec)) != NULL)
&&(!( conn_type & CONNECTION_TYPE_CONNLESS_MASK ))) /* if not UCD */
#else
if ((btm_sec_find_next_serv (p_serv_rec)) != NULL)
#endif
{
BTM_TRACE_DEBUG ("no next_serv sm4:0x%x, chk:%d", p_dev_rec->sm4, chk_acp_auth_done);
if (!BTM_SEC_IS_SM4(p_dev_rec->sm4))
{
BTM_TRACE_EVENT ("Security Manager: l2cap_access_req PSM:%d postponed for multiplexer", psm);
/* pre-Lisbon: restore the old settings */
p_dev_rec->security_required = old_security_required;
p_dev_rec->is_originator = old_is_originator;
(*p_callback) (bd_addr, transport, p_ref_data, BTM_SUCCESS);
return(BTM_SUCCESS);
}
}
/* if the originator is using dynamic PSM in legacy mode, do not start any security process now
* The layer above L2CAP needs to carry out the security requirement after L2CAP connect
* response is received */
if (is_originator &&
((btm_cb.security_mode == BTM_SEC_MODE_UNDEFINED ||
btm_cb.security_mode == BTM_SEC_MODE_NONE ||
btm_cb.security_mode == BTM_SEC_MODE_SERVICE ||
btm_cb.security_mode == BTM_SEC_MODE_LINK) ||
!BTM_SEC_IS_SM4(p_dev_rec->sm4)) && (psm >= 0x1001))
{
BTM_TRACE_EVENT ("dynamic PSM:0x%x in legacy mode - postponed for upper layer", psm);
/* restore the old settings */
p_dev_rec->security_required = old_security_required;
p_dev_rec->is_originator = old_is_originator;
(*p_callback) (bd_addr, transport, p_ref_data, BTM_SUCCESS);
return(BTM_SUCCESS);
}
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(LOG_TAG, "%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 (p_dev_rec->last_author_service_id == BTM_SEC_NO_LAST_SERVICE_ID
|| p_dev_rec->last_author_service_id != p_dev_rec->p_cur_service->service_id)
{
/* Although authentication and encryption are per connection
** authorization is per access request. For example when serial connection
** is up and authorized and client requests to read file (access to other
** scn), we need to request user's permission again.
*/
p_dev_rec->sec_flags &= ~BTM_SEC_AUTHORIZED;
}
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", __FUNCTION__, 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);
}
}
BTM_TRACE_EVENT ("%s() PSM:%d Handle:%d State:%d Flags: 0x%x Required: 0x%x Service ID:%d",
__func__, psm, handle, p_dev_rec->sec_state, p_dev_rec->sec_flags,
p_dev_rec->security_required, p_dev_rec->p_cur_service->service_id);
if ((rc = btm_sec_execute_procedure (p_dev_rec)) != BTM_CMD_STARTED)
{
p_dev_rec->p_callback = NULL;
(*p_callback) (bd_addr, transport, p_dev_rec->p_ref_data, (UINT8)rc);
}
return(rc);
}
/*******************************************************************************
**
** 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 (BD_ADDR bd_addr, UINT16 psm, BOOLEAN is_originator,
UINT32 mx_proto_id, UINT32 mx_chan_id,
tBTM_SEC_CALLBACK *p_callback, void *p_ref_data)
{
tBTM_SEC_DEV_REC *p_dev_rec;
tBTM_SEC_SERV_REC *p_serv_rec;
tBTM_STATUS rc;
UINT16 security_required;
BOOLEAN transport = FALSE;/* should check PSM range in LE connection oriented L2CAP connection */
BTM_TRACE_DEBUG ("%s() is_originator: %d", __func__, is_originator);
/* Find or get oldest record */
p_dev_rec = btm_find_or_alloc_dev (bd_addr);
/* Find the service record for the PSM */
p_serv_rec = btm_sec_find_mx_serv (is_originator, psm, mx_proto_id, mx_chan_id);
/* If there is no application registered with this PSM do not allow connection */
if (!p_serv_rec)
{
if (p_callback)
(*p_callback) (bd_addr, transport, p_ref_data, BTM_MODE_UNSUPPORTED);
BTM_TRACE_ERROR ("Security Manager: MX service not found PSM:%d Proto:%d SCN:%d",
psm, mx_proto_id, mx_chan_id);
return BTM_NO_RESOURCES;
}
if ((btm_cb.security_mode == BTM_SEC_MODE_SC) && (!btm_sec_is_serv_level0(psm)))
{
security_required = btm_sec_set_serv_level4_flags (p_serv_rec->security_flags,
is_originator);
}
else
{
security_required = p_serv_rec->security_flags;
}
/* 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) )
{
BTM_TRACE_EVENT ("%s() service PSM:%d Proto:%d SCN:%d delayed state: %s", __func__,
psm, mx_proto_id, mx_chan_id, btm_pair_state_descr(btm_cb.pairing_state));
rc = BTM_CMD_STARTED;
if ((btm_cb.security_mode == BTM_SEC_MODE_UNDEFINED ||
btm_cb.security_mode == BTM_SEC_MODE_NONE ||
btm_cb.security_mode == BTM_SEC_MODE_SERVICE ||
btm_cb.security_mode == BTM_SEC_MODE_LINK) ||
(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) == FALSE)))
{
/* 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_AUTHORIZE) && (btm_dev_authorized(p_dev_rec)||btm_serv_trusted(p_dev_rec, p_serv_rec))) ||
(((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_AUTHORIZE | BTM_SEC_IN_AUTHENTICATE)) && ((btm_dev_authorized(p_dev_rec)||btm_serv_trusted(p_dev_rec, p_serv_rec)) && btm_dev_authenticated(p_dev_rec))) ||
(((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_AUTHORIZE | BTM_SEC_IN_ENCRYPT)) && ((btm_dev_authorized(p_dev_rec)||btm_serv_trusted(p_dev_rec, p_serv_rec))&& btm_dev_encrypted(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)
{
BTM_TRACE_EVENT("%s: allow to bypass, checking authorization", __FUNCTION__);
/* the security in BTM_SEC_IN_FLAGS is fullfilled so far, check the requirements in */
/* btm_sec_execute_procedure */
if ((is_originator && (p_serv_rec->security_flags & BTM_SEC_OUT_AUTHORIZE)) ||
(!is_originator && (p_serv_rec->security_flags & BTM_SEC_IN_AUTHORIZE)))
{
BTM_TRACE_EVENT("%s: still need authorization", __FUNCTION__);
rc = BTM_CMD_STARTED;
}
}
/* Check whether there is a pending security procedure, if so we should always queue */
/* the new security request */
if (p_dev_rec->sec_state != BTM_SEC_STATE_IDLE)
{
BTM_TRACE_EVENT("%s: There is a pending security procedure", __FUNCTION__);
rc = BTM_CMD_STARTED;
}
if (rc == BTM_CMD_STARTED)
{
BTM_TRACE_EVENT("%s: call btm_sec_queue_mx_request", __FUNCTION__);
btm_sec_queue_mx_request (bd_addr, psm, is_originator, mx_proto_id,
mx_chan_id, p_callback, p_ref_data);
}
else /* rc == BTM_SUCCESS */
{
/* access granted */
if (p_callback)
{
(*p_callback) (bd_addr, transport, p_ref_data, (UINT8)rc);
}
}
BTM_TRACE_EVENT("%s: return with rc = 0x%02x in delayed state %s", __FUNCTION__, rc,
btm_pair_state_descr(btm_cb.pairing_state));
return rc;
}
if ((!is_originator) && ((security_required & BTM_SEC_MODE4_LEVEL4) ||
(btm_cb.security_mode == BTM_SEC_MODE_SC)))
{
BOOLEAN 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->remote_supports_secure_connections))
{
BTM_TRACE_DEBUG("%s: SC only service,local_support_for_sc %d,",
"remote_support_for_sc %d: fail pairing",__FUNCTION__,
local_supports_sc, p_dev_rec->remote_supports_secure_connections);
if (p_callback)
(*p_callback) (bd_addr, transport, (void *)p_ref_data,
BTM_MODE4_LEVEL4_NOT_SUPPORTED);
return (BTM_MODE4_LEVEL4_NOT_SUPPORTED);
}
}
p_dev_rec->p_cur_service = p_serv_rec;
p_dev_rec->security_required = security_required;
if (btm_cb.security_mode == BTM_SEC_MODE_SP ||
btm_cb.security_mode == BTM_SEC_MODE_SP_DEBUG ||
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", __FUNCTION__, p_dev_rec->sec_flags);
}
else
{
/* If we already have a link key, check if that link key is good enough */
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;
/* Although authentication and encryption are per connection */
/* authorization is per access request. For example when serial connection */
/* is up and authorized and client requests to read file (access to other */
/* scn, we need to request user's permission again. */
p_dev_rec->sec_flags &= ~(BTM_SEC_AUTHORIZED);
BTM_TRACE_EVENT ("%s() proto_id:%d chan_id:%d State:%d Flags:0x%x Required:0x%x Service ID:%d",
__func__, mx_proto_id, mx_chan_id, p_dev_rec->sec_state, p_dev_rec->sec_flags,
p_dev_rec->security_required, p_dev_rec->p_cur_service->service_id);
if ((rc = btm_sec_execute_procedure (p_dev_rec)) != BTM_CMD_STARTED)
{
if (p_callback)
{
p_dev_rec->p_callback = NULL;
(*p_callback) (bd_addr,transport, p_ref_data, (UINT8)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 (UINT8 *bda, UINT8 *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;
}
/* Security guys wants us not to allow connection from not paired devices */
/* Check if connection is allowed for only paired devices */
if (btm_cb.connect_only_paired)
{
if (!p_dev_rec || !(p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_AUTHED))
{
BTM_TRACE_EVENT ("Security Manager: connect request from non-paired device");
btsnd_hcic_reject_conn (bda, HCI_ERR_HOST_REJECT_DEVICE);
return;
}
}
#if BTM_ALLOW_CONN_IF_NONDISCOVER == FALSE
/* If non-discoverable, only allow known devices to connect */
if (btm_cb.btm_inq_vars.discoverable_mode == BTM_NON_DISCOVERABLE)
{
if (!p_dev_rec)
{
BTM_TRACE_EVENT ("Security Manager: connect request from not paired device");
btsnd_hcic_reject_conn (bda, HCI_ERR_HOST_REJECT_DEVICE);
return;
}
}
#endif
if ((btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
&&(btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)
&&(!memcmp (btm_cb.pairing_bda, bda, BD_ADDR_LEN)))
{
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 */
memcpy (btm_cb.connecting_bda, bda, BD_ADDR_LEN);
memcpy (btm_cb.connecting_dc, dc, DEV_CLASS_LEN);
if (l2c_link_hci_conn_req (bda))
{
if (!p_dev_rec)
{
/* accept the connection -> allocate a device record */
p_dev_rec = btm_sec_alloc_dev (bda);
}
if (p_dev_rec)
{
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.
*/
if ((p_dev_rec = btm_find_dev (btm_cb.pairing_bda)) != 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 (UINT8 *p)
{
UINT8 status;
STREAM_TO_UINT8 (status, p);
BTM_TRACE_EVENT ("btm_create_conn_cancel_complete(): in State: %s status:%d",
btm_pair_state_descr(btm_cb.pairing_state), status);
/* 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 (NULL);
}
/* 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_bda_to_acl(p_e->bd_addr, p_e->transport) != NULL)
{
if (p_e->psm != 0)
{
BTM_TRACE_EVENT("%s PSM:0x%04x Is_Orig:%u mx_proto_id:%u mx_chan_id:%u",
__FUNCTION__, p_e->psm, p_e->is_orig,
p_e->mx_proto_id, p_e->mx_chan_id);
btm_sec_mx_access_request (p_e->bd_addr, p_e->psm, p_e->is_orig,
p_e->mx_proto_id, p_e->mx_chan_id,
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_init
**
** Description This function is on the SEC startup
**
** Returns void
**
*******************************************************************************/
void btm_sec_init (UINT8 sec_mode)
{
btm_cb.security_mode = sec_mode;
memset (btm_cb.pairing_bda, 0xff, BD_ADDR_LEN);
btm_cb.max_collision_delay = BTM_SEC_MAX_COLLISION_DELAY;
}
/*******************************************************************************
**
** Function btm_sec_device_down
**
** Description This function should be called when device is disabled or
** turned off
**
** Returns void
**
*******************************************************************************/
void btm_sec_device_down (void)
{
BTM_TRACE_EVENT ("%s() State: %s", __func__, btm_pair_state_descr(btm_cb.pairing_state));
btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
}
/*******************************************************************************
**
** 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 = BTM_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);
}
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 (BD_ADDR 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;
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)
{
tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr(p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR);
if (p_lcb && (p_lcb->link_state == LST_CONNECTED || p_lcb->link_state == LST_CONNECTING))
{
BTM_TRACE_WARNING("%s Connection already exists", __func__);
return BTM_CMD_STARTED;
}
/* Make sure an L2cap link control block is available */
if (!p_lcb && (p_lcb = l2cu_allocate_lcb (p_dev_rec->bd_addr, TRUE, BT_TRANSPORT_BR_EDR)) == NULL)
{
BTM_TRACE_WARNING ("Security Manager: failed allocate LCB [%02x%02x%02x%02x%02x%02x]",
p_dev_rec->bd_addr[0], p_dev_rec->bd_addr[1], p_dev_rec->bd_addr[2],
p_dev_rec->bd_addr[3], p_dev_rec->bd_addr[4], p_dev_rec->bd_addr[5]);
return(BTM_NO_RESOURCES);
}
/* set up the control block to indicated dedicated bonding */
btm_cb.pairing_flags |= BTM_PAIR_FLAGS_DISC_WHEN_DONE;
if (l2cu_create_conn(p_lcb, BT_TRANSPORT_BR_EDR) == FALSE)
{
BTM_TRACE_WARNING ("Security Manager: failed create [%02x%02x%02x%02x%02x%02x]",
p_dev_rec->bd_addr[0], p_dev_rec->bd_addr[1], p_dev_rec->bd_addr[2],
p_dev_rec->bd_addr[3], p_dev_rec->bd_addr[4], p_dev_rec->bd_addr[5]);
l2cu_release_lcb(p_lcb);
return(BTM_NO_RESOURCES);
}
btm_acl_update_busy_level (BTM_BLI_PAGE_EVT);
BTM_TRACE_DEBUG ("Security Manager: btm_sec_dd_create_conn [%02x%02x%02x%02x%02x%02x]",
p_dev_rec->bd_addr[0], p_dev_rec->bd_addr[1], p_dev_rec->bd_addr[2],
p_dev_rec->bd_addr[3], p_dev_rec->bd_addr[4], p_dev_rec->bd_addr[5]);
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 = 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 (UINT8 *p_bd_addr, UINT8 *p_bd_name, UINT8 status)
{
tBTM_SEC_DEV_REC *p_dev_rec;
int i;
DEV_CLASS dev_class;
UINT8 old_sec_state;
BTM_TRACE_EVENT ("btm_sec_rmt_name_request_complete");
if (((p_bd_addr == NULL) && !BTM_ACL_IS_CONNECTED(btm_cb.connecting_bda))
|| ((p_bd_addr != NULL) && !BTM_ACL_IS_CONNECTED(p_bd_addr)))
{
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
{
list_node_t *node = list_foreach(btm_cb.sec_dev_rec, is_state_getting_name, NULL);
if (node != NULL) {
p_dev_rec = list_node(node);
p_bd_addr = p_dev_rec->bd_addr;
} else {
p_dev_rec = NULL;
}
}
/* Commenting out trace due to obf/compilation problems.
*/
#if (BT_USE_TRACES == TRUE)
if (!p_bd_name)
p_bd_name = (UINT8 *)"";
if (p_dev_rec)
{
BTM_TRACE_EVENT ("%s PairState: %s RemName: %s status: %d State:%d p_dev_rec: 0x%08x ", __func__,
btm_pair_state_descr (btm_cb.pairing_state), p_bd_name,
status, p_dev_rec->sec_state, p_dev_rec);
} else {
BTM_TRACE_EVENT ("%s PairState: %s RemName: %s status: %d", __func__,
btm_pair_state_descr (btm_cb.pairing_state), p_bd_name,
status);
}
#endif
if (p_dev_rec)
{
old_sec_state = p_dev_rec->sec_state;
if (status == HCI_SUCCESS)
{
strlcpy((char *)p_dev_rec->sec_bd_name, (char *)p_bd_name, BTM_MAX_REM_BD_NAME_LEN);
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
{
/* 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 {
dev_class[0] = 0;
dev_class[1] = 0;
dev_class[2] = 0;
/* 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, dev_class, (UINT8 *)"");
}
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
&& (memcmp (btm_cb.pairing_bda, p_bd_addr, BD_ADDR_LEN) == 0) )
{
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->p_cur_service==NULL) ? FALSE
: (p_dev_rec->p_cur_service->security_flags & 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 && memcmp (btm_cb.pairing_bda, p_bd_addr, BD_ADDR_LEN) == 0)
{
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);
if (btm_cb.api.p_auth_complete_callback)
(*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class,
p_dev_rec->sec_bd_name, status);
return;
}
/* 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",__FUNCTION__,
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);
if (btm_cb.api.p_auth_complete_callback)
(*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class,
p_dev_rec->sec_bd_name, HCI_ERR_MEMORY_FULL);
}
}
return;
} else {
BTM_TRACE_WARNING ("%s: wrong BDA, retry with pairing BDA", __func__);
BTM_ReadRemoteDeviceName (btm_cb.pairing_bda, NULL, BT_TRANSPORT_BR_EDR);
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 == BTM_SEC_INVALID_HANDLE)
return;
p_dev_rec->link_key_not_sent = FALSE;
btm_send_link_key_notif(p_dev_rec);
/* If its not us who perform authentication, we should tell stackserver */
/* that some authentication has been completed */
/* This is required when different entities receive link notification and auth complete */
if (!(p_dev_rec->security_required & BTM_SEC_OUT_AUTHENTICATE))
{
if (btm_cb.api.p_auth_complete_callback)
(*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,
p_dev_rec->dev_class,
p_dev_rec->sec_bd_name, HCI_SUCCESS);
}
}
/* 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 */
status = (UINT8)btm_sec_execute_procedure (p_dev_rec);
/* If result is pending reply from the user or from the device is pending */
if (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, 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 (UINT8 *p)
{
tBTM_SEC_DEV_REC *p_dev_rec;
BD_ADDR 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 (UINT8 *p)
{
tBTM_SP_IO_REQ evt_data;
UINT8 err_code = 0;
tBTM_SEC_DEV_REC *p_dev_rec;
BOOLEAN is_orig = TRUE;
UINT8 callback_rc = BTM_SUCCESS;
STREAM_TO_BDADDR (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;
evt_data.oob_data = BTM_OOB_NONE;
evt_data.auth_req = BTM_DEFAULT_AUTH_REQ;
BTM_TRACE_EVENT("%s: State: %s", __FUNCTION__, btm_pair_state_descr(btm_cb.pairing_state));
p_dev_rec = btm_find_or_alloc_dev (evt_data.bd_addr);
BTM_TRACE_DEBUG("%s:Security mode: %d, Num Read Remote Feat pages: %d", __FUNCTION__,
btm_cb.security_mode, p_dev_rec->num_read_pages);
if ((btm_cb.security_mode == BTM_SEC_MODE_SC) && (p_dev_rec->num_read_pages == 0))
{
BTM_TRACE_EVENT("%s: Device security mode is SC only.",
"To continue need to know remote features.", __FUNCTION__);
p_dev_rec->remote_features_needed = TRUE;
return;
}
p_dev_rec->sm4 |= BTM_SM4_TRUE;
BTM_TRACE_EVENT("%s: State: %s Flags: 0x%04x p_cur_service: 0x%08x",
__FUNCTION__, btm_pair_state_descr(btm_cb.pairing_state),
btm_cb.pairing_flags, p_dev_rec->p_cur_service);
if (p_dev_rec->p_cur_service)
{
BTM_TRACE_EVENT("%s: cur_service psm: 0x%04x, security_flags: 0x%04x",
__FUNCTION__, p_dev_rec->p_cur_service->psm,
p_dev_rec->p_cur_service->security_flags);
}
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_DEFAULT_DD_AUTH_REQ;
}
break;
/* initiator, at this point it is expected to be dedicated bonding
initiated by local device */
case BTM_PAIR_STATE_WAIT_PIN_REQ:
if (!memcmp (evt_data.bd_addr, btm_cb.pairing_bda, BD_ADDR_LEN))
{
evt_data.auth_req = BTM_DEFAULT_DD_AUTH_REQ;
}
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", __FUNCTION__,
btm_cb.pairing_state);
break;
}
if (btm_cb.pairing_disabled)
{
/* pairing is not allowed */
BTM_TRACE_DEBUG("%s: Pairing is not allowed -> fail pairing.", __FUNCTION__);
err_code = HCI_ERR_PAIRING_NOT_ALLOWED;
}
else if (btm_cb.security_mode == BTM_SEC_MODE_SC)
{
BOOLEAN local_supports_sc = controller_get_interface()->supports_secure_connections();
/* device in Secure Connections Only mode */
if (!(local_supports_sc) || !(p_dev_rec->remote_supports_secure_connections))
{
BTM_TRACE_DEBUG("%s: SC only service, local_support_for_sc %d,",
" remote_support_for_sc 0x%02x -> fail pairing", __FUNCTION__,
local_supports_sc, p_dev_rec->remote_supports_secure_connections);
err_code = HCI_ERR_PAIRING_NOT_ALLOWED;
}
}
if (err_code != 0)
{
/* coverity[uninit_use_in_call]
Event uninit_use_in_call: Using uninitialized element of array "evt_data.bd_addr" in call to function "memcmp"
False-positive: evt_data.bd_addr is set at the beginning with: STREAM_TO_BDADDR (evt_data.bd_addr, p);
*/
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 p_cur_service */
if (!(btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) &&
p_dev_rec->p_cur_service &&
(p_dev_rec->p_cur_service->security_flags & 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->p_cur_service->security_flags &
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);
memcpy (btm_cb.pairing_bda, evt_data.bd_addr, BD_ADDR_LEN);
/* coverity[uninit_use_in_call]
Event uninit_use_in_call: Using uninitialized element of array "evt_data.bd_addr" in call to function "memcmp"
False-positive: False-positive: evt_data.bd_addr is set at the beginning with: STREAM_TO_BDADDR (evt_data.bd_addr, p);
*/
if (!memcmp (evt_data.bd_addr, btm_cb.connecting_bda, BD_ADDR_LEN))
memcpy (p_dev_rec->dev_class, btm_cb.connecting_dc, DEV_CLASS_LEN);
btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_LOCAL_IOCAPS);
callback_rc = BTM_SUCCESS;
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... */
callback_rc = (*btm_cb.api.p_sp_callback) (BTM_SP_IO_REQ_EVT, (tBTM_SP_EVT_DATA *)&evt_data);
}
if ((callback_rc == BTM_SUCCESS) || (BTM_OOB_UNKNOWN != evt_data.oob_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",
__FUNCTION__, 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",
__FUNCTION__, 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 (UINT8 *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)
{
memcpy (btm_cb.pairing_bda, evt_data.bd_addr, BD_ADDR_LEN);
btm_sec_change_pairing_state (BTM_PAIR_STATE_INCOMING_SSP);
/* Make sure we reset the trusted mask to help against attacks */
BTM_SEC_CLR_TRUSTED_DEVICE(p_dev_rec->trusted_mask);
/* 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 */
/* coverity[uninit_use_in_call]
Event uninit_use_in_call: Using uninitialized element of array "evt_data.bd_addr" in call to function "memcmp"
FALSE-POSITIVE error from Coverity test-tool. evt_data.bd_addr is set at the beginning with: STREAM_TO_BDADDR (evt_data.bd_addr, p);
*/
if (!memcmp (evt_data.bd_addr, btm_cb.connecting_bda, BD_ADDR_LEN))
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, UINT8 *p)
{
tBTM_STATUS status = BTM_ERR_PROCESSING;
tBTM_SP_EVT_DATA evt_data;
UINT8 *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);
BTM_TRACE_EVENT ("btm_proc_sp_req_evt() BDA: %08x%04x event: 0x%x, State: %s",
(p_bda[0]<<24) + (p_bda[1]<<16) + (p_bda[2]<<8) + p_bda[3], (p_bda[4] << 8) + p_bda[5],
event, btm_pair_state_descr(btm_cb.pairing_state));
if ( ((p_dev_rec = btm_find_dev (p_bda)) != NULL)
&& (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
&& (memcmp (btm_cb.pairing_bda, p_bda, BD_ADDR_LEN) == 0) )
{
memcpy (evt_data.cfm_req.bd_addr, p_dev_rec->bd_addr, BD_ADDR_LEN);
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);
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);
evt_data.cfm_req.just_works = TRUE;
/* process user confirm req in association with the auth_req param */
#if (BTM_LOCAL_IO_CAPS == BTM_IO_CAP_IO)
if ( (p_dev_rec->rmt_io_caps == BTM_IO_CAP_IO)
&& (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)) )
{
/* Both devices are DisplayYesNo and one or both devices want to authenticate
-> use authenticated link key */
evt_data.cfm_req.just_works = FALSE;
}
#endif
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;
#if (BTM_LOCAL_IO_CAPS != BTM_IO_CAP_NONE)
case BTM_SP_KEY_REQ_EVT:
/* HCI_USER_PASSKEY_REQUEST_EVT */
btm_sec_change_pairing_state (BTM_PAIR_STATE_KEY_ENTRY);
break;
#endif
}
if (btm_cb.api.p_sp_callback)
{
status = (*btm_cb.api.p_sp_callback) (event, (tBTM_SP_EVT_DATA *)&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 == TRUE) )
{
/* 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);
}
#if (BTM_LOCAL_IO_CAPS != BTM_IO_CAP_NONE)
else if (event == BTM_SP_KEY_REQ_EVT)
{
BTM_PasskeyReqReply(status, p_bda, 0);
}
#endif
return;
}
/* Something bad. we can only fail this connection */
btm_cb.acl_disc_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. */
if (NULL != (p_dev_rec = btm_find_dev (p_bda)) )
{
btm_sec_disconnect (p_dev_rec->hci_handle, HCI_ERR_AUTH_FAILURE);
}
}
#if (BTM_LOCAL_IO_CAPS != BTM_IO_CAP_NONE)
else
{
btsnd_hcic_user_passkey_neg_reply(p_bda);
}
#endif
}
/*******************************************************************************
**
** Function btm_keypress_notif_evt
**
** Description This function is called when a key press notification is
** received
**
** Returns void
**
*******************************************************************************/
void btm_keypress_notif_evt (UINT8 *p)
{
tBTM_SP_KEYPRESS evt_data;
UINT8 *p_bda;
/* parse & report BTM_SP_KEYPRESS_EVT */
if (btm_cb.api.p_sp_callback)
{
p_bda = evt_data.bd_addr;
STREAM_TO_BDADDR (p_bda, p);
evt_data.notif_type = *p;
(*btm_cb.api.p_sp_callback) (BTM_SP_KEYPRESS_EVT, (tBTM_SP_EVT_DATA *)&evt_data);
}
}
/*******************************************************************************
**
** Function btm_simple_pair_complete
**
** Description This function is called when simple pairing process is
** complete
**
** Returns void
**
*******************************************************************************/
void btm_simple_pair_complete (UINT8 *p)
{
tBTM_SP_COMPLT evt_data;
tBTM_SEC_DEV_REC *p_dev_rec;
UINT8 status;
BOOLEAN disc = FALSE;
status = *p++;
STREAM_TO_BDADDR (evt_data.bd_addr, p);
if ((p_dev_rec = btm_find_dev (evt_data.bd_addr)) == NULL)
{
BTM_TRACE_ERROR ("btm_simple_pair_complete() with unknown BDA: %08x%04x",
(evt_data.bd_addr[0]<<24) + (evt_data.bd_addr[1]<<16) + (evt_data.bd_addr[2]<<8) + evt_data.bd_addr[3],
(evt_data.bd_addr[4] << 8) + evt_data.bd_addr[5]);
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);
evt_data.status = BTM_ERR_PROCESSING;
if (status == HCI_SUCCESS)
{
evt_data.status = BTM_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_queue(btm_cb.pairing_timer, BT_1SEC_TIMEOUT_MS,
btm_sec_pairing_timeout, NULL,
btu_general_alarm_queue);
}
else if (memcmp (btm_cb.pairing_bda, evt_data.bd_addr, BD_ADDR_LEN) == 0)
{
/* 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;
}
/* Let the pairing state stay active, p_auth_complete_callback will report the failure */
memcpy (evt_data.bd_addr, p_dev_rec->bd_addr, BD_ADDR_LEN);
memcpy (evt_data.dev_class, p_dev_rec->dev_class, DEV_CLASS_LEN);
if (btm_cb.api.p_sp_callback)
(*btm_cb.api.p_sp_callback) (BTM_SP_COMPLT_EVT, (tBTM_SP_EVT_DATA *)&evt_data);
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);
}
}
}
/*******************************************************************************
**
** 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 (UINT8 *p)
{
UINT8 *p_bda;
tBTM_SP_RMT_OOB evt_data;
tBTM_SEC_DEV_REC *p_dev_rec;
BT_OCTET16 c;
BT_OCTET16 r;
p_bda = evt_data.bd_addr;
STREAM_TO_BDADDR (p_bda, p);
BTM_TRACE_EVENT ("btm_rem_oob_req() BDA: %02x:%02x:%02x:%02x:%02x:%02x",
p_bda[0], p_bda[1], p_bda[2], p_bda[3], p_bda[4], p_bda[5]);
if ( (NULL != (p_dev_rec = btm_find_dev (p_bda))) &&
btm_cb.api.p_sp_callback)
{
memcpy (evt_data.bd_addr, p_dev_rec->bd_addr, BD_ADDR_LEN);
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);
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(TRUE, p_bda, c, r);
}
return;
}
/* something bad. we can only fail this connection */
btm_cb.acl_disc_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 *p)
{
tBTM_SP_LOC_OOB evt_data;
UINT8 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, p);
STREAM_TO_ARRAY16(evt_data.r, p);
}
else
evt_data.status = BTM_ERR_PROCESSING;
if (btm_cb.api.p_sp_callback)
(*btm_cb.api.p_sp_callback) (BTM_SP_LOC_OOB_EVT, (tBTM_SP_EVT_DATA *)&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 handle)
{
tBTM_SEC_DEV_REC *p_dev_rec;
if (!btm_cb.collision_start_time)
btm_cb.collision_start_time = time_get_os_boottime_ms();
if ((time_get_os_boottime_ms() - btm_cb.collision_start_time) < btm_cb.max_collision_delay)
{
if (handle == BTM_SEC_INVALID_HANDLE)
{
if ((p_dev_rec = btm_sec_find_dev_by_sec_state (BTM_SEC_STATE_AUTHENTICATING)) == 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 = 0;
btm_cb.p_collided_dev_rec = p_dev_rec;
alarm_set_on_queue(btm_cb.sec_collision_timer, BT_1SEC_TIMEOUT_MS,
btm_sec_collision_timeout, NULL,
btu_general_alarm_queue);
}
}
}
/*******************************************************************************
**
** Function btm_sec_auth_complete
**
** Description This function is when authentication of the connection is
** completed by the LM
**
** Returns void
**
*******************************************************************************/
void btm_sec_auth_complete (UINT16 handle, UINT8 status)
{
UINT8 old_sm4;
tBTM_PAIRING_STATE old_state = btm_cb.pairing_state;
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev_by_handle (handle);
BOOLEAN are_bonding = FALSE;
/* Commenting out trace due to obf/compilation problems.
*/
#if (BT_USE_TRACES == TRUE)
if (p_dev_rec)
{
BTM_TRACE_EVENT ("Security Manager: auth_complete PairState: %s handle:%u status:%d dev->sec_state: %u Bda:%08x, RName:%s",
btm_pair_state_descr (btm_cb.pairing_state),
handle, status,
p_dev_rec->sec_state,
(p_dev_rec->bd_addr[2]<<24)+(p_dev_rec->bd_addr[3]<<16)+(p_dev_rec->bd_addr[4]<<8)+p_dev_rec->bd_addr[5],
p_dev_rec->sec_bd_name);
}
else
{
BTM_TRACE_EVENT ("Security Manager: auth_complete PairState: %s handle:%u status:%d",
btm_pair_state_descr (btm_cb.pairing_state),
handle, status);
}
#endif
/* For transaction collision we need to wait and repeat. There is no need */
/* for random timeout because only slave should receive the result */
if ((status == HCI_ERR_LMP_ERR_TRANS_COLLISION) || (status == HCI_ERR_DIFF_TRANSACTION_COLLISION))
{
btm_sec_auth_collision(handle);
return;
}
btm_cb.collision_start_time = 0;
btm_restore_mode();
/* Check if connection was made just to do bonding. If we authenticate
the connection that is up, this is the last event received.
*/
if (p_dev_rec
&& (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)
&& !(btm_cb.pairing_flags & BTM_PAIR_FLAGS_DISC_WHEN_DONE))
{
p_dev_rec->security_required &= ~BTM_SEC_OUT_AUTHENTICATE;
l2cu_start_post_bond_timer (p_dev_rec->hci_handle);
}
if (!p_dev_rec)
return;
/* keep the old sm4 flag and clear the retry bit in control block */
old_sm4 = p_dev_rec->sm4;
p_dev_rec->sm4 &= ~BTM_SM4_RETRY;
if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
&& (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)
&& (memcmp (p_dev_rec->bd_addr, btm_cb.pairing_bda, BD_ADDR_LEN) == 0) )
are_bonding = TRUE;
if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
&& (memcmp (p_dev_rec->bd_addr, btm_cb.pairing_bda, BD_ADDR_LEN) == 0) )
btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
if (p_dev_rec->sec_state != BTM_SEC_STATE_AUTHENTICATING)
{
if ( (btm_cb.api.p_auth_complete_callback && status != HCI_SUCCESS)
&& (old_state != BTM_PAIR_STATE_IDLE) )
{
(*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,
p_dev_rec->dev_class,
p_dev_rec->sec_bd_name, status);
}
return;
}
/* There can be a race condition, when we are starting authentication and
** the peer device is doing encryption.
** If first we receive encryption change up, then initiated authentication
** can not be performed. According to the spec we can not do authentication
** on the encrypted link, so device is correct.
*/
if ((status == HCI_ERR_COMMAND_DISALLOWED)
&& ((p_dev_rec->sec_flags & (BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED)) ==
(BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED)))
{
status = HCI_SUCCESS;
}
/* Currently we do not notify user if it is a keyboard which connects */
/* User probably Disabled the keyboard while it was asleap. Let her try */
if (btm_cb.api.p_auth_complete_callback)
{
/* report the suthentication status */
if (old_state != BTM_PAIR_STATE_IDLE)
(*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,
p_dev_rec->dev_class,
p_dev_rec->sec_bd_name, status);
}
p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;
/* If this is a bonding procedure can disconnect the link now */
if (are_bonding)
{
p_dev_rec->security_required &= ~BTM_SEC_OUT_AUTHENTICATE;
if (status != HCI_SUCCESS)
{
if(((status != HCI_ERR_PEER_USER) && (status != HCI_ERR_CONN_CAUSE_LOCAL_HOST)))
btm_sec_send_hci_disconnect (p_dev_rec, HCI_ERR_PEER_USER, p_dev_rec->hci_handle);
}
else
{
BTM_TRACE_DEBUG ("TRYING TO DECIDE IF CAN USE SMP_BR_CHNL");
if (p_dev_rec->new_encryption_key_is_p256 && (btm_sec_use_smp_br_chnl(p_dev_rec))
/* no LE keys are available, do deriving */
&& (!(p_dev_rec->sec_flags &BTM_SEC_LE_LINK_KEY_KNOWN) ||
/* or BR key is higher security than existing LE keys */
(!(p_dev_rec->sec_flags & BTM_SEC_LE_LINK_KEY_AUTHED) &&
(p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_AUTHED))))
{
BTM_TRACE_DEBUG ("link encrypted afer dedic bonding can use SMP_BR_CHNL");
if (btm_sec_is_master(p_dev_rec))
{
// Encryption is required to start SM over BR/EDR
// indicate that this is encryption after authentication
BTM_SetEncryption(p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR, NULL, NULL, 0);
}
}
l2cu_start_post_bond_timer (p_dev_rec->hci_handle);
}
return;
}
/* If authentication failed, notify the waiting layer */
if (status != HCI_SUCCESS)
{
if ((old_sm4 & BTM_SM4_RETRY) == 0)
{
/* allow retry only once */
if (status == HCI_ERR_LMP_ERR_TRANS_COLLISION)
{
/* not retried yet. set the retry bit */
p_dev_rec->sm4 |= BTM_SM4_RETRY;
BTM_TRACE_DEBUG ("Collision retry sm4:x%x sec_flags:0x%x", p_dev_rec->sm4, p_dev_rec->sec_flags);
}
/* this retry for missing key is for Lisbon or later only.
* Legacy device do not need this. the controller will drive the retry automatically */
else if (HCI_ERR_KEY_MISSING == status && BTM_SEC_IS_SM4(p_dev_rec->sm4))
{
/* not retried yet. set the retry bit */
p_dev_rec->sm4 |= BTM_SM4_RETRY;
p_dev_rec->sec_flags &= ~BTM_SEC_LINK_KEY_KNOWN;
BTM_TRACE_DEBUG ("Retry for missing key sm4:x%x sec_flags:0x%x", 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); */
}
if (p_dev_rec->sm4 & BTM_SM4_RETRY)
{
btm_sec_execute_procedure (p_dev_rec);
return;
}
}
btm_sec_dev_rec_cback_event (p_dev_rec, BTM_ERR_PROCESSING, FALSE);
if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_DISC_WHEN_DONE)
{
btm_sec_send_hci_disconnect (p_dev_rec, HCI_ERR_AUTH_FAILURE, p_dev_rec->hci_handle);
}
return;
}
p_dev_rec->sec_flags |= BTM_SEC_AUTHENTICATED;
if (p_dev_rec->pin_code_length >= 16 ||
p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB ||
p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256) {
// If we have MITM protection we have a higher level of security than
// provided by 16 digits PIN
p_dev_rec->sec_flags |= BTM_SEC_16_DIGIT_PIN_AUTHED;
}
/* Authentication succeeded, execute the next security procedure, if any */
status = btm_sec_execute_procedure (p_dev_rec);
/* If there is no next procedure, or procedure failed to start, notify the caller */
if (status != BTM_CMD_STARTED)
btm_sec_dev_rec_cback_event (p_dev_rec, status, FALSE);
}
/*******************************************************************************
**
** Function btm_sec_encrypt_change
**
** Description This function is when encryption of the connection is
** completed by the LM
**
** Returns void
**
*******************************************************************************/
void btm_sec_encrypt_change (UINT16 handle, UINT8 status, UINT8 encr_enable)
{
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev_by_handle (handle);
#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
tACL_CONN *p_acl = NULL;
UINT8 acl_idx = btm_handle_to_acl_index(handle);
#endif
BTM_TRACE_EVENT ("Security Manager: encrypt_change status:%d State:%d, encr_enable = %d",
status, (p_dev_rec) ? p_dev_rec->sec_state : 0, encr_enable);
BTM_TRACE_DEBUG ("before update p_dev_rec->sec_flags=0x%x", (p_dev_rec) ? p_dev_rec->sec_flags : 0 );
/* For transaction collision we need to wait and repeat. There is no need */
/* for random timeout because only slave should receive the result */
if ((status == HCI_ERR_LMP_ERR_TRANS_COLLISION) ||
(status == HCI_ERR_DIFF_TRANSACTION_COLLISION))
{
btm_sec_auth_collision(handle);
return;
}
btm_cb.collision_start_time = 0;
if (!p_dev_rec)
return;
if ((status == HCI_SUCCESS) && encr_enable)
{
if (p_dev_rec->hci_handle == handle) {
p_dev_rec->sec_flags |= (BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED);
if (p_dev_rec->pin_code_length >= 16 ||
p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB ||
p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256) {
p_dev_rec->sec_flags |= BTM_SEC_16_DIGIT_PIN_AUTHED;
}
}
else
{
p_dev_rec->sec_flags |= (BTM_SEC_LE_AUTHENTICATED | BTM_SEC_LE_ENCRYPTED);
}
}
/* It is possible that we decrypted the link to perform role switch */
/* mark link not to be encrypted, so that when we execute security next time it will kick in again */
if ((status == HCI_SUCCESS) && !encr_enable)
{
if (p_dev_rec->hci_handle == handle)
p_dev_rec->sec_flags &= ~BTM_SEC_ENCRYPTED;
else
p_dev_rec->sec_flags &= ~BTM_SEC_LE_ENCRYPTED;
}
BTM_TRACE_DEBUG ("after update p_dev_rec->sec_flags=0x%x", p_dev_rec->sec_flags );
#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
if (acl_idx != MAX_L2CAP_LINKS)
p_acl = &btm_cb.acl_db[acl_idx];
if (p_acl != NULL)
btm_sec_check_pending_enc_req(p_dev_rec, p_acl->transport, encr_enable);
if (p_acl && p_acl->transport == BT_TRANSPORT_LE)
{
if (status == HCI_ERR_KEY_MISSING || status == HCI_ERR_AUTH_FAILURE ||
status == HCI_ERR_ENCRY_MODE_NOT_ACCEPTABLE)
{
p_dev_rec->sec_flags &= ~ (BTM_SEC_LE_LINK_KEY_KNOWN);
p_dev_rec->ble.key_type = BTM_LE_KEY_NONE;
}
btm_ble_link_encrypted(p_dev_rec->ble.pseudo_addr, encr_enable);
return;
}
else
{
/* BR/EDR connection, update the encryption key size to be 16 as always */
p_dev_rec->enc_key_size = 16;
}
BTM_TRACE_DEBUG ("in %s new_encr_key_256 is %d",
__func__, p_dev_rec->new_encryption_key_is_p256);
if ((status == HCI_SUCCESS) && encr_enable && (p_dev_rec->hci_handle == handle))
{
if (p_dev_rec->new_encryption_key_is_p256)
{
if (btm_sec_use_smp_br_chnl(p_dev_rec) &&
btm_sec_is_master(p_dev_rec) &&
/* if LE key is not known, do deriving */
(!(p_dev_rec->sec_flags &BTM_SEC_LE_LINK_KEY_KNOWN) ||
/* or BR key is higher security than existing LE keys */
(!(p_dev_rec->sec_flags & BTM_SEC_LE_LINK_KEY_AUTHED)
&& (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_AUTHED))))
{
/* BR/EDR is encrypted with LK that can be used to derive LE LTK */
p_dev_rec->new_encryption_key_is_p256 = FALSE;
if (p_dev_rec->no_smp_on_br)
{
BTM_TRACE_DEBUG ("%s NO SM over BR/EDR", __func__);
}
else
{
BTM_TRACE_DEBUG ("%s start SM over BR/EDR", __func__);
SMP_BR_PairWith(p_dev_rec->bd_addr);
}
}
}
else
{
// BR/EDR is successfully encrypted. Correct LK type if needed
// (BR/EDR LK derived from LE LTK was used for encryption)
if ((encr_enable == 1) && /* encryption is ON for SSP */
/* LK type is for BR/EDR SC */
(p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB_P_256 ||
p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256))
{
if (p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB_P_256)
p_dev_rec->link_key_type = BTM_LKEY_TYPE_UNAUTH_COMB;
else /* BTM_LKEY_TYPE_AUTH_COMB_P_256 */
p_dev_rec->link_key_type = BTM_LKEY_TYPE_AUTH_COMB;
BTM_TRACE_DEBUG("updated link key type to %d", p_dev_rec->link_key_type);
btm_send_link_key_notif(p_dev_rec);
}
}
}
#else
btm_sec_check_pending_enc_req (p_dev_rec, BT_TRANSPORT_BR_EDR, encr_enable);
#endif /* BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE */
/* If this encryption was started by peer do not need to do anything */
if (p_dev_rec->sec_state != BTM_SEC_STATE_ENCRYPTING)
{
if (BTM_SEC_STATE_DELAY_FOR_ENC == p_dev_rec->sec_state)
{
p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;
p_dev_rec->p_callback = NULL;
l2cu_resubmit_pending_sec_req (p_dev_rec->bd_addr);
}
return;
}
p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;
/* If encryption setup failed, notify the waiting layer */
if (status != HCI_SUCCESS)
{
btm_sec_dev_rec_cback_event (p_dev_rec, BTM_ERR_PROCESSING, FALSE);
return;
}
/* Encryption setup succeeded, execute the next security procedure, if any */
status = (UINT8)btm_sec_execute_procedure (p_dev_rec);
/* If there is no next procedure, or procedure failed to start, notify the caller */
if (status != BTM_CMD_STARTED)
btm_sec_dev_rec_cback_event (p_dev_rec, status, FALSE);
}
/*******************************************************************************
**
** Function btm_sec_connect_after_reject_timeout
**
** Description Connection for bonding could not start because of the collision
** Initiate outgoing connection
**
** Returns Pointer to the TLE struct
**
*******************************************************************************/
static void btm_sec_connect_after_reject_timeout(UNUSED_ATTR void *data)
{
tBTM_SEC_DEV_REC *p_dev_rec = btm_cb.p_collided_dev_rec;
BTM_TRACE_EVENT("%s", __func__);
btm_cb.p_collided_dev_rec = 0;
if (btm_sec_dd_create_conn(p_dev_rec) != BTM_CMD_STARTED)
{
BTM_TRACE_WARNING("Security Manager: %s: failed to start connection",
__func__);
btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
if (btm_cb.api.p_auth_complete_callback)
(*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class,
p_dev_rec->sec_bd_name, HCI_ERR_MEMORY_FULL);
}
}
/*******************************************************************************
**
** Function btm_sec_connected
**
** Description This function is when a connection to the peer device is
** establsihed
**
** Returns void
**
*******************************************************************************/
void btm_sec_connected (UINT8 *bda, UINT16 handle, UINT8 status, UINT8 enc_mode)
{
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bda);
UINT8 res;
BOOLEAN is_pairing_device = FALSE;
tACL_CONN *p_acl_cb;
UINT8 bit_shift = 0;
btm_acl_resubmit_page();
/* Commenting out trace due to obf/compilation problems.
*/
#if (BT_USE_TRACES == TRUE)
if (p_dev_rec)
{
BTM_TRACE_EVENT ("Security Manager: btm_sec_connected in state: %s handle:%d status:%d enc_mode:%d bda:%x RName:%s",
btm_pair_state_descr(btm_cb.pairing_state), handle, status, enc_mode,
(bda[2]<<24)+(bda[3]<<16)+(bda[4]<<8)+bda[5],
p_dev_rec->sec_bd_name);
}
else
{
BTM_TRACE_EVENT ("Security Manager: btm_sec_connected in state: %s handle:%d status:%d enc_mode:%d bda:%x ",
btm_pair_state_descr(btm_cb.pairing_state), handle, status, enc_mode,
(bda[2]<<24)+(bda[3]<<16)+(bda[4]<<8)+bda[5]);
}
#endif
if (!p_dev_rec)
{
/* There is no device record for new connection. Allocate one */
if (status == HCI_SUCCESS)
{
p_dev_rec = btm_sec_alloc_dev (bda);
}
else
{
/* If the device matches with stored paring address
* reset the paring state to idle */
if ((btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) &&
(memcmp (btm_cb.pairing_bda, bda, BD_ADDR_LEN) == 0))
{
btm_sec_change_pairing_state(BTM_PAIR_STATE_IDLE);
}
/* can not find the device record and the status is error,
* just ignore it */
return;
}
}
else /* Update the timestamp for this device */
{
#if BLE_INCLUDED == TRUE
bit_shift = (handle == p_dev_rec->ble_hci_handle) ? 8 :0;
#endif
p_dev_rec->timestamp = btm_cb.dev_rec_count++;
if (p_dev_rec->sm4 & BTM_SM4_CONN_PEND)
{
/* tell L2CAP it's a bonding connection. */
if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
&& (memcmp (btm_cb.pairing_bda, p_dev_rec->bd_addr, BD_ADDR_LEN) == 0)
&& (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) )
{
/* if incoming connection failed while pairing, then try to connect and continue */
/* Motorola S9 disconnects without asking pin code */
if ((status != HCI_SUCCESS)&&(btm_cb.pairing_state == BTM_PAIR_STATE_WAIT_PIN_REQ))
{
BTM_TRACE_WARNING ("Security Manager: btm_sec_connected: incoming connection failed without asking PIN");
p_dev_rec->sm4 &= ~BTM_SM4_CONN_PEND;
if (p_dev_rec->sec_flags & BTM_SEC_NAME_KNOWN)
{
/* Start timer with 0 to initiate connection with new LCB */
/* because L2CAP will delete current LCB with this event */
btm_cb.p_collided_dev_rec = p_dev_rec;
alarm_set_on_queue(btm_cb.sec_collision_timer, 0,
btm_sec_connect_after_reject_timeout,
NULL, btu_general_alarm_queue);
}
else
{
btm_sec_change_pairing_state (BTM_PAIR_STATE_GET_REM_NAME);
BTM_ReadRemoteDeviceName(p_dev_rec->bd_addr, NULL, BT_TRANSPORT_BR_EDR);
}
#if BTM_DISC_DURING_RS == TRUE
p_dev_rec->rs_disc_pending = BTM_SEC_RS_NOT_PENDING; /* reset flag */
#endif
return;
}
else
{
l2cu_update_lcb_4_bonding(p_dev_rec->bd_addr, TRUE);
}
}
/* always clear the pending flag */
p_dev_rec->sm4 &= ~BTM_SM4_CONN_PEND;
}
}
#if BLE_INCLUDED == TRUE
p_dev_rec->device_type |= BT_DEVICE_TYPE_BREDR;
#endif
#if BTM_DISC_DURING_RS == TRUE
p_dev_rec->rs_disc_pending = BTM_SEC_RS_NOT_PENDING; /* reset flag */
#endif
p_dev_rec->rs_disc_pending = BTM_SEC_RS_NOT_PENDING; /* reset flag */
if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
&& (memcmp (btm_cb.pairing_bda, bda, BD_ADDR_LEN) == 0) )
{
/* if we rejected incoming connection from bonding device */
if ((status == HCI_ERR_HOST_REJECT_DEVICE)
&&(btm_cb.pairing_flags & BTM_PAIR_FLAGS_REJECTED_CONNECT))
{
BTM_TRACE_WARNING ("Security Manager: btm_sec_connected: HCI_Conn_Comp Flags:0x%04x, sm4: 0x%x",
btm_cb.pairing_flags, p_dev_rec->sm4);
btm_cb.pairing_flags &= ~BTM_PAIR_FLAGS_REJECTED_CONNECT;
if (BTM_SEC_IS_SM4_UNKNOWN(p_dev_rec->sm4))
{
/* Try again: RNR when no ACL causes HCI_RMT_HOST_SUP_FEAT_NOTIFY_EVT */
btm_sec_change_pairing_state (BTM_PAIR_STATE_GET_REM_NAME);
BTM_ReadRemoteDeviceName(bda, NULL, BT_TRANSPORT_BR_EDR);
return;
}
/* if we already have pin code */
if (btm_cb.pairing_state != BTM_PAIR_STATE_WAIT_LOCAL_PIN)
{
/* Start timer with 0 to initiate connection with new LCB */
/* because L2CAP will delete current LCB with this event */
btm_cb.p_collided_dev_rec = p_dev_rec;
alarm_set_on_queue(btm_cb.sec_collision_timer, 0,
btm_sec_connect_after_reject_timeout,
NULL, btu_general_alarm_queue);
}
return;
}
/* wait for incoming connection without resetting pairing state */
else if (status == HCI_ERR_CONNECTION_EXISTS)
{
BTM_TRACE_WARNING ("Security Manager: btm_sec_connected: Wait for incoming connection");
return;
}
is_pairing_device = TRUE;
}
/* If connection was made to do bonding restore link security if changed */
btm_restore_mode();
/* if connection fails during pin request, notify application */
if (status != HCI_SUCCESS)
{
/* If connection failed because of during pairing, need to tell user */
if (is_pairing_device)
{
p_dev_rec->security_required &= ~BTM_SEC_OUT_AUTHENTICATE;
p_dev_rec->sec_flags &= ~((BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LINK_KEY_AUTHED) << bit_shift);
BTM_TRACE_DEBUG ("security_required:%x ", p_dev_rec->security_required );
btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
/* We need to notify host that the key is not known any more */
if (btm_cb.api.p_auth_complete_callback)
{
(*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,
p_dev_rec->dev_class,
p_dev_rec->sec_bd_name, status);
}
}
/*
Do not send authentication failure, if following conditions hold good
1. BTM Sec Pairing state is idle
2. Link key for the remote device is present.
3. Remote is SSP capable.
*/
else if ((p_dev_rec->link_key_type <= BTM_LKEY_TYPE_REMOTE_UNIT) &&
(((status == HCI_ERR_AUTH_FAILURE) ||
(status == HCI_ERR_KEY_MISSING) ||
(status == HCI_ERR_HOST_REJECT_SECURITY) ||
(status == HCI_ERR_PAIRING_NOT_ALLOWED) ||
(status == HCI_ERR_UNIT_KEY_USED) ||
(status == HCI_ERR_PAIRING_WITH_UNIT_KEY_NOT_SUPPORTED) ||
(status == HCI_ERR_ENCRY_MODE_NOT_ACCEPTABLE) ||
(status == HCI_ERR_REPEATED_ATTEMPTS))))
{
p_dev_rec->security_required &= ~BTM_SEC_OUT_AUTHENTICATE;
p_dev_rec->sec_flags &= ~ (BTM_SEC_LE_LINK_KEY_KNOWN << bit_shift);
#ifdef BRCM_NOT_4_BTE
/* If we rejected pairing, pass this special result code */
if (btm_cb.acl_disc_reason == HCI_ERR_HOST_REJECT_SECURITY)
{
status = HCI_ERR_HOST_REJECT_SECURITY;
}
#endif
/* We need to notify host that the key is not known any more */
if (btm_cb.api.p_auth_complete_callback)
{
(*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,
p_dev_rec->dev_class,
p_dev_rec->sec_bd_name, status);
}
}
if (status == HCI_ERR_CONNECTION_TOUT || status == HCI_ERR_LMP_RESPONSE_TIMEOUT ||
status == HCI_ERR_UNSPECIFIED || status == HCI_ERR_PAGE_TIMEOUT)
btm_sec_dev_rec_cback_event (p_dev_rec, BTM_DEVICE_TIMEOUT, FALSE);
else
btm_sec_dev_rec_cback_event (p_dev_rec, BTM_ERR_PROCESSING, FALSE);
return;
}
/* If initiated dedicated bonding, return the link key now, and initiate disconnect */
/* If dedicated bonding, and we now have a link key, we are all done */
if ( is_pairing_device
&& (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN) )
{
if (p_dev_rec->link_key_not_sent)
{
p_dev_rec->link_key_not_sent = FALSE;
btm_send_link_key_notif(p_dev_rec);
}
p_dev_rec->security_required &= ~BTM_SEC_OUT_AUTHENTICATE;
/* remember flag before it is initialized */
if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)
res = TRUE;
else
res = FALSE;
if (btm_cb.api.p_auth_complete_callback)
(*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,
p_dev_rec->dev_class,
p_dev_rec->sec_bd_name, HCI_SUCCESS);
btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
if ( res )
{
/* Let l2cap start bond timer */
l2cu_update_lcb_4_bonding (p_dev_rec->bd_addr, TRUE);
}
return;
}
p_dev_rec->hci_handle = handle;
/* role may not be correct here, it will be updated by l2cap, but we need to */
/* notify btm_acl that link is up, so starting of rmt name request will not */
/* set paging flag up */
p_acl_cb = btm_bda_to_acl(bda, BT_TRANSPORT_BR_EDR);
if (p_acl_cb)
{
/* whatever is in btm_establish_continue() without reporting the BTM_BL_CONN_EVT event */
#if (!defined(BTM_BYPASS_EXTRA_ACL_SETUP) || BTM_BYPASS_EXTRA_ACL_SETUP == FALSE)
/* For now there are a some devices that do not like sending */
/* commands events and data at the same time. */
/* Set the packet types to the default allowed by the device */
btm_set_packet_types (p_acl_cb, btm_cb.btm_acl_pkt_types_supported);
if (btm_cb.btm_def_link_policy)
BTM_SetLinkPolicy (p_acl_cb->remote_addr, &btm_cb.btm_def_link_policy);
#endif
}
btm_acl_created (bda, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, handle, HCI_ROLE_SLAVE, BT_TRANSPORT_BR_EDR);
/* Initialize security flags. We need to do that because some */
/* authorization complete could have come after the connection is dropped */
/* and that would set wrong flag that link has been authorized already */
p_dev_rec->sec_flags &= ~((BTM_SEC_AUTHORIZED | BTM_SEC_AUTHENTICATED |
BTM_SEC_ENCRYPTED | BTM_SEC_ROLE_SWITCHED) << bit_shift);
if (enc_mode != HCI_ENCRYPT_MODE_DISABLED)
p_dev_rec->sec_flags |= ((BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED) << bit_shift);
if (btm_cb.security_mode == BTM_SEC_MODE_LINK)
p_dev_rec->sec_flags |= (BTM_SEC_AUTHENTICATED << bit_shift);
if (p_dev_rec->pin_code_length >= 16 ||
p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB ||
p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256) {
p_dev_rec->sec_flags |= (BTM_SEC_16_DIGIT_PIN_AUTHED << bit_shift);
}
p_dev_rec->link_key_changed = FALSE;
/* After connection is established we perform security if we do not know */
/* the name, or if we are originator because some procedure can have */
/* been scheduled while connection was down */
BTM_TRACE_DEBUG ("is_originator:%d ", p_dev_rec->is_originator);
if (!(p_dev_rec->sec_flags & BTM_SEC_NAME_KNOWN) || p_dev_rec->is_originator)
{
if ((res = btm_sec_execute_procedure (p_dev_rec)) != BTM_CMD_STARTED)
btm_sec_dev_rec_cback_event (p_dev_rec, res, FALSE);
}
return;
}
/*******************************************************************************
**
** Function btm_sec_disconnect
**
** Description This function is called to disconnect HCI link
**
** Returns btm status
**
*******************************************************************************/
tBTM_STATUS btm_sec_disconnect (UINT16 handle, UINT8 reason)
{
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev_by_handle (handle);
/* In some weird race condition we may not have a record */
if (!p_dev_rec)
{
btsnd_hcic_disconnect (handle, reason);
return(BTM_SUCCESS);
}
/* If we are in the process of bonding we need to tell client that auth failed */
if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
&& (memcmp (btm_cb.pairing_bda, p_dev_rec->bd_addr, BD_ADDR_LEN) == 0)
&& (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) )
{
/* we are currently doing bonding. Link will be disconnected when done */
btm_cb.pairing_flags |= BTM_PAIR_FLAGS_DISC_WHEN_DONE;
return(BTM_BUSY);
}
return(btm_sec_send_hci_disconnect(p_dev_rec, reason, handle));
}
/*******************************************************************************
**
** Function btm_sec_disconnected
**
** Description This function is when a connection to the peer device is
** dropped
**
** Returns void
**
*******************************************************************************/
void btm_sec_disconnected (UINT16 handle, UINT8 reason)
{
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev_by_handle (handle);
UINT8 old_pairing_flags = btm_cb.pairing_flags;
int result = HCI_ERR_AUTH_FAILURE;
tBTM_SEC_CALLBACK *p_callback = NULL;
tBT_TRANSPORT transport = BT_TRANSPORT_BR_EDR;
/* If page was delayed for disc complete, can do it now */
btm_cb.discing = FALSE;
btm_acl_resubmit_page();
if (!p_dev_rec)
return;
transport = (handle == p_dev_rec->hci_handle) ? BT_TRANSPORT_BR_EDR: BT_TRANSPORT_LE;
p_dev_rec->rs_disc_pending = BTM_SEC_RS_NOT_PENDING; /* reset flag */
#if BTM_DISC_DURING_RS == TRUE
LOG_INFO(LOG_TAG, "%s clearing pending flag handle:%d reason:%d", __func__, handle, reason);
p_dev_rec->rs_disc_pending = BTM_SEC_RS_NOT_PENDING; /* reset flag */
#endif
/* clear unused flags */
p_dev_rec->sm4 &= BTM_SM4_TRUE;
uint8_t *bd_addr = (uint8_t *)p_dev_rec->bd_addr;
BTM_TRACE_EVENT("%s sec_req:x%x state:%s reason:%d bd_addr:%02x:%02x:%02x:%02x:%02x:%02x"
" remote_name:%s", __func__, p_dev_rec->security_required, btm_pair_state_descr(btm_cb.pairing_state),
reason, bd_addr[0], bd_addr[1], bd_addr[2], bd_addr[3], bd_addr[4], bd_addr[5], p_dev_rec->sec_bd_name);
BTM_TRACE_EVENT("%s before update sec_flags=0x%x", __func__, p_dev_rec->sec_flags);
/* If we are in the process of bonding we need to tell client that auth failed */
if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
&& (memcmp (btm_cb.pairing_bda, p_dev_rec->bd_addr, BD_ADDR_LEN) == 0))
{
btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
p_dev_rec->sec_flags &= ~BTM_SEC_LINK_KEY_KNOWN;
if (btm_cb.api.p_auth_complete_callback)
{
/* If the disconnection reason is REPEATED_ATTEMPTS,
send this error message to complete callback function
to display the error message of Repeated attempts.
All others, send HCI_ERR_AUTH_FAILURE. */
if (reason == HCI_ERR_REPEATED_ATTEMPTS)
{
result = HCI_ERR_REPEATED_ATTEMPTS;
}
else if (old_pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)
{
result = HCI_ERR_HOST_REJECT_SECURITY;
}
(*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class,
p_dev_rec->sec_bd_name, result);
}
}
#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
btm_ble_update_mode_operation(HCI_ROLE_UNKNOWN, p_dev_rec->bd_addr, HCI_SUCCESS);
/* see sec_flags processing in btm_acl_removed */
if (transport == BT_TRANSPORT_LE)
{
p_dev_rec->ble_hci_handle = BTM_SEC_INVALID_HANDLE;
p_dev_rec->sec_flags &= ~(BTM_SEC_LE_AUTHENTICATED|BTM_SEC_LE_ENCRYPTED);
p_dev_rec->enc_key_size = 0;
}
else
#endif
{
p_dev_rec->hci_handle = BTM_SEC_INVALID_HANDLE;
p_dev_rec->sec_flags &= ~(BTM_SEC_AUTHORIZED | BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED
| BTM_SEC_ROLE_SWITCHED | BTM_SEC_16_DIGIT_PIN_AUTHED);
}
#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
if (p_dev_rec->sec_state == BTM_SEC_STATE_DISCONNECTING_BOTH)
{
p_dev_rec->sec_state = (transport == BT_TRANSPORT_LE) ?
BTM_SEC_STATE_DISCONNECTING : BTM_SEC_STATE_DISCONNECTING_BLE;
return;
}
#endif
p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;
p_dev_rec->security_required = BTM_SEC_NONE;
p_callback = p_dev_rec->p_callback;
/* if security is pending, send callback to clean up the security state */
if(p_callback)
{
p_dev_rec->p_callback = NULL; /* when the peer device time out the authentication before
we do, this call back must be reset here */
(*p_callback) (p_dev_rec->bd_addr, transport, p_dev_rec->p_ref_data, BTM_ERR_PROCESSING);
}
BTM_TRACE_EVENT("%s after update sec_flags=0x%x", __func__, p_dev_rec->sec_flags);
}
/*******************************************************************************
**
** Function btm_sec_link_key_notification
**
** Description This function is called when a new connection link key is
** generated
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
void btm_sec_link_key_notification (UINT8 *p_bda, UINT8 *p_link_key, UINT8 key_type)
{
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (p_bda);
BOOLEAN we_are_bonding = FALSE;
BOOLEAN ltk_derived_lk = FALSE;
BTM_TRACE_EVENT ("btm_sec_link_key_notification() BDA:%04x%08x, TYPE: %d",
(p_bda[0]<<8)+p_bda[1], (p_bda[2]<<24)+(p_bda[3]<<16)+(p_bda[4]<<8)+p_bda[5],
key_type);
if ((key_type >= BTM_LTK_DERIVED_LKEY_OFFSET + BTM_LKEY_TYPE_COMBINATION) &&
(key_type <= BTM_LTK_DERIVED_LKEY_OFFSET + BTM_LKEY_TYPE_AUTH_COMB_P_256))
{
ltk_derived_lk = TRUE;
key_type -= BTM_LTK_DERIVED_LKEY_OFFSET;
}
/* If connection was made to do bonding restore link security if changed */
btm_restore_mode();
if (key_type != BTM_LKEY_TYPE_CHANGED_COMB)
p_dev_rec->link_key_type = key_type;
p_dev_rec->sec_flags |= BTM_SEC_LINK_KEY_KNOWN;
/*
* Until this point in time, we do not know if MITM was enabled, hence we
* add the extended security flag here.
*/
if (p_dev_rec->pin_code_length >= 16 ||
p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB ||
p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256) {
p_dev_rec->sec_flags |= BTM_SEC_16_DIGIT_PIN_AUTHED;
}
#if (BLE_INCLUDED == TRUE)
/* BR/EDR connection, update the encryption key size to be 16 as always */
p_dev_rec->enc_key_size = 16;
#endif
memcpy (p_dev_rec->link_key, p_link_key, LINK_KEY_LEN);
if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
&& (memcmp (btm_cb.pairing_bda, p_bda, BD_ADDR_LEN) == 0) )
{
if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)
we_are_bonding = TRUE;
else
btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
}
/* save LTK derived LK no matter what */
if (ltk_derived_lk)
{
if (btm_cb.api.p_link_key_callback)
{
BTM_TRACE_DEBUG ("%s() Save LTK derived LK (key_type = %d)",
__FUNCTION__, p_dev_rec->link_key_type);
(*btm_cb.api.p_link_key_callback) (p_bda, p_dev_rec->dev_class,
p_dev_rec->sec_bd_name,
p_link_key, p_dev_rec->link_key_type);
}
}
else
{
if ((p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB_P_256) ||
(p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256))
{
p_dev_rec->new_encryption_key_is_p256 = TRUE;
BTM_TRACE_DEBUG ("%s set new_encr_key_256 to %d",
__func__, p_dev_rec->new_encryption_key_is_p256);
}
}
/* If name is not known at this point delay calling callback until the name is */
/* resolved. Unless it is a HID Device and we really need to send all link keys. */
if ((!(p_dev_rec->sec_flags & BTM_SEC_NAME_KNOWN)
&& ((p_dev_rec->dev_class[1] & BTM_COD_MAJOR_CLASS_MASK) != BTM_COD_MAJOR_PERIPHERAL))
&& !ltk_derived_lk)
{
BTM_TRACE_EVENT ("btm_sec_link_key_notification() Delayed BDA: %08x%04x Type:%d",
(p_bda[0]<<24) + (p_bda[1]<<16) + (p_bda[2]<<8) + p_bda[3],
(p_bda[4] << 8) + p_bda[5], key_type);
p_dev_rec->link_key_not_sent = TRUE;
/* If it is for bonding nothing else will follow, so we need to start name resolution */
if (we_are_bonding)
{
if (!(btsnd_hcic_rmt_name_req (p_bda, HCI_PAGE_SCAN_REP_MODE_R1, HCI_MANDATARY_PAGE_SCAN_MODE, 0)))
btm_inq_rmt_name_failed();
}
BTM_TRACE_EVENT ("rmt_io_caps:%d, sec_flags:x%x, dev_class[1]:x%02x", p_dev_rec->rmt_io_caps, p_dev_rec->sec_flags, p_dev_rec->dev_class[1])
return;
}
/* If its not us who perform authentication, we should tell stackserver */
/* that some authentication has been completed */
/* This is required when different entities receive link notification and auth complete */
if (!(p_dev_rec->security_required & BTM_SEC_OUT_AUTHENTICATE)
/* for derived key, always send authentication callback for BR channel */
|| ltk_derived_lk)
{
if (btm_cb.api.p_auth_complete_callback)
(*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class,
p_dev_rec->sec_bd_name, HCI_SUCCESS);
}
/* We will save link key only if the user authorized it - BTE report link key in all cases */
#ifdef BRCM_NONE_BTE
if (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_AUTHED)
#endif
{
if (btm_cb.api.p_link_key_callback)
{
if (ltk_derived_lk)
{
BTM_TRACE_DEBUG ("btm_sec_link_key_notification() LTK derived LK is saved already"
" (key_type = %d)", p_dev_rec->link_key_type);
}
else
{
(*btm_cb.api.p_link_key_callback) (p_bda, p_dev_rec->dev_class,
p_dev_rec->sec_bd_name,
p_link_key, p_dev_rec->link_key_type);
}
}
}
}
/*******************************************************************************
**
** Function btm_sec_link_key_request
**
** Description This function is called when controller requests link key
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
void btm_sec_link_key_request (UINT8 *p_bda)
{
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (p_bda);
BTM_TRACE_EVENT ("btm_sec_link_key_request() BDA: %02x:%02x:%02x:%02x:%02x:%02x",
p_bda[0], p_bda[1], p_bda[2], p_bda[3], p_bda[4], p_bda[5]);
if( (btm_cb.pairing_state == BTM_PAIR_STATE_WAIT_PIN_REQ) &&
(btm_cb.collision_start_time != 0) &&
(memcmp (btm_cb.p_collided_dev_rec->bd_addr, p_bda, BD_ADDR_LEN) == 0) )
{
BTM_TRACE_EVENT ("btm_sec_link_key_request() rejecting link key req "
"State: %d START_TIMEOUT : %d",
btm_cb.pairing_state, btm_cb.collision_start_time);
btsnd_hcic_link_key_neg_reply (p_bda);
return;
}
if (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN)
{
btsnd_hcic_link_key_req_reply (p_bda, p_dev_rec->link_key);
return;
}
/* Notify L2CAP to increase timeout */
l2c_pin_code_request (p_bda);
/* The link key is not in the database and it is not known to the manager */
btsnd_hcic_link_key_neg_reply (p_bda);
}
/*******************************************************************************
**
** Function btm_sec_pairing_timeout
**
** Description This function is called when host does not provide PIN
** within requested time
**
** Returns Pointer to the TLE struct
**
*******************************************************************************/
static void btm_sec_pairing_timeout(UNUSED_ATTR void *data)
{
tBTM_CB *p_cb = &btm_cb;
tBTM_SEC_DEV_REC *p_dev_rec;
#if (BTM_LOCAL_IO_CAPS == BTM_IO_CAP_NONE)
tBTM_AUTH_REQ auth_req = BTM_AUTH_AP_NO;
#else
tBTM_AUTH_REQ auth_req = BTM_AUTH_AP_YES;
#endif
UINT8 name[2];
/* Coverity: FALSE-POSITIVE error from Coverity tool. Please do NOT remove following comment. */
/* coverity[UNUSED_VALUE] pointer p_dev_rec is actually used several times... This is a Coverity false-positive, i.e. a fake issue.
*/
p_dev_rec = btm_find_dev (p_cb->pairing_bda);
BTM_TRACE_EVENT ("%s State: %s Flags: %u", __func__,
btm_pair_state_descr(p_cb->pairing_state), p_cb->pairing_flags);
switch (p_cb->pairing_state)
{
case BTM_PAIR_STATE_WAIT_PIN_REQ:
btm_sec_bond_cancel_complete();
break;
case BTM_PAIR_STATE_WAIT_LOCAL_PIN:
if ( (btm_cb.pairing_flags & BTM_PAIR_FLAGS_PRE_FETCH_PIN) == 0)
btsnd_hcic_pin_code_neg_reply (p_cb->pairing_bda);
btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
/* We need to notify the UI that no longer need the PIN */
if (btm_cb.api.p_auth_complete_callback)
{
if (p_dev_rec == NULL)
{
name[0] = 0;
(*btm_cb.api.p_auth_complete_callback) (p_cb->pairing_bda,
NULL,
name, HCI_ERR_CONNECTION_TOUT);
}
else
(*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,
p_dev_rec->dev_class,
p_dev_rec->sec_bd_name, HCI_ERR_CONNECTION_TOUT);
}
break;
case BTM_PAIR_STATE_WAIT_NUMERIC_CONFIRM:
btsnd_hcic_user_conf_reply (p_cb->pairing_bda, FALSE);
/* btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); */
break;
#if (BTM_LOCAL_IO_CAPS != BTM_IO_CAP_NONE)
case BTM_PAIR_STATE_KEY_ENTRY:
btsnd_hcic_user_passkey_neg_reply(p_cb->pairing_bda);
/* btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); */
break;
#endif /* !BTM_IO_CAP_NONE */
case BTM_PAIR_STATE_WAIT_LOCAL_IOCAPS:
if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)
auth_req |= BTM_AUTH_DD_BOND;
btsnd_hcic_io_cap_req_reply (p_cb->pairing_bda, btm_cb.devcb.loc_io_caps,
BTM_OOB_NONE, auth_req);
btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
break;
case BTM_PAIR_STATE_WAIT_LOCAL_OOB_RSP:
btsnd_hcic_rem_oob_neg_reply (p_cb->pairing_bda);
btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
break;
case BTM_PAIR_STATE_WAIT_DISCONNECT:
/* simple pairing failed. Started a 1-sec timer at simple pairing complete.
* now it's time to tear down the ACL link*/
if (p_dev_rec == NULL)
{
BTM_TRACE_ERROR("%s BTM_PAIR_STATE_WAIT_DISCONNECT unknown BDA: %08x%04x",
__func__,
(p_cb->pairing_bda[0]<<24) + (p_cb->pairing_bda[1]<<16) + (p_cb->pairing_bda[2]<<8) + p_cb->pairing_bda[3],
(p_cb->pairing_bda[4] << 8) + p_cb->pairing_bda[5]);
break;
}
btm_sec_send_hci_disconnect (p_dev_rec, HCI_ERR_AUTH_FAILURE, p_dev_rec->hci_handle);
btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
break;
case BTM_PAIR_STATE_WAIT_AUTH_COMPLETE:
case BTM_PAIR_STATE_GET_REM_NAME:
/* We need to notify the UI that timeout has happened while waiting for authentication*/
btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
if (btm_cb.api.p_auth_complete_callback)
{
if (p_dev_rec == NULL)
{
name[0] = 0;
(*btm_cb.api.p_auth_complete_callback) (p_cb->pairing_bda,
NULL,
name, HCI_ERR_CONNECTION_TOUT);
}
else
(*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,
p_dev_rec->dev_class,
p_dev_rec->sec_bd_name, HCI_ERR_CONNECTION_TOUT);
}
break;
default:
BTM_TRACE_WARNING("%s not processed state: %s", __func__,
btm_pair_state_descr(btm_cb.pairing_state));
btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
break;
}
}
/*******************************************************************************
**
** Function btm_sec_pin_code_request
**
** Description This function is called when controller requests PIN code
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
void btm_sec_pin_code_request (UINT8 *p_bda)
{
tBTM_SEC_DEV_REC *p_dev_rec;
tBTM_CB *p_cb = &btm_cb;
BTM_TRACE_EVENT ("btm_sec_pin_code_request() State: %s, BDA:%04x%08x",
btm_pair_state_descr(btm_cb.pairing_state),
(p_bda[0]<<8)+p_bda[1], (p_bda[2]<<24)+(p_bda[3]<<16)+(p_bda[4]<<8)+p_bda[5] );
if (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
{
if ( (memcmp (p_bda, btm_cb.pairing_bda, BD_ADDR_LEN) == 0) &&
(btm_cb.pairing_state == BTM_PAIR_STATE_WAIT_AUTH_COMPLETE) )
{
btsnd_hcic_pin_code_neg_reply (p_bda);
return;
}
else if ((btm_cb.pairing_state != BTM_PAIR_STATE_WAIT_PIN_REQ)
|| memcmp (p_bda, btm_cb.pairing_bda, BD_ADDR_LEN) != 0)
{
BTM_TRACE_WARNING ("btm_sec_pin_code_request() rejected - state: %s",
btm_pair_state_descr(btm_cb.pairing_state));
btsnd_hcic_pin_code_neg_reply (p_bda);
return;
}
}
p_dev_rec = btm_find_or_alloc_dev (p_bda);
/* received PIN code request. must be non-sm4 */
p_dev_rec->sm4 = BTM_SM4_KNOWN;
if (btm_cb.pairing_state == BTM_PAIR_STATE_IDLE)
{
memcpy (btm_cb.pairing_bda, p_bda, BD_ADDR_LEN);
btm_cb.pairing_flags = BTM_PAIR_FLAGS_PEER_STARTED_DD;
/* Make sure we reset the trusted mask to help against attacks */
BTM_SEC_CLR_TRUSTED_DEVICE(p_dev_rec->trusted_mask);
}
if (!p_cb->pairing_disabled && (p_cb->cfg.pin_type == HCI_PIN_TYPE_FIXED))
{
BTM_TRACE_EVENT ("btm_sec_pin_code_request fixed pin replying");
btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
btsnd_hcic_pin_code_req_reply (p_bda, p_cb->cfg.pin_code_len, p_cb->cfg.pin_code);
return;
}
/* Use the connecting device's CoD for the connection */
if ( (!memcmp (p_bda, p_cb->connecting_bda, BD_ADDR_LEN))
&& (p_cb->connecting_dc[0] || p_cb->connecting_dc[1] || p_cb->connecting_dc[2]) )
memcpy (p_dev_rec->dev_class, p_cb->connecting_dc, DEV_CLASS_LEN);
/* We could have started connection after asking user for the PIN code */
if (btm_cb.pin_code_len != 0)
{
BTM_TRACE_EVENT ("btm_sec_pin_code_request bonding sending reply");
btsnd_hcic_pin_code_req_reply (p_bda, btm_cb.pin_code_len, p_cb->pin_code);
/* Mark that we forwarded received from the user PIN code */
btm_cb.pin_code_len = 0;
/* We can change mode back right away, that other connection being established */
/* is not forced to be secure - found a FW issue, so we can not do this
btm_restore_mode(); */
btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
}
/* If pairing disabled OR (no PIN callback and not bonding) */
/* OR we could not allocate entry in the database reject pairing request */
else if (p_cb->pairing_disabled
|| (p_cb->api.p_pin_callback == NULL)
/* OR Microsoft keyboard can for some reason try to establish connection */
/* the only thing we can do here is to shut it up. Normally we will be originator */
/* for keyboard bonding */
|| (!p_dev_rec->is_originator
&& ((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_TRACE_WARNING("btm_sec_pin_code_request(): Pairing disabled:%d; PIN callback:%x, Dev Rec:%x!",
p_cb->pairing_disabled, p_cb->api.p_pin_callback, p_dev_rec);
btsnd_hcic_pin_code_neg_reply (p_bda);
}
/* Notify upper layer of PIN request and start expiration timer */
else
{
btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_LOCAL_PIN);
/* Pin code request can not come at the same time as connection request */
memcpy (p_cb->connecting_bda, p_bda, BD_ADDR_LEN);
memcpy (p_cb->connecting_dc, p_dev_rec->dev_class, DEV_CLASS_LEN);
/* Check if the name is known */
/* Even if name is not known we might not be able to get one */
/* this is the case when we are already getting something from the */
/* device, so HCI level is flow controlled */
/* Also cannot send remote name request while paging, i.e. connection is not completed */
if (p_dev_rec->sec_flags & BTM_SEC_NAME_KNOWN)
{
BTM_TRACE_EVENT ("btm_sec_pin_code_request going for callback");
btm_cb.pairing_flags |= BTM_PAIR_FLAGS_PIN_REQD;
if (p_cb->api.p_pin_callback) {
(*p_cb->api.p_pin_callback) (p_bda, p_dev_rec->dev_class, p_dev_rec->sec_bd_name,
(p_dev_rec->p_cur_service == NULL) ? FALSE
: (p_dev_rec->p_cur_service->security_flags
& BTM_SEC_IN_MIN_16_DIGIT_PIN));
}
}
else
{
BTM_TRACE_EVENT ("btm_sec_pin_code_request going for remote name");
/* We received PIN code request for the device with unknown name */
/* it is not user friendly just to ask for the PIN without name */
/* try to get name at first */
if (!btsnd_hcic_rmt_name_req (p_dev_rec->bd_addr,
HCI_PAGE_SCAN_REP_MODE_R1,
HCI_MANDATARY_PAGE_SCAN_MODE, 0))
{
p_dev_rec->sec_flags |= BTM_SEC_NAME_KNOWN;
p_dev_rec->sec_bd_name[0] = 'f';
p_dev_rec->sec_bd_name[1] = '0';
BTM_TRACE_ERROR ("can not send rmt_name_req?? fake a name and call callback");
btm_cb.pairing_flags |= BTM_PAIR_FLAGS_PIN_REQD;
if (p_cb->api.p_pin_callback)
(*p_cb->api.p_pin_callback) (p_bda, p_dev_rec->dev_class,
p_dev_rec->sec_bd_name, (p_dev_rec->p_cur_service == NULL) ? FALSE
: (p_dev_rec->p_cur_service->security_flags
& BTM_SEC_IN_MIN_16_DIGIT_PIN));
}
}
}
return;
}
/*******************************************************************************
**
** Function btm_sec_update_clock_offset
**
** Description This function is called to update clock offset
**
** Returns void
**
*******************************************************************************/
void btm_sec_update_clock_offset (UINT16 handle, UINT16 clock_offset)
{
tBTM_SEC_DEV_REC *p_dev_rec;
tBTM_INQ_INFO *p_inq_info;
if ((p_dev_rec = btm_find_dev_by_handle (handle)) == NULL)
return;
p_dev_rec->clock_offset = clock_offset | BTM_CLOCK_OFFSET_VALID;
if ((p_inq_info = BTM_InqDbRead(p_dev_rec->bd_addr)) == NULL)
return;
p_inq_info->results.clock_offset = clock_offset | BTM_CLOCK_OFFSET_VALID;
}
/******************************************************************
** S T A T I C F U N C T I O N S
*******************************************************************/
/*******************************************************************************
**
** Function btm_sec_execute_procedure
**
** Description This function is called to start required security
** procedure. There is a case when multiplexing protocol
** calls this function on the originating side, connection to
** the peer will not be established. This function in this
** case performs only authorization.
**
** Returns BTM_SUCCESS - permission is granted
** BTM_CMD_STARTED - in process
** BTM_NO_RESOURCES - permission declined
**
*******************************************************************************/
static tBTM_STATUS btm_sec_execute_procedure (tBTM_SEC_DEV_REC *p_dev_rec)
{
BTM_TRACE_EVENT ("btm_sec_execute_procedure: Required:0x%x Flags:0x%x State:%d",
p_dev_rec->security_required, p_dev_rec->sec_flags, p_dev_rec->sec_state);
/* There is a chance that we are getting name. Wait until done. */
if (p_dev_rec->sec_state != 0)
return(BTM_CMD_STARTED);
/* If any security is required, get the name first */
if (!(p_dev_rec->sec_flags & BTM_SEC_NAME_KNOWN)
&& (p_dev_rec->hci_handle != BTM_SEC_INVALID_HANDLE))
{
BTM_TRACE_EVENT ("Security Manager: Start get name");
if (!btm_sec_start_get_name (p_dev_rec))
{
return(BTM_NO_RESOURCES);
}
return(BTM_CMD_STARTED);
}
/* If connection is not authenticated and authentication is required */
/* start authentication and return PENDING to the caller */
if ((((!(p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED))
&& (( p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_OUT_AUTHENTICATE))
|| (!p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_IN_AUTHENTICATE))))
|| (!(p_dev_rec->sec_flags & BTM_SEC_16_DIGIT_PIN_AUTHED)
&& (!p_dev_rec->is_originator
&& (p_dev_rec->security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN))))
&& (p_dev_rec->hci_handle != BTM_SEC_INVALID_HANDLE))
{
/*
* We rely on BTM_SEC_16_DIGIT_PIN_AUTHED being set if MITM is in use,
* as 16 DIGIT is only needed if MITM is not used. Unfortunately, the
* BTM_SEC_AUTHENTICATED is used for both MITM and non-MITM
* authenticated connections, hence we cannot distinguish here.
*/
#if (L2CAP_UCD_INCLUDED == TRUE)
/* if incoming UCD packet, discard it */
if ( !p_dev_rec->is_originator && (p_dev_rec->is_ucd == TRUE ))
return(BTM_FAILED_ON_SECURITY);
#endif
BTM_TRACE_EVENT ("Security Manager: Start authentication");
/*
* If we do have a link-key, but we end up here because we need an
* upgrade, then clear the link-key known and authenticated flag before
* restarting authentication.
* WARNING: If the controller has link-key, it is optional and
* recommended for the controller to send a Link_Key_Request.
* In case we need an upgrade, the only alternative would be to delete
* the existing link-key. That could lead to very bad user experience
* or even IOP issues, if a reconnect causes a new connection that
* requires an upgrade.
*/
if ((p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN)
&& (!(p_dev_rec->sec_flags & BTM_SEC_16_DIGIT_PIN_AUTHED)
&& (!p_dev_rec->is_originator && (p_dev_rec->security_required
& BTM_SEC_IN_MIN_16_DIGIT_PIN)))) {
p_dev_rec->sec_flags &= ~(BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LINK_KEY_AUTHED
| BTM_SEC_AUTHENTICATED);
}
if (!btm_sec_start_authentication (p_dev_rec))
{
return(BTM_NO_RESOURCES);
}
return(BTM_CMD_STARTED);
}
/* If connection is not encrypted and encryption is required */
/* start encryption and return PENDING to the caller */
if (!(p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED)
&& (( p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_OUT_ENCRYPT))
|| (!p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_IN_ENCRYPT)))
&& (p_dev_rec->hci_handle != BTM_SEC_INVALID_HANDLE))
{
#if (L2CAP_UCD_INCLUDED == TRUE)
/* if incoming UCD packet, discard it */
if ( !p_dev_rec->is_originator && (p_dev_rec->is_ucd == TRUE ))
return(BTM_FAILED_ON_SECURITY);
#endif
BTM_TRACE_EVENT ("Security Manager: Start encryption");
if (!btm_sec_start_encryption (p_dev_rec))
{
return(BTM_NO_RESOURCES);
}
return(BTM_CMD_STARTED);
}
if ((p_dev_rec->security_required & BTM_SEC_MODE4_LEVEL4) &&
(p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256))
{
BTM_TRACE_EVENT("%s: Security Manager: SC only service, but link key type is 0x%02x -",
"security failure", __FUNCTION__, p_dev_rec->link_key_type);
return (BTM_FAILED_ON_SECURITY);
}
/* If connection is not authorized and authorization is required */
/* start authorization and return PENDING to the caller */
if (!(p_dev_rec->sec_flags & BTM_SEC_AUTHORIZED)
&& (( p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_OUT_AUTHORIZE))
|| (!p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_IN_AUTHORIZE))))
{
BTM_TRACE_EVENT ("service id:%d, is trusted:%d",
p_dev_rec->p_cur_service->service_id,
(BTM_SEC_IS_SERVICE_TRUSTED(p_dev_rec->trusted_mask,
p_dev_rec->p_cur_service->service_id)));
if ((btm_sec_are_all_trusted(p_dev_rec->trusted_mask) == FALSE) &&
(p_dev_rec->p_cur_service->service_id < BTM_SEC_MAX_SERVICES) &&
(BTM_SEC_IS_SERVICE_TRUSTED(p_dev_rec->trusted_mask,
p_dev_rec->p_cur_service->service_id) == FALSE))
{
BTM_TRACE_EVENT ("Security Manager: Start authorization");
return(btm_sec_start_authorization (p_dev_rec));
}
}
/* All required security procedures already established */
p_dev_rec->security_required &= ~(BTM_SEC_OUT_AUTHORIZE | BTM_SEC_IN_AUTHORIZE |
BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_IN_AUTHENTICATE |
BTM_SEC_OUT_ENCRYPT | BTM_SEC_IN_ENCRYPT |
BTM_SEC_FORCE_MASTER | BTM_SEC_ATTEMPT_MASTER |
BTM_SEC_FORCE_SLAVE | BTM_SEC_ATTEMPT_SLAVE);
BTM_TRACE_EVENT ("Security Manager: trusted:0x%04x%04x", p_dev_rec->trusted_mask[1], p_dev_rec->trusted_mask[0]);
BTM_TRACE_EVENT ("Security Manager: access granted");
return(BTM_SUCCESS);
}
/*******************************************************************************
**
** Function btm_sec_start_get_name
**
** Description This function is called to start get name procedure
**
** Returns TRUE if started
**
*******************************************************************************/
static BOOLEAN btm_sec_start_get_name (tBTM_SEC_DEV_REC *p_dev_rec)
{
UINT8 tempstate = p_dev_rec->sec_state;
p_dev_rec->sec_state = BTM_SEC_STATE_GETTING_NAME;
/* Device should be connected, no need to provide correct page params */
/* 0 and NULL are as timeout and callback params because they are not used in security get name case */
if ((btm_initiate_rem_name (p_dev_rec->bd_addr, NULL, BTM_RMT_NAME_SEC,
0, NULL)) != BTM_CMD_STARTED)
{
p_dev_rec->sec_state = tempstate;
return(FALSE);
}
return(TRUE);
}
/*******************************************************************************
**
** Function btm_sec_start_authentication
**
** Description This function is called to start authentication
**
** Returns TRUE if started
**
*******************************************************************************/
static BOOLEAN btm_sec_start_authentication (tBTM_SEC_DEV_REC *p_dev_rec)
{
p_dev_rec->sec_state = BTM_SEC_STATE_AUTHENTICATING;
return(btsnd_hcic_auth_request (p_dev_rec->hci_handle));
}
/*******************************************************************************
**
** Function btm_sec_start_encryption
**
** Description This function is called to start encryption
**
** Returns TRUE if started
**
*******************************************************************************/
static BOOLEAN btm_sec_start_encryption (tBTM_SEC_DEV_REC *p_dev_rec)
{
if (!btsnd_hcic_set_conn_encrypt (p_dev_rec->hci_handle, TRUE))
return(FALSE);
p_dev_rec->sec_state = BTM_SEC_STATE_ENCRYPTING;
return(TRUE);
}
/*******************************************************************************
**
** Function btm_sec_start_authorization
**
** Description This function is called to start authorization
**
** Returns TRUE if started
**
*******************************************************************************/
static UINT8 btm_sec_start_authorization (tBTM_SEC_DEV_REC *p_dev_rec)
{
UINT8 result;
UINT8 *p_service_name = NULL;
UINT8 service_id;
if ((p_dev_rec->sec_flags & BTM_SEC_NAME_KNOWN)
|| (p_dev_rec->hci_handle == BTM_SEC_INVALID_HANDLE))
{
if (!btm_cb.api.p_authorize_callback)
return(BTM_MODE_UNSUPPORTED);
if (p_dev_rec->p_cur_service)
{
#if BTM_SEC_SERVICE_NAME_LEN > 0
if (p_dev_rec->is_originator)
p_service_name = p_dev_rec->p_cur_service->orig_service_name;
else
p_service_name = p_dev_rec->p_cur_service->term_service_name;
#endif
service_id = p_dev_rec->p_cur_service->service_id;
}
else
service_id = 0;
/* Send authorization request if not already sent during this service connection */
if (p_dev_rec->last_author_service_id == BTM_SEC_NO_LAST_SERVICE_ID
|| p_dev_rec->last_author_service_id != service_id)
{
p_dev_rec->sec_state = BTM_SEC_STATE_AUTHORIZING;
result = (*btm_cb.api.p_authorize_callback) (p_dev_rec->bd_addr,
p_dev_rec->dev_class,
p_dev_rec->sec_bd_name,
p_service_name,
service_id,
p_dev_rec->is_originator);
}
else /* Already authorized once for this L2CAP bringup */
{
BTM_TRACE_DEBUG ("btm_sec_start_authorization: (Ignoring extra Authorization prompt for service %d)", service_id);
return (BTM_SUCCESS);
}
if (result == BTM_SUCCESS)
{
p_dev_rec->sec_flags |= BTM_SEC_AUTHORIZED;
/* Save the currently authorized service in case we are asked again by another multiplexer layer */
if (!p_dev_rec->is_originator)
p_dev_rec->last_author_service_id = service_id;
p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;
}
return(result);
}
btm_sec_start_get_name (p_dev_rec);
return(BTM_CMD_STARTED);
}
/*******************************************************************************
**
** Function btm_sec_are_all_trusted
**
** Description This function is called check if all services are trusted
**
** Returns TRUE if all are trusted, otherwise FALSE
**
*******************************************************************************/
BOOLEAN btm_sec_are_all_trusted(UINT32 p_mask[])
{
UINT32 trusted_inx;
for (trusted_inx = 0; trusted_inx < BTM_SEC_SERVICE_ARRAY_SIZE; trusted_inx++)
{
if (p_mask[trusted_inx] != BTM_SEC_TRUST_ALL)
return(FALSE);
}
return(TRUE);
}
/*******************************************************************************
**
** Function btm_sec_find_first_serv
**
** Description Look for the first record in the service database
** with specified PSM
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
tBTM_SEC_SERV_REC *btm_sec_find_first_serv (CONNECTION_TYPE conn_type, UINT16 psm)
{
tBTM_SEC_SERV_REC *p_serv_rec = &btm_cb.sec_serv_rec[0];
int i;
BOOLEAN is_originator;
#if (L2CAP_UCD_INCLUDED == TRUE)
if ( conn_type & CONNECTION_TYPE_ORIG_MASK )
is_originator = TRUE;
else
is_originator = FALSE;
#else
is_originator = conn_type;
#endif
if (is_originator && btm_cb.p_out_serv && btm_cb.p_out_serv->psm == psm)
{
/* If this is outgoing connection and the PSM matches p_out_serv,
* use it as the current service */
return btm_cb.p_out_serv;
}
/* otherwise, just find the first record with the specified PSM */
for (i = 0; i < BTM_SEC_MAX_SERVICE_RECORDS; i++, p_serv_rec++)
{
if ( (p_serv_rec->security_flags & BTM_SEC_IN_USE) && (p_serv_rec->psm == psm) )
return(p_serv_rec);
}
return(NULL);
}
/*******************************************************************************
**
** Function btm_sec_find_next_serv
**
** Description Look for the next record in the service database
** with specified PSM
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
static tBTM_SEC_SERV_REC *btm_sec_find_next_serv (tBTM_SEC_SERV_REC *p_cur)
{
tBTM_SEC_SERV_REC *p_serv_rec = &btm_cb.sec_serv_rec[0];
int i;
for (i = 0; i < BTM_SEC_MAX_SERVICE_RECORDS; i++, p_serv_rec++)
{
if ((p_serv_rec->security_flags & BTM_SEC_IN_USE)
&& (p_serv_rec->psm == p_cur->psm) )
{
if (p_cur != p_serv_rec)
{
return(p_serv_rec);
}
}
}
return(NULL);
}
/*******************************************************************************
**
** Function btm_sec_find_mx_serv
**
** Description Look for the record in the service database with specified
** PSM and multiplexor channel information
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
static tBTM_SEC_SERV_REC *btm_sec_find_mx_serv (UINT8 is_originator, UINT16 psm,
UINT32 mx_proto_id, UINT32 mx_chan_id)
{
tBTM_SEC_SERV_REC *p_out_serv = btm_cb.p_out_serv;
tBTM_SEC_SERV_REC *p_serv_rec = &btm_cb.sec_serv_rec[0];
int i;
BTM_TRACE_DEBUG ("%s()", __func__);
if (is_originator && p_out_serv && p_out_serv->psm == psm
&& p_out_serv->mx_proto_id == mx_proto_id
&& p_out_serv->orig_mx_chan_id == mx_chan_id)
{
/* If this is outgoing connection and the parameters match p_out_serv,
* use it as the current service */
return btm_cb.p_out_serv;
}
/* otherwise, the old way */
for (i = 0; i < BTM_SEC_MAX_SERVICE_RECORDS; i++, p_serv_rec++)
{
if ((p_serv_rec->security_flags & BTM_SEC_IN_USE)
&& (p_serv_rec->psm == psm)
&& (p_serv_rec->mx_proto_id == mx_proto_id)
&& (( is_originator && (p_serv_rec->orig_mx_chan_id == mx_chan_id))
|| (!is_originator && (p_serv_rec->term_mx_chan_id == mx_chan_id))))
{
return(p_serv_rec);
}
}
return(NULL);
}
/*******************************************************************************
**
** Function btm_sec_collision_timeout
**
** Description Encryption could not start because of the collision
** try to do it again
**
** Returns Pointer to the TLE struct
**
*******************************************************************************/
static void btm_sec_collision_timeout(UNUSED_ATTR void *data)
{
BTM_TRACE_EVENT ("%s()", __func__);
tBTM_STATUS status = btm_sec_execute_procedure (btm_cb.p_collided_dev_rec);
/* If result is pending reply from the user or from the device is pending */
if (status != BTM_CMD_STARTED)
{
/* There is no next procedure or start of procedure failed, notify the waiting layer */
btm_sec_dev_rec_cback_event (btm_cb.p_collided_dev_rec, status, FALSE);
}
}
/*******************************************************************************
**
** Function btm_sec_link_key_request
**
** Description This function is called when controller requests link key
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
static void btm_send_link_key_notif (tBTM_SEC_DEV_REC *p_dev_rec)
{
if (btm_cb.api.p_link_key_callback)
(*btm_cb.api.p_link_key_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class,
p_dev_rec->sec_bd_name, p_dev_rec->link_key,
p_dev_rec->link_key_type);
}
/*******************************************************************************
**
** Function BTM_ReadTrustedMask
**
** Description Get trusted mask for the peer device
**
** Parameters: bd_addr - Address of the device
**
** Returns NULL, if the device record is not found.
** otherwise, the trusted mask
**
*******************************************************************************/
UINT32 * BTM_ReadTrustedMask (BD_ADDR bd_addr)
{
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bd_addr);
if (p_dev_rec != NULL)
return(p_dev_rec->trusted_mask);
return NULL;
}
/*******************************************************************************
**
** Function btm_restore_mode
**
** Description This function returns the security mode to previous setting
** if it was changed during bonding.
**
**
** Parameters: void
**
*******************************************************************************/
static void btm_restore_mode(void)
{
if (btm_cb.security_mode_changed)
{
btm_cb.security_mode_changed = FALSE;
BTM_TRACE_DEBUG("%s() Auth enable -> %d", __func__, (btm_cb.security_mode == BTM_SEC_MODE_LINK));
btsnd_hcic_write_auth_enable ((UINT8)(btm_cb.security_mode == BTM_SEC_MODE_LINK));
}
if (btm_cb.pin_type_changed)
{
btm_cb.pin_type_changed = FALSE;
btsnd_hcic_write_pin_type (btm_cb.cfg.pin_type);
}
}
bool is_sec_state_equal(void *data, void *context)
{
tBTM_SEC_DEV_REC *p_dev_rec = data;
UINT8 *state = context;
if (p_dev_rec->sec_state == *state)
return false;
return true;
}
/*******************************************************************************
**
** Function btm_sec_find_dev_by_sec_state
**
** Description Look for the record in the device database for the device
** which is being authenticated or encrypted
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
tBTM_SEC_DEV_REC *btm_sec_find_dev_by_sec_state (UINT8 state)
{
list_node_t *n = list_foreach(btm_cb.sec_dev_rec, is_sec_state_equal, &state);
if (n)
return list_node(n);
return NULL;
}
/*******************************************************************************
**
** Function btm_sec_change_pairing_state
**
** Description This function is called to change pairing state
**
*******************************************************************************/
static void btm_sec_change_pairing_state (tBTM_PAIRING_STATE new_state)
{
tBTM_PAIRING_STATE old_state = btm_cb.pairing_state;
BTM_TRACE_EVENT ("%s() Old: %s", __func__, btm_pair_state_descr(btm_cb.pairing_state));
BTM_TRACE_EVENT ("%s() New: %s pairing_flags:0x%x", __func__,
btm_pair_state_descr(new_state), btm_cb.pairing_flags);
btm_cb.pairing_state = new_state;
if (new_state == BTM_PAIR_STATE_IDLE)
{
alarm_cancel(btm_cb.pairing_timer);
btm_cb.pairing_flags = 0;
btm_cb.pin_code_len = 0;
/* Make sure the the lcb shows we are not bonding */
l2cu_update_lcb_4_bonding (btm_cb.pairing_bda, FALSE);
btm_restore_mode();
btm_sec_check_pending_reqs();
btm_inq_clear_ssp();
memset (btm_cb.pairing_bda, 0xFF, BD_ADDR_LEN);
}
else
{
/* If transitioning out of idle, mark the lcb as bonding */
if (old_state == BTM_PAIR_STATE_IDLE)
l2cu_update_lcb_4_bonding (btm_cb.pairing_bda, TRUE);
alarm_set_on_queue(btm_cb.pairing_timer,
BTM_SEC_TIMEOUT_VALUE * 1000,
btm_sec_pairing_timeout, NULL,
btu_general_alarm_queue);
}
}
/*******************************************************************************
**
** Function btm_pair_state_descr
**
** Description Return state description for tracing
**
*******************************************************************************/
#if (BT_USE_TRACES == TRUE)
static char *btm_pair_state_descr (tBTM_PAIRING_STATE state)
{
#if (BT_TRACE_VERBOSE == TRUE)
switch (state)
{
case BTM_PAIR_STATE_IDLE: return("IDLE");
case BTM_PAIR_STATE_GET_REM_NAME: return("GET_REM_NAME");
case BTM_PAIR_STATE_WAIT_PIN_REQ: return("WAIT_PIN_REQ");
case BTM_PAIR_STATE_WAIT_LOCAL_PIN: return("WAIT_LOCAL_PIN");
case BTM_PAIR_STATE_WAIT_NUMERIC_CONFIRM: return("WAIT_NUM_CONFIRM");
case BTM_PAIR_STATE_KEY_ENTRY: return("KEY_ENTRY");
case BTM_PAIR_STATE_WAIT_LOCAL_OOB_RSP: return("WAIT_LOCAL_OOB_RSP");
case BTM_PAIR_STATE_WAIT_LOCAL_IOCAPS: return("WAIT_LOCAL_IOCAPS");
case BTM_PAIR_STATE_INCOMING_SSP: return("INCOMING_SSP");
case BTM_PAIR_STATE_WAIT_AUTH_COMPLETE: return("WAIT_AUTH_COMPLETE");
case BTM_PAIR_STATE_WAIT_DISCONNECT: return("WAIT_DISCONNECT");
}
return("???");
#else
sprintf(btm_cb.state_temp_buffer,"%hhu",state);
return(btm_cb.state_temp_buffer);
#endif
}
#endif
/*******************************************************************************
**
** Function btm_sec_dev_rec_cback_event
**
** Description This function calls the callback function with the given
** result and clear the callback function.
**
** Parameters: void
**
*******************************************************************************/
void btm_sec_dev_rec_cback_event (tBTM_SEC_DEV_REC *p_dev_rec, UINT8 res, BOOLEAN is_le_transport)
{
tBTM_SEC_CALLBACK *p_callback = p_dev_rec->p_callback;
if (p_dev_rec->p_callback)
{
p_dev_rec->p_callback = NULL;
#if BLE_INCLUDED == TRUE
if (is_le_transport)
(*p_callback) (p_dev_rec->ble.pseudo_addr, BT_TRANSPORT_LE, p_dev_rec->p_ref_data, res);
else
#endif
(*p_callback) (p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR, p_dev_rec->p_ref_data, res);
}
btm_sec_check_pending_reqs();
}
/*******************************************************************************
**
** Function btm_sec_queue_mx_request
**
** Description Return state description for tracing
**
*******************************************************************************/
static BOOLEAN btm_sec_queue_mx_request (BD_ADDR bd_addr, UINT16 psm, BOOLEAN is_orig,
UINT32 mx_proto_id, UINT32 mx_chan_id,
tBTM_SEC_CALLBACK *p_callback, void *p_ref_data)
{
tBTM_SEC_QUEUE_ENTRY *p_e = (tBTM_SEC_QUEUE_ENTRY *)osi_malloc(sizeof(tBTM_SEC_QUEUE_ENTRY));
p_e->psm = psm;
p_e->is_orig = is_orig;
p_e->p_callback = p_callback;
p_e->p_ref_data = p_ref_data;
p_e->mx_proto_id = mx_proto_id;
p_e->mx_chan_id = mx_chan_id;
p_e->transport = BT_TRANSPORT_BR_EDR;
p_e->sec_act = 0;
memcpy(p_e->bd_addr, bd_addr, BD_ADDR_LEN);
BTM_TRACE_EVENT("%s() PSM: 0x%04x Is_Orig: %u mx_proto_id: %u mx_chan_id: %u",
__func__, psm, is_orig, mx_proto_id, mx_chan_id);
fixed_queue_enqueue(btm_cb.sec_pending_q, p_e);
return TRUE;
}
static BOOLEAN btm_sec_check_prefetch_pin (tBTM_SEC_DEV_REC *p_dev_rec)
{
UINT8 major = (UINT8)(p_dev_rec->dev_class[1] & BTM_COD_MAJOR_CLASS_MASK);
UINT8 minor = (UINT8)(p_dev_rec->dev_class[2] & BTM_COD_MINOR_CLASS_MASK);
BOOLEAN rv = FALSE;
if ((major == BTM_COD_MAJOR_AUDIO)
&& ((minor == BTM_COD_MINOR_CONFM_HANDSFREE) || (minor == BTM_COD_MINOR_CAR_AUDIO)) )
{
BTM_TRACE_EVENT ("%s() Skipping pre-fetch PIN for carkit COD Major: 0x%02x Minor: 0x%02x",
__func__, major, minor);
if (btm_cb.security_mode_changed == FALSE)
{
btm_cb.security_mode_changed = TRUE;
#ifdef APPL_AUTH_WRITE_EXCEPTION
if(!(APPL_AUTH_WRITE_EXCEPTION)(p_dev_rec->bd_addr))
#endif
btsnd_hcic_write_auth_enable (TRUE);
}
}
else
{
btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_LOCAL_PIN);
/* If we got a PIN, use that, else try to get one */
if (btm_cb.pin_code_len)
{
BTM_PINCodeReply (p_dev_rec->bd_addr, BTM_SUCCESS, btm_cb.pin_code_len, btm_cb.pin_code, p_dev_rec->trusted_mask);
}
else
{
/* pin was not supplied - pre-fetch pin code now */
if (btm_cb.api.p_pin_callback && ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_PIN_REQD) == 0))
{
BTM_TRACE_DEBUG("%s() PIN code callback called", __func__);
if (btm_bda_to_acl(p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR) == NULL)
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_dev_rec->sec_bd_name, (p_dev_rec->p_cur_service == NULL) ? FALSE
: (p_dev_rec->p_cur_service->security_flags
& BTM_SEC_IN_MIN_16_DIGIT_PIN));
}
}
rv = TRUE;
}
return rv;
}
/*******************************************************************************
**
** Function btm_sec_auth_payload_tout
**
** Description Processes the HCI Autheniticated Payload Timeout Event
** indicating that a packet containing a valid MIC on the
** connection handle was not received within the programmed
** timeout value. (Spec Default is 30 secs, but can be
** changed via the BTM_SecSetAuthPayloadTimeout() function.
**
*******************************************************************************/
void btm_sec_auth_payload_tout (UINT8 *p, UINT16 hci_evt_len)
{
UINT16 handle;
STREAM_TO_UINT16 (handle, p);
handle = HCID_GET_HANDLE (handle);
/* Will be exposed to upper layers in the future if/when determined necessary */
BTM_TRACE_ERROR ("%s on handle 0x%02x", __func__, handle);
}
/*******************************************************************************
**
** Function btm_sec_queue_encrypt_request
**
** Description encqueue encryption request when device has active security
** process pending.
**
*******************************************************************************/
static BOOLEAN btm_sec_queue_encrypt_request (BD_ADDR bd_addr, tBT_TRANSPORT transport,
tBTM_SEC_CALLBACK *p_callback, void *p_ref_data,
tBTM_BLE_SEC_ACT sec_act)
{
tBTM_SEC_QUEUE_ENTRY *p_e =
(tBTM_SEC_QUEUE_ENTRY *)osi_malloc(sizeof(tBTM_SEC_QUEUE_ENTRY) + 1);
p_e->psm = 0; /* if PSM 0, encryption request */
p_e->p_callback = p_callback;
p_e->p_ref_data = p_ref_data;
p_e->transport = transport;
p_e->sec_act = sec_act;
memcpy(p_e->bd_addr, bd_addr, BD_ADDR_LEN);
fixed_queue_enqueue(btm_cb.sec_pending_q, p_e);
return TRUE;
}
/*******************************************************************************
**
** Function btm_sec_set_peer_sec_caps
**
** Description This function is called to set sm4 and rmt_sec_caps fields
** based on the available peer device features.
**
** Returns void
**
*******************************************************************************/
void btm_sec_set_peer_sec_caps(tACL_CONN *p_acl_cb, tBTM_SEC_DEV_REC *p_dev_rec)
{
BD_ADDR rem_bd_addr;
UINT8 *p_rem_bd_addr;
if ((btm_cb.security_mode == BTM_SEC_MODE_SP ||
btm_cb.security_mode == BTM_SEC_MODE_SP_DEBUG ||
btm_cb.security_mode == BTM_SEC_MODE_SC) &&
HCI_SSP_HOST_SUPPORTED(p_acl_cb->peer_lmp_features[HCI_EXT_FEATURES_PAGE_1]))
{
p_dev_rec->sm4 = BTM_SM4_TRUE;
p_dev_rec->remote_supports_secure_connections =
(HCI_SC_HOST_SUPPORTED(p_acl_cb->peer_lmp_features[HCI_EXT_FEATURES_PAGE_1]));
}
else
{
p_dev_rec->sm4 = BTM_SM4_KNOWN;
p_dev_rec->remote_supports_secure_connections = FALSE;
}
BTM_TRACE_API("%s: sm4: 0x%02x, rmt_support_for_secure_connections %d", __FUNCTION__,
p_dev_rec->sm4, p_dev_rec->remote_supports_secure_connections);
if (p_dev_rec->remote_features_needed)
{
BTM_TRACE_EVENT("%s: Now device in SC Only mode, waiting for peer remote features!",
__FUNCTION__);
p_rem_bd_addr = (UINT8*) rem_bd_addr;
BDADDR_TO_STREAM(p_rem_bd_addr, p_dev_rec->bd_addr);
p_rem_bd_addr = (UINT8*) rem_bd_addr;
btm_io_capabilities_req(p_rem_bd_addr);
p_dev_rec->remote_features_needed = FALSE;
}
}
/*******************************************************************************
**
** Function btm_sec_is_serv_level0
**
** Description This function is called to check if the service corresponding
** to PSM is security mode 4 level 0 service.
**
** Returns TRUE if the service is security mode 4 level 0 service
**
*******************************************************************************/
static BOOLEAN btm_sec_is_serv_level0(UINT16 psm)
{
if (psm == BT_PSM_SDP)
{
BTM_TRACE_DEBUG("%s: PSM: 0x%04x -> mode 4 level 0 service", __FUNCTION__, psm);
return TRUE;
}
return FALSE;
}
/*******************************************************************************
**
** Function btm_sec_check_pending_enc_req
**
** Description This function is called to send pending encryption callback if
** waiting
**
** Returns void
**
*******************************************************************************/
static void btm_sec_check_pending_enc_req (tBTM_SEC_DEV_REC *p_dev_rec, tBT_TRANSPORT transport,
UINT8 encr_enable)
{
if (fixed_queue_is_empty(btm_cb.sec_pending_q))
return;
UINT8 res = encr_enable ? BTM_SUCCESS : BTM_ERR_PROCESSING;
list_t *list = fixed_queue_get_list(btm_cb.sec_pending_q);
for (const list_node_t *node = list_begin(list); node != list_end(list); ) {
tBTM_SEC_QUEUE_ENTRY *p_e = (tBTM_SEC_QUEUE_ENTRY *)list_node(node);
node = list_next(node);
if (memcmp(p_e->bd_addr, p_dev_rec->bd_addr, BD_ADDR_LEN) == 0 && p_e->psm == 0
#if BLE_INCLUDED == TRUE
&& p_e->transport == transport
#endif
)
{
if (encr_enable == 0 || transport == BT_TRANSPORT_BR_EDR
#if BLE_INCLUDED == TRUE
|| p_e->sec_act == BTM_BLE_SEC_ENCRYPT
|| p_e->sec_act == BTM_BLE_SEC_ENCRYPT_NO_MITM
|| (p_e->sec_act == BTM_BLE_SEC_ENCRYPT_MITM && p_dev_rec->sec_flags
& BTM_SEC_LE_AUTHENTICATED)
#endif
)
{
if (p_e->p_callback)
(*p_e->p_callback) (p_dev_rec->bd_addr, transport, p_e->p_ref_data, res);
fixed_queue_try_remove_from_queue(btm_cb.sec_pending_q, (void *)p_e);
}
}
}
}
/*******************************************************************************
**
** Function btm_sec_set_serv_level4_flags
**
** Description This function is called to set security mode 4 level 4 flags.
**
** Returns service security requirements updated to include secure
** connections only mode.
**
*******************************************************************************/
static UINT16 btm_sec_set_serv_level4_flags(UINT16 cur_security, BOOLEAN is_originator)
{
UINT16 sec_level4_flags = is_originator ? BTM_SEC_OUT_LEVEL4_FLAGS : BTM_SEC_IN_LEVEL4_FLAGS;
return cur_security | sec_level4_flags;
}
/*******************************************************************************
**
** Function btm_sec_clear_ble_keys
**
** Description This function is called to clear out the BLE keys.
** Typically when devices are removed in BTM_SecDeleteDevice,
** or when a new BT Link key is generated.
**
** Returns void
**
*******************************************************************************/
void btm_sec_clear_ble_keys (tBTM_SEC_DEV_REC *p_dev_rec)
{
BTM_TRACE_DEBUG ("%s() Clearing BLE Keys", __func__);
#if (SMP_INCLUDED== TRUE)
p_dev_rec->ble.key_type = BTM_LE_KEY_NONE;
memset (&p_dev_rec->ble.keys, 0, sizeof(tBTM_SEC_BLE_KEYS));
#if (BLE_PRIVACY_SPT == TRUE)
btm_ble_resolving_list_remove_dev(p_dev_rec);
#endif
#endif
}
/*******************************************************************************
**
** Function btm_sec_is_a_bonded_dev
**
** Description Is the specified device is a bonded device
**
** Returns TRUE - dev is bonded
**
*******************************************************************************/
BOOLEAN btm_sec_is_a_bonded_dev (BD_ADDR bda)
{
tBTM_SEC_DEV_REC *p_dev_rec= btm_find_dev (bda);
BOOLEAN is_bonded= FALSE;
if (p_dev_rec &&
#if (SMP_INCLUDED == TRUE)
((p_dev_rec->ble.key_type && (p_dev_rec->sec_flags & BTM_SEC_LE_LINK_KEY_KNOWN))||
#else
(
#endif
(p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN)))
{
is_bonded = TRUE;
}
BTM_TRACE_DEBUG ("%s() is_bonded=%d", __func__, is_bonded);
return(is_bonded);
}
/*******************************************************************************
**
** Function btm_sec_is_le_capable_dev
**
** Description Is the specified device is dual mode or LE only device
**
** Returns TRUE - dev is a dual mode
**
*******************************************************************************/
BOOLEAN btm_sec_is_le_capable_dev (BD_ADDR bda)
{
tBTM_SEC_DEV_REC *p_dev_rec= btm_find_dev (bda);
BOOLEAN le_capable = FALSE;
#if (BLE_INCLUDED== TRUE)
if (p_dev_rec && (p_dev_rec->device_type & BT_DEVICE_TYPE_BLE) == BT_DEVICE_TYPE_BLE)
le_capable = TRUE;
#endif
return le_capable;
}
/*******************************************************************************
**
** Function btm_sec_use_smp_br_chnl
**
** Description The function checks if SMP BR connection can be used with
** the peer.
** Is called when authentication for dedicated bonding is
** successfully completed.
**
** Returns TRUE - if SMP BR connection can be used (the link key is
** generated from P-256 and the peer supports Security
** Manager over BR).
**
*******************************************************************************/
static BOOLEAN btm_sec_use_smp_br_chnl(tBTM_SEC_DEV_REC *p_dev_rec)
{
UINT32 ext_feat;
UINT8 chnl_mask[L2CAP_FIXED_CHNL_ARRAY_SIZE];
BTM_TRACE_DEBUG ("%s() link_key_type = 0x%x", __func__,
p_dev_rec->link_key_type);
if ((p_dev_rec->link_key_type != BTM_LKEY_TYPE_UNAUTH_COMB_P_256) &&
(p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256))
return FALSE;
if (!L2CA_GetPeerFeatures (p_dev_rec->bd_addr, &ext_feat, chnl_mask))
return FALSE;
if (!(chnl_mask[0] & L2CAP_FIXED_CHNL_SMP_BR_BIT))
return FALSE;
return TRUE;
}
/*******************************************************************************
**
** Function btm_sec_is_master
**
** Description The function checks if the device is BR/EDR master after
** pairing is completed.
**
** Returns TRUE - if the device is master.
**
*******************************************************************************/
static BOOLEAN btm_sec_is_master(tBTM_SEC_DEV_REC *p_dev_rec)
{
tACL_CONN *p= btm_bda_to_acl(p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR);
return (p && (p->link_role == BTM_ROLE_MASTER));
}