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ara-mdk / platform / external / bluetooth / bluedroid / 2c7778fd055025367f96dca357dcf46e6fcd46cb / . / stack / smp / smp_act.c
blob: 73f4811397b3dc8bc2bfae3fb738ba98a671709f [file] [log] [blame]
/******************************************************************************
*
* Copyright (C) 2003-2012 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.
*
******************************************************************************/
#include "bt_target.h"
#if SMP_INCLUDED == TRUE
#include <string.h>
#include "btm_int.h"
#include "l2c_api.h"
#include "smp_int.h"
const UINT8 smp_association_table[2][SMP_IO_CAP_MAX][SMP_IO_CAP_MAX] =
{
/* initiator */
{{SMP_MODEL_ENC_ONLY, SMP_MODEL_ENC_ONLY, SMP_MODEL_PASSKEY, SMP_MODEL_ENC_ONLY, SMP_MODEL_PASSKEY}, /* Display Only */
{SMP_MODEL_ENC_ONLY, SMP_MODEL_ENC_ONLY, SMP_MODEL_PASSKEY, SMP_MODEL_ENC_ONLY, SMP_MODEL_PASSKEY}, /* SMP_CAP_IO = 1 */
{SMP_MODEL_KEY_NOTIF, SMP_MODEL_KEY_NOTIF, SMP_MODEL_PASSKEY, SMP_MODEL_ENC_ONLY, SMP_MODEL_KEY_NOTIF}, /* keyboard only */
{SMP_MODEL_ENC_ONLY, SMP_MODEL_ENC_ONLY, SMP_MODEL_ENC_ONLY, SMP_MODEL_ENC_ONLY, SMP_MODEL_ENC_ONLY},/* No Input No Output */
{SMP_MODEL_KEY_NOTIF, SMP_MODEL_KEY_NOTIF, SMP_MODEL_PASSKEY, SMP_MODEL_ENC_ONLY, SMP_MODEL_KEY_NOTIF}}, /* keyboard display */
/* responder */
{{SMP_MODEL_ENC_ONLY, SMP_MODEL_ENC_ONLY, SMP_MODEL_KEY_NOTIF, SMP_MODEL_ENC_ONLY, SMP_MODEL_KEY_NOTIF}, /* Display Only */
{SMP_MODEL_ENC_ONLY, SMP_MODEL_ENC_ONLY, SMP_MODEL_KEY_NOTIF, SMP_MODEL_ENC_ONLY, SMP_MODEL_KEY_NOTIF}, /* SMP_CAP_IO = 1 */
{SMP_MODEL_PASSKEY, SMP_MODEL_PASSKEY, SMP_MODEL_PASSKEY, SMP_MODEL_ENC_ONLY, SMP_MODEL_PASSKEY}, /* keyboard only */
{SMP_MODEL_ENC_ONLY, SMP_MODEL_ENC_ONLY, SMP_MODEL_ENC_ONLY, SMP_MODEL_ENC_ONLY, SMP_MODEL_ENC_ONLY},/* No Input No Output */
{SMP_MODEL_PASSKEY, SMP_MODEL_PASSKEY, SMP_MODEL_KEY_NOTIF, SMP_MODEL_ENC_ONLY, SMP_MODEL_PASSKEY}} /* keyboard display */
/* display only */ /*SMP_CAP_IO = 1 */ /* keyboard only */ /* No InputOutput */ /* keyboard display */
};
const tSMP_ACT smp_distribute_act [] =
{
smp_generate_ltk,
smp_send_id_info,
smp_generate_csrk
};
/*******************************************************************************
** Function smp_update_key_mask
** Description This function updates the key mask for sending or receiving.
*******************************************************************************/
static void smp_update_key_mask (tSMP_CB *p_cb, UINT8 key_type, BOOLEAN recv)
{
SMP_TRACE_DEBUG0 ("smp_update_key_mask ");
SMP_TRACE_DEBUG4("before update role=%d recv=%d loc_i_key = %02x, loc_r_key = %02x", p_cb->role, recv, p_cb->loc_i_key, p_cb->loc_r_key);
if (p_cb->role == HCI_ROLE_SLAVE)
{
if (recv)
p_cb->loc_i_key &= ~key_type;
else
p_cb->loc_r_key &= ~key_type;
}
else
{
if (recv)
p_cb->loc_r_key &= ~key_type;
else
p_cb->loc_i_key &= ~key_type;
}
SMP_TRACE_DEBUG2("updated loc_i_key = %02x, loc_r_key = %02x", p_cb->loc_i_key, p_cb->loc_r_key);
}
/*******************************************************************************
** Function smp_io_cap_req
** Description send SMP IO request
*******************************************************************************/
void smp_send_app_cback(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
tSMP_EVT_DATA cb_data;
tSMP_STATUS callback_rc;
SMP_TRACE_DEBUG1 ("smp_send_app_cback p_cb->cb_evt=%d", p_cb->cb_evt );
if (p_cb->p_callback && p_cb->cb_evt != 0)
{
if (p_cb->cb_evt == SMP_IO_CAP_REQ_EVT)
{
cb_data.io_req.auth_req = p_cb->peer_auth_req;
cb_data.io_req.oob_data = SMP_OOB_NONE;
cb_data.io_req.io_cap = SMP_DEFAULT_IO_CAPS;
cb_data.io_req.max_key_size = SMP_MAX_ENC_KEY_SIZE;
cb_data.io_req.init_keys = p_cb->loc_i_key ;
cb_data.io_req.resp_keys = p_cb->loc_r_key ;
SMP_TRACE_WARNING1( "io_cap = %d",cb_data.io_req.io_cap);
}
callback_rc = (*p_cb->p_callback)(p_cb->cb_evt, p_cb->pairing_bda, &cb_data);
SMP_TRACE_DEBUG2 ("callback_rc=%d p_cb->cb_evt=%d",callback_rc, p_cb->cb_evt );
if (callback_rc == SMP_SUCCESS && p_cb->cb_evt == SMP_IO_CAP_REQ_EVT)
{
p_cb->loc_auth_req = cb_data.io_req.auth_req;
p_cb->loc_io_caps = cb_data.io_req.io_cap;
p_cb->loc_oob_flag = cb_data.io_req.oob_data;
p_cb->loc_enc_size = cb_data.io_req.max_key_size;
p_cb->loc_i_key = cb_data.io_req.init_keys;
p_cb->loc_r_key = cb_data.io_req.resp_keys;
SMP_TRACE_WARNING2( "new io_cap = %d p_cb->loc_enc_size = %d",p_cb->loc_io_caps, p_cb->loc_enc_size);
smp_sm_event(p_cb, SMP_IO_RSP_EVT, NULL);
}
}
if (!p_cb->cb_evt && p_cb->discard_sec_req)
{
p_cb->discard_sec_req = FALSE;
smp_sm_event(p_cb, SMP_DISCARD_SEC_REQ_EVT, NULL);
}
SMP_TRACE_DEBUG0 ("smp_send_app_cback return");
}
/*******************************************************************************
** Function smp_send_pair_fail
** Description pairing failure to peer device if needed.
*******************************************************************************/
void smp_send_pair_fail(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
p_cb->status = *(UINT8 *)p_data;
p_cb->failure = *(UINT8 *)p_data;
SMP_TRACE_DEBUG2 ("smp_send_pair_fail status=%d failure=%d ",p_cb->status, p_cb->failure);
if (p_cb->status <= SMP_REPEATED_ATTEMPTS && p_cb->status != SMP_SUCCESS)
{
smp_send_cmd(SMP_OPCODE_PAIRING_FAILED, p_cb);
}
}
/*******************************************************************************
** Function smp_send_pair_req
** Description process pairing request to slave device
*******************************************************************************/
void smp_send_pair_req(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (p_cb->pairing_bda);
SMP_TRACE_DEBUG0 ("smp_send_pair_req ");
/* erase all keys when master sends pairing req*/
if (p_dev_rec)
btm_sec_clear_ble_keys(p_dev_rec);
/* do not manipulate the key, let app decide,
leave out to BTM to mandate key distribution for bonding case */
smp_send_cmd(SMP_OPCODE_PAIRING_REQ, p_cb);
}
/*******************************************************************************
** Function smp_send_pair_rsp
** Description process pairing response to slave device
*******************************************************************************/
void smp_send_pair_rsp(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
SMP_TRACE_DEBUG0 ("smp_send_pair_rsp ");
p_cb->loc_i_key &= p_cb->peer_i_key;
p_cb->loc_r_key &= p_cb->peer_r_key;
if (smp_send_cmd (SMP_OPCODE_PAIRING_RSP, p_cb))
{
smp_decide_asso_model(p_cb, NULL);
}
}
/*******************************************************************************
** Function smp_send_pair_request
** Description process pairing request to slave device
*******************************************************************************/
void smp_send_confirm(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
SMP_TRACE_DEBUG0 ("smp_send_confirm ");
smp_send_cmd(SMP_OPCODE_CONFIRM, p_cb);
}
/*******************************************************************************
** Function smp_send_init
** Description process pairing initializer to slave device
*******************************************************************************/
void smp_send_init(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
SMP_TRACE_DEBUG0 ("smp_send_init ");
#if SMP_CONFORMANCE_TESTING == TRUE
if (p_cb->enable_test_rand_val)
{
SMP_TRACE_DEBUG0 ("Use rand value from script");
memcpy(p_cb->rand, p_cb->test_rand, BT_OCTET16_LEN);
}
#endif
smp_send_cmd(SMP_OPCODE_INIT, p_cb);
}
/*******************************************************************************
** Function smp_send_enc_info
** Description send security information command.
*******************************************************************************/
void smp_send_enc_info(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
tBTM_LE_LENC_KEYS le_key;
SMP_TRACE_DEBUG1 ("smp_send_enc_info p_cb->loc_enc_size = %d", p_cb->loc_enc_size);
smp_update_key_mask (p_cb, SMP_SEC_KEY_TYPE_ENC, FALSE);
smp_send_cmd(SMP_OPCODE_ENCRYPT_INFO, p_cb);
smp_send_cmd(SMP_OPCODE_MASTER_ID, p_cb);
/* save the DIV and key size information when acting as slave device */
le_key.div = p_cb->div;
le_key.key_size = p_cb->loc_enc_size;
le_key.sec_level = p_cb->sec_level;
btm_sec_save_le_key(p_cb->pairing_bda, BTM_LE_KEY_LENC, (tBTM_LE_KEY_VALUE *)&le_key, TRUE);
SMP_TRACE_WARNING0( "smp_send_enc_info");
smp_key_distribution(p_cb, NULL);
}
/*******************************************************************************
** Function smp_send_id_info
** Description send ID information command.
*******************************************************************************/
void smp_send_id_info(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
SMP_TRACE_DEBUG0 ("smp_send_id_info ");
smp_update_key_mask (p_cb, SMP_SEC_KEY_TYPE_ID, FALSE);
smp_send_cmd(SMP_OPCODE_IDENTITY_INFO, p_cb);
smp_send_cmd(SMP_OPCODE_ID_ADDR, p_cb);
SMP_TRACE_WARNING0( "smp_send_id_info");
smp_key_distribution(p_cb, NULL);
}
/*******************************************************************************
** Function smp_send_csrk_info
** Description send CSRK command.
*******************************************************************************/
void smp_send_csrk_info(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
tBTM_LE_KEY_VALUE key;
SMP_TRACE_DEBUG0 ("smp_send_csrk_info ");
smp_update_key_mask (p_cb, SMP_SEC_KEY_TYPE_CSRK, FALSE);
if (smp_send_cmd(SMP_OPCODE_SIGN_INFO, p_cb))
{
key.lcsrk_key.div = p_cb->div;
key.lcsrk_key.sec_level = p_cb->sec_level;
key.lcsrk_key.counter = 0; /* initialize the local counter */
btm_sec_save_le_key(p_cb->pairing_bda, BTM_LE_KEY_LCSRK, &key, TRUE);
}
smp_key_distribution(p_cb, NULL);
}
/*******************************************************************************
** Function smp_send_ltk_reply
** Description send LTK reply
*******************************************************************************/
void smp_send_ltk_reply(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
SMP_TRACE_DEBUG0 ("smp_send_ltk_reply ");
/* send stk as LTK response */
btm_ble_ltk_request_reply(p_cb->pairing_bda, TRUE, p_data->key.p_data);
}
/*******************************************************************************
** Function smp_proc_sec_req
** Description process security request.
*******************************************************************************/
void smp_proc_sec_req(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
tBTM_LE_AUTH_REQ auth_req = *(tBTM_LE_AUTH_REQ *)p_data;
tBTM_BLE_SEC_REQ_ACT sec_req_act;
SMP_TRACE_DEBUG1 ("smp_proc_sec_req auth_req=0x%x",auth_req);
p_cb->cb_evt = 0;
btm_ble_link_sec_check(p_cb->pairing_bda, auth_req, &sec_req_act);
SMP_TRACE_DEBUG1 ("smp_proc_sec_req sec_req_act=0x%x",sec_req_act);
switch (sec_req_act)
{
case BTM_BLE_SEC_REQ_ACT_ENCRYPT:
SMP_TRACE_DEBUG0 ("smp_proc_sec_req BTM_BLE_SEC_REQ_ACT_ENCRYPT");
smp_sm_event(p_cb, SMP_ENC_REQ_EVT, NULL);
break;
case BTM_BLE_SEC_REQ_ACT_PAIR:
/* initialize local i/r key to be default keys */
SMP_TRACE_DEBUG0 ("smp_proc_sec_req BTM_BLE_SEC_REQ_ACT_PAIR");
p_cb->peer_auth_req = auth_req;
p_cb->loc_r_key = p_cb->loc_i_key = SMP_SEC_DEFAULT_KEY ;
p_cb->cb_evt = SMP_SEC_REQUEST_EVT;
break;
case BTM_BLE_SEC_REQ_ACT_DISCARD:
p_cb->discard_sec_req = TRUE;
break;
default:
/* do nothing */
break;
}
}
/*******************************************************************************
** Function smp_proc_sec_grant
** Description process security grant.
*******************************************************************************/
void smp_proc_sec_grant(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
UINT8 res= *(UINT8 *)p_data;
SMP_TRACE_DEBUG0 ("smp_proc_sec_grant ");
if (res != SMP_SUCCESS)
{
smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, p_data);
}
else /*otherwise, start pairing */
{
/* send IO request callback */
p_cb->cb_evt = SMP_IO_CAP_REQ_EVT;
}
}
/*******************************************************************************
** Function smp_proc_pair_fail
** Description process pairing failure from peer device
*******************************************************************************/
void smp_proc_pair_fail(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
SMP_TRACE_DEBUG0 ("smp_proc_pair_fail ");
p_cb->status = *(UINT8 *)p_data;
}
/*******************************************************************************
** Function smp_proc_pair_cmd
** Description Process the SMP pairing request/response from peer device
*******************************************************************************/
void smp_proc_pair_cmd(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
UINT8 *p = (UINT8 *)p_data;
UINT8 reason = SMP_ENC_KEY_SIZE;
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (p_cb->pairing_bda);
SMP_TRACE_DEBUG0 ("smp_proc_pair_cmd ");
/* erase all keys if it is slave proc pairing req*/
if (p_dev_rec && (p_cb->role == HCI_ROLE_SLAVE))
btm_sec_clear_ble_keys(p_dev_rec);
p_cb->flags |= SMP_PAIR_FLAG_ENC_AFTER_PAIR;
STREAM_TO_UINT8(p_cb->peer_io_caps, p);
STREAM_TO_UINT8(p_cb->peer_oob_flag, p);
STREAM_TO_UINT8(p_cb->peer_auth_req, p);
STREAM_TO_UINT8(p_cb->peer_enc_size, p);
STREAM_TO_UINT8(p_cb->peer_i_key, p);
STREAM_TO_UINT8(p_cb->peer_r_key, p);
#if SMP_CONFORMANCE_TESTING == TRUE
if (p_cb->enable_test_pair_fail)
{
SMP_TRACE_DEBUG0 ("Forced pair fair");
if (p_cb->peer_enc_size < SMP_MIN_ENC_KEY_SIZE)
{
smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &reason);
}
else
{
smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &(p_cb->pair_fail_status));
}
return;
}
#endif
if (p_cb->peer_enc_size < SMP_MIN_ENC_KEY_SIZE)
{
smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &reason);
}
else if (p_cb->role == HCI_ROLE_SLAVE)
{
if (!(p_cb->flags & SMP_PAIR_FLAGS_WE_STARTED_DD))
{
p_cb->loc_i_key = p_cb->peer_i_key;
p_cb->loc_r_key = p_cb->peer_r_key;
}
else /* update local i/r key according to pairing request */
{
p_cb->loc_i_key &= p_cb->peer_i_key;
p_cb->loc_r_key &= p_cb->peer_r_key;
}
p_cb->cb_evt = SMP_SEC_REQUEST_EVT;
}
}
/*******************************************************************************
** Function smp_proc_confirm
** Description process pairing confirm from peer device
*******************************************************************************/
void smp_proc_confirm(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
UINT8 *p = (UINT8 *)p_data;
SMP_TRACE_DEBUG0 ("smp_proc_confirm ");
if (p != NULL)
{
/* save the SConfirm for comparison later */
STREAM_TO_ARRAY(p_cb->rconfirm, p, BT_OCTET16_LEN);
}
p_cb->flags |= SMP_PAIR_FLAGS_CMD_CONFIRM;
}
/*******************************************************************************
** Function smp_proc_init
** Description process pairing initializer from peer device
*******************************************************************************/
void smp_proc_init(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
UINT8 *p = (UINT8 *)p_data;
SMP_TRACE_DEBUG0 ("smp_proc_init ");
/* save the SRand for comparison */
STREAM_TO_ARRAY(p_cb->rrand, p, BT_OCTET16_LEN);
}
/*******************************************************************************
** Function smp_proc_enc_info
** Description process encryption information from peer device
*******************************************************************************/
void smp_proc_enc_info(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
UINT8 *p = (UINT8 *)p_data;
SMP_TRACE_DEBUG0 ("smp_proc_enc_info ");
STREAM_TO_ARRAY(p_cb->ltk, p, BT_OCTET16_LEN);
smp_key_distribution(p_cb, NULL);
}
/*******************************************************************************
** Function smp_proc_master_id
** Description process master ID from slave device
*******************************************************************************/
void smp_proc_master_id(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
UINT8 *p = (UINT8 *)p_data;
tBTM_LE_PENC_KEYS le_key;
SMP_TRACE_DEBUG0 (" smp_proc_master_id");
smp_update_key_mask (p_cb, SMP_SEC_KEY_TYPE_ENC, TRUE);
STREAM_TO_UINT16(le_key.ediv, p);
STREAM_TO_ARRAY(le_key.rand, p, BT_OCTET8_LEN );
/* store the encryption keys from peer device */
memcpy(le_key.ltk, p_cb->ltk, BT_OCTET16_LEN);
le_key.sec_level = p_cb->sec_level;
le_key.key_size = p_cb->loc_enc_size;
btm_sec_save_le_key(p_cb->pairing_bda, BTM_LE_KEY_PENC, (tBTM_LE_KEY_VALUE *)&le_key, TRUE);
smp_key_distribution(p_cb, NULL);
}
/*******************************************************************************
** Function smp_proc_enc_info
** Description process identity information from peer device
*******************************************************************************/
void smp_proc_id_info(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
UINT8 *p = (UINT8 *)p_data;
SMP_TRACE_DEBUG0 ("smp_proc_id_info ");
STREAM_TO_ARRAY (p_cb->tk, p, BT_OCTET16_LEN); /* reuse TK for IRK */
smp_key_distribution(p_cb, NULL);
}
/*******************************************************************************
** Function smp_proc_id_addr
** Description process identity address from peer device
*******************************************************************************/
void smp_proc_id_addr(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
UINT8 *p = (UINT8 *)p_data;
tBTM_LE_PID_KEYS pid_key;
SMP_TRACE_DEBUG0 ("smp_proc_id_addr ");
smp_update_key_mask (p_cb, SMP_SEC_KEY_TYPE_ID, TRUE);
STREAM_TO_UINT8(pid_key.addr_type, p);
STREAM_TO_BDADDR(pid_key.static_addr, p);
memcpy(pid_key.irk, p_cb->tk, BT_OCTET16_LEN);
/* store the ID key from peer device */
btm_sec_save_le_key(p_cb->pairing_bda, BTM_LE_KEY_PID, (tBTM_LE_KEY_VALUE *)&pid_key, TRUE);
smp_key_distribution(p_cb, NULL);
}
/*******************************************************************************
** Function smp_proc_srk_info
** Description process security information from peer device
*******************************************************************************/
void smp_proc_srk_info(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
tBTM_LE_PCSRK_KEYS le_key;
SMP_TRACE_DEBUG0 ("smp_proc_srk_info ");
smp_update_key_mask (p_cb, SMP_SEC_KEY_TYPE_CSRK, TRUE);
/* save CSRK to security record */
le_key.sec_level = p_cb->sec_level;
memcpy (le_key.csrk, p_data, BT_OCTET16_LEN); /* get peer CSRK */
le_key.counter = 0; /* initialize the peer counter */
btm_sec_save_le_key(p_cb->pairing_bda, BTM_LE_KEY_PCSRK, (tBTM_LE_KEY_VALUE *)&le_key, TRUE);
smp_key_distribution(p_cb, NULL);
}
/*******************************************************************************
** Function smp_proc_compare
** Description process compare value
*******************************************************************************/
void smp_proc_compare(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
UINT8 reason;
SMP_TRACE_DEBUG0 ("smp_proc_compare ");
if (
#if SMP_CONFORMANCE_TESTING == TRUE
p_cb->skip_test_compare_check ||
#endif
!memcmp(p_cb->rconfirm, p_data->key.p_data, BT_OCTET16_LEN))
{
/* compare the max encryption key size, and save the smaller one for the link */
if ( p_cb->peer_enc_size < p_cb->loc_enc_size)
p_cb->loc_enc_size = p_cb->peer_enc_size;
if (p_cb->role == HCI_ROLE_SLAVE)
smp_sm_event(p_cb, SMP_RAND_EVT, NULL);
else
{
/* master device always use received i/r key as keys to distribute */
p_cb->loc_i_key = p_cb->peer_i_key;
p_cb->loc_r_key = p_cb->peer_r_key;
smp_sm_event(p_cb, SMP_ENC_REQ_EVT, NULL);
}
}
else
{
reason = p_cb->failure = SMP_CONFIRM_VALUE_ERR;
smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &reason);
}
}
/*******************************************************************************
** Function smp_proc_sl_key
** Description process key ready events.
*******************************************************************************/
void smp_proc_sl_key(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
UINT8 key_type = p_data->key.key_type;
SMP_TRACE_DEBUG0 ("smp_proc_sl_keysmp_proc_sl_key ");
if (key_type == SMP_KEY_TYPE_TK)
{
smp_generate_confirm(p_cb, NULL);
}
else if (key_type == SMP_KEY_TYPE_CFM)
{
smp_set_state(SMP_ST_WAIT_CONFIRM);
if (p_cb->flags & SMP_PAIR_FLAGS_CMD_CONFIRM)
smp_sm_event(p_cb, SMP_CONFIRM_EVT, NULL);
}
}
/*******************************************************************************
** Function smp_start_enc
** Description start encryption
*******************************************************************************/
void smp_start_enc(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
BOOLEAN cmd;
UINT8 reason = SMP_ENC_FAIL;
SMP_TRACE_DEBUG0 ("smp_start_enc ");
if (p_data != NULL)
cmd = btm_ble_start_encrypt(p_cb->pairing_bda, TRUE, p_data->key.p_data);
else
cmd = btm_ble_start_encrypt(p_cb->pairing_bda, FALSE, NULL);
if (!cmd)
smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &reason);
}
/*******************************************************************************
** Function smp_proc_discard
** Description processing for discard security request
*******************************************************************************/
void smp_proc_discard(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
SMP_TRACE_DEBUG0 ("smp_proc_discard ");
smp_reset_control_value(p_cb);
}
/*******************************************************************************
** Function smp_proc_release_delay
** Description process the release delay request
*******************************************************************************/
void smp_proc_release_delay(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
SMP_TRACE_DEBUG0 ("smp_proc_release_delay ");
btu_stop_timer (&p_cb->rsp_timer_ent);
btu_start_timer (&p_cb->rsp_timer_ent, BTU_TTYPE_SMP_PAIRING_CMD,
SMP_WAIT_FOR_REL_DELAY_TOUT);
}
/*******************************************************************************
** Function smp_proc_release_delay_tout
** Description processing the release delay timeout
*******************************************************************************/
void smp_proc_release_delay_tout(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
SMP_TRACE_DEBUG0 ("smp_proc_release_delay_tout ");
btu_stop_timer (&p_cb->rsp_timer_ent);
smp_proc_pairing_cmpl(p_cb);
}
/*******************************************************************************
** Function smp_enc_cmpl
** Description encryption success
*******************************************************************************/
void smp_enc_cmpl(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
UINT8 enc_enable = *(UINT8 *)p_data;
UINT8 reason = enc_enable ? SMP_SUCCESS : SMP_ENC_FAIL;
SMP_TRACE_DEBUG0 ("smp_enc_cmpl ");
smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &reason);
}
/*******************************************************************************
** Function smp_check_auth_req
** Description check authentication request
*******************************************************************************/
void smp_check_auth_req(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
UINT8 enc_enable = *(UINT8 *)p_data;
UINT8 reason = enc_enable ? SMP_SUCCESS : SMP_ENC_FAIL;
SMP_TRACE_DEBUG3 ("smp_check_auth_req enc_enable=%d i_keys=0x%x r_keys=0x%x (i-initiator r-responder)",
enc_enable, p_cb->loc_i_key, p_cb->loc_r_key);
if (enc_enable == 1)
{
if (/*((p_cb->peer_auth_req & SMP_AUTH_BOND) ||
(p_cb->loc_auth_req & SMP_AUTH_BOND)) &&*/
(p_cb->loc_i_key || p_cb->loc_r_key))
{
smp_sm_event(p_cb, SMP_BOND_REQ_EVT, NULL);
}
else
smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &reason);
}
else if (enc_enable == 0)
{
/* if failed for encryption after pairing, send callback */
if (p_cb->flags & SMP_PAIR_FLAG_ENC_AFTER_PAIR)
smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &reason);
/* if enc failed for old security information */
/* if master device, clean up and abck to idle; slave device do nothing */
else if (p_cb->role == HCI_ROLE_MASTER)
{
smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &reason);
}
}
}
/*******************************************************************************
** Function smp_key_pick_key
** Description Pick a key distribution function based on the key mask.
*******************************************************************************/
void smp_key_pick_key(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
UINT8 key_to_dist = (p_cb->role == HCI_ROLE_SLAVE) ? p_cb->loc_r_key : p_cb->loc_i_key;
UINT8 i = 0;
SMP_TRACE_DEBUG1 ("smp_key_pick_key key_to_dist=0x%x", key_to_dist);
while (i < 3)
{
SMP_TRACE_DEBUG2("key to send = %02x, i = %d", key_to_dist, i);
if (key_to_dist & (1 << i))
{
SMP_TRACE_DEBUG1 ("smp_distribute_act[%d]", i);
(* smp_distribute_act[i])(p_cb, p_data);
break;
}
i ++;
}
}
/*******************************************************************************
** Function smp_key_distribution
** Description start key distribution if required.
*******************************************************************************/
void smp_key_distribution(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
UINT8 reason = SMP_SUCCESS;
SMP_TRACE_DEBUG3 ("smp_key_distribution role=%d (0-master) r_keys=0x%x i_keys=0x%x",
p_cb->role, p_cb->loc_r_key, p_cb->loc_i_key);
if (p_cb->role == HCI_ROLE_SLAVE||
(!p_cb->loc_r_key && p_cb->role == HCI_ROLE_MASTER))
{
smp_key_pick_key(p_cb, p_data);
}
if (!p_cb->loc_i_key && !p_cb->loc_r_key)
{
/* state check to prevent re-entrant */
if (smp_get_state() == SMP_ST_BOND_PENDING)
smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &reason);
}
}
/*******************************************************************************
** Function smp_decide_asso_model
** Description This function is called to compare both sides' io capability
** oob data flag and authentication request, and decide the
** association model to use for the authentication.
*******************************************************************************/
void smp_decide_asso_model(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
UINT8 failure = SMP_UNKNOWN_IO_CAP;
tSMP_ASSO_MODEL model = SMP_MODEL_MAX;
UINT8 int_evt = 0;
tSMP_KEY key;
tSMP_INT_DATA *p = NULL;
SMP_TRACE_DEBUG3 ("smp_decide_asso_model p_cb->peer_io_caps = %d p_cb->loc_io_caps = %d \
p_cb->peer_auth_req = %02x",
p_cb->peer_io_caps, p_cb->loc_io_caps, p_cb->peer_auth_req);
/* OOB data present on both devices, use OOB association model */
if (p_cb->peer_oob_flag == SMP_OOB_PRESENT && p_cb->loc_oob_flag == SMP_OOB_PRESENT)
{
model = SMP_MODEL_OOB;
}
/* no MITM required, ignore IO cap, use encryption only */
else if (SMP_NO_MITM_REQUIRED (p_cb->peer_auth_req) &&
SMP_NO_MITM_REQUIRED(p_cb->loc_auth_req))
{
model = SMP_MODEL_ENC_ONLY;
}
else/* use IO capability to decide assiciation model */
{
if (p_cb->peer_io_caps < SMP_IO_CAP_MAX && p_cb->loc_io_caps < SMP_IO_CAP_MAX)
{
if (p_cb->role == HCI_ROLE_MASTER)
model = smp_association_table[p_cb->role][p_cb->peer_io_caps][p_cb->loc_io_caps];
else
model = smp_association_table[p_cb->role][p_cb->loc_io_caps][p_cb->peer_io_caps];
}
}
SMP_TRACE_DEBUG1("Association Model = %d", model);
if (model == SMP_MODEL_OOB)
{
SMP_TRACE_ERROR0("Association Model = SMP_MODEL_OOB");
p_cb->sec_level = SMP_SEC_AUTHENTICATED;
SMP_TRACE_EVENT1 ("p_cb->sec_level =%d (SMP_SEC_AUTHENTICATED) ", p_cb->sec_level );
p_cb->cb_evt = SMP_OOB_REQ_EVT;
int_evt = SMP_TK_REQ_EVT;
}
else if (model == SMP_MODEL_PASSKEY)
{
p_cb->sec_level = SMP_SEC_AUTHENTICATED;
SMP_TRACE_EVENT1 ("p_cb->sec_level =%d (SMP_SEC_AUTHENTICATED) ", p_cb->sec_level );
p_cb->cb_evt = SMP_PASSKEY_REQ_EVT;
int_evt = SMP_TK_REQ_EVT;
}
else if (model == SMP_MODEL_KEY_NOTIF)
{
p_cb->sec_level = SMP_SEC_AUTHENTICATED;
SMP_TRACE_DEBUG0("Need to generate Passkey");
/* generate passkey and notify application */
smp_generate_passkey(p_cb, NULL);
}
else if (model == SMP_MODEL_ENC_ONLY) /* TK = 0, go calculate Confirm */
{
if (p_cb->role == HCI_ROLE_MASTER &&
((p_cb->peer_auth_req & SMP_AUTH_YN_BIT) != 0) &&
((p_cb->loc_auth_req & SMP_AUTH_YN_BIT) == 0))
{
SMP_TRACE_ERROR0("IO capability does not meet authentication requirement");
failure = SMP_PAIR_AUTH_FAIL;
p = (tSMP_INT_DATA *)&failure;
int_evt = SMP_AUTH_CMPL_EVT;
}
else
{
p_cb->sec_level = SMP_SEC_UNAUTHENTICATE;
SMP_TRACE_EVENT1 ("p_cb->sec_level =%d (SMP_SEC_UNAUTHENTICATE) ", p_cb->sec_level );
key.key_type = SMP_KEY_TYPE_TK;
key.p_data = p_cb->tk;
p = (tSMP_INT_DATA *)&key;
memset(p_cb->tk, 0, BT_OCTET16_LEN);
/* TK, ready */
int_evt = SMP_KEY_READY_EVT;
}
}
else if (model == SMP_MODEL_MAX)
{
SMP_TRACE_ERROR0("Association Model = SMP_MODEL_MAX (failed)");
p = (tSMP_INT_DATA *)&failure;
int_evt = SMP_AUTH_CMPL_EVT;
}
SMP_TRACE_EVENT1 ("sec_level=%d ", p_cb->sec_level );
if (int_evt)
smp_sm_event(p_cb, int_evt, p);
}
/*******************************************************************************
** Function smp_proc_io_rsp
** Description process IO response for a slave device.
*******************************************************************************/
void smp_proc_io_rsp(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
SMP_TRACE_DEBUG0 ("smp_proc_io_rsp ");
if (p_cb->flags & SMP_PAIR_FLAGS_WE_STARTED_DD)
{
smp_set_state(SMP_ST_SEC_REQ_PENDING);
smp_send_cmd(SMP_OPCODE_SEC_REQ, p_cb);
}
else /* respond to pairing request */
{
smp_send_pair_rsp(p_cb, NULL);
}
}
/*******************************************************************************
** Function smp_pairing_cmpl
** Description This function is called to send the pairing complete callback
** and remove the connection if needed.
*******************************************************************************/
void smp_pairing_cmpl(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
SMP_TRACE_DEBUG0 ("smp_pairing_cmpl ");
if ((p_cb->status == SMP_SUCCESS) ||
(p_cb->status <= SMP_REPEATED_ATTEMPTS && p_cb->status != SMP_SUCCESS))
{
smp_sm_event(p_cb, SMP_RELEASE_DELAY_EVT, p_data);
}
else
{
/* this will transition to idle state right away */
smp_sm_event(p_cb, SMP_RELEASE_DELAY_TOUT_EVT, p_data);
}
}
/*******************************************************************************
** Function smp_pair_terminate
** Description This function is called to send the pairing complete callback
** and remove the connection if needed.
*******************************************************************************/
void smp_pair_terminate(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
SMP_TRACE_DEBUG0 ("smp_pair_terminate ");
if (p_data->reason == L2CAP_CONN_CANCEL)
p_cb->status = SMP_CONN_TOUT;
else
p_cb->status = SMP_PAIR_FAIL_UNKNOWN;
smp_proc_pairing_cmpl(p_cb);
}
/*******************************************************************************
** Function smp_idle_terminate
** Description This function calledin idle state to determine to send authentication
** complete or not.
*******************************************************************************/
void smp_idle_terminate(tSMP_CB *p_cb, tSMP_INT_DATA *p_data)
{
if (p_cb->flags & SMP_PAIR_FLAGS_WE_STARTED_DD)
{
SMP_TRACE_DEBUG0("Pairing terminated at IDLE state.");
p_cb->status = SMP_FAIL;
smp_proc_pairing_cmpl(p_cb);
}
}
/*******************************************************************************
**
** Function smp_link_encrypted
**
** Description This function is called when link is encrypted and notified to
** slave device. Proceed to to send LTK, DIV and ER to master if
** bonding the devices.
**
**
** Returns void
**
*******************************************************************************/
void smp_link_encrypted(BD_ADDR bda, UINT8 encr_enable)
{
tSMP_CB *p_cb = &smp_cb;
SMP_TRACE_DEBUG1 ("smp_link_encrypted encr_enable=%d",encr_enable);
if (memcmp(&smp_cb.pairing_bda[0], bda, BD_ADDR_LEN) == 0)
{
/* encryption completed with STK, remmeber the key size now, could be overwite
* when key exchange happens */
if (p_cb->loc_enc_size != 0 && encr_enable)
{
/* update the link encryption key size if a SMP pairing just performed */
btm_ble_update_sec_key_size(bda, p_cb->loc_enc_size);
}
smp_sm_event(&smp_cb, SMP_ENCRYPTED_EVT, &encr_enable);
}
}
/*******************************************************************************
**
** Function smp_proc_ltk_request
**
** Description This function is called when LTK request is received from
** controller.
**
** Returns void
**
*******************************************************************************/
BOOLEAN smp_proc_ltk_request(BD_ADDR bda)
{
SMP_TRACE_DEBUG1 ("smp_proc_ltk_request state = %d", smp_cb.state);
if ( smp_cb.state == SMP_ST_ENC_PENDING &&
!memcmp(bda, smp_cb.pairing_bda, BD_ADDR_LEN))
{
smp_sm_event(&smp_cb, SMP_ENC_REQ_EVT, NULL);
return TRUE;
}
return FALSE;
}
#endif