/
prov_node.c
1644 lines (1330 loc) · 46.6 KB
/
prov_node.c
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/* Bluetooth Mesh */
/*
* SPDX-FileCopyrightText: 2017 Intel Corporation
* SPDX-FileContributor: 2018-2021 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <errno.h>
#include <string.h>
#include "crypto.h"
#include "adv.h"
#include "mesh.h"
#include "access.h"
#include "foundation.h"
#include "mesh/common.h"
#include "mesh/proxy.h"
#include "proxy_common.h"
#include "proxy_server.h"
#include "proxy_client.h"
#include "prov_common.h"
#include "prov_node.h"
#include "mesh_v1.1/utils.h"
#if CONFIG_BLE_MESH_NODE
#if CONFIG_BLE_MESH_PB_ADV && !CONFIG_BLE_MESH_PB_GATT
NET_BUF_SIMPLE_DEFINE_STATIC(rx_buf, PROV_RX_BUF_SIZE);
#endif
static struct bt_mesh_prov_link prov_link;
#if CONFIG_BLE_MESH_PB_ADV
static void reset_adv_link(struct bt_mesh_prov_link *link, uint8_t reason);
extern uint8_t node_next_xact_id(struct bt_mesh_prov_link *link);
#endif
#if CONFIG_BLE_MESH_PB_GATT
static int prov_send_gatt(struct bt_mesh_prov_link *link, struct net_buf_simple *msg);
#endif
static void prov_send_fail_msg(uint8_t err);
struct bt_mesh_prov_link *bt_mesh_prov_node_get_link(void)
{
return &prov_link;
}
static void close_link(uint8_t reason)
{
if (bt_mesh_atomic_test_bit(prov_link.flags, PB_REMOTE)) {
if (prov_link.pb_remote_close) {
prov_link.pb_remote_close(&prov_link, reason);
}
return;
}
prov_send_fail_msg(reason);
}
void bt_mesh_prov_node_close_link(uint8_t reason)
{
close_link(reason);
}
static void reset_state(void)
{
k_delayed_work_cancel(&prov_link.prot_timer);
/* Disable Attention Timer if it was set */
if (prov_link.conf_inputs[0]) {
bt_mesh_attention(NULL, 0);
}
#if CONFIG_BLE_MESH_PB_GATT
if (prov_link.conn) {
bt_mesh_conn_unref(prov_link.conn);
}
#endif /* CONFIG_BLE_MESH_PB_GATT */
#if CONFIG_BLE_MESH_PB_ADV
/* Clear everything except the retransmit and protocol timer
* delayed work objects.
*/
(void)memset(&prov_link, 0, offsetof(struct bt_mesh_prov_link, tx.retransmit));
prov_link.pending_ack = PROV_XACT_NVAL;
prov_link.rx.prev_id = PROV_XACT_NVAL;
#if CONFIG_BLE_MESH_PB_GATT
prov_link.rx.buf = bt_mesh_proxy_server_get_buf();
#else
net_buf_simple_reset(&rx_buf);
prov_link.rx.buf = &rx_buf;
#endif /* CONFIG_BLE_MESH_PB_GATT */
prov_link.next_xact_id = node_next_xact_id;
prov_link.reset_adv_link = reset_adv_link;
prov_link.retrans_timeout = reset_adv_link;
prov_link.invite_recv = false;
#if CONFIG_BLE_MESH_FAST_PROV
prov_link.last_tx_pdu = PROV_COMPLETE;
#endif /* CONFIG_BLE_MESH_FAST_PROV */
#else /* !CONFIG_BLE_MESH_PB_ADV */
/* Clear everything except the protocol timer (k_delayed_work) */
(void)memset(&prov_link, 0, offsetof(struct bt_mesh_prov_link, prot_timer));
#endif /* CONFIG_BLE_MESH_PB_ADV */
#if CONFIG_BLE_MESH_PB_GATT
prov_link.pb_gatt_send = prov_send_gatt;
#endif /* CONFIG_BLE_MESH_PB_GATT */
}
#if CONFIG_BLE_MESH_PB_ADV
static void reset_adv_link(struct bt_mesh_prov_link *link, uint8_t reason)
{
ARG_UNUSED(link);
bt_mesh_prov_clear_tx(&prov_link, true);
if (bt_mesh_prov_get()->link_close) {
bt_mesh_prov_get()->link_close(BLE_MESH_PROV_ADV, reason);
}
#if CONFIG_BLE_MESH_USE_DUPLICATE_SCAN
/* Remove the link id from exceptional list */
bt_mesh_update_exceptional_list(BLE_MESH_EXCEP_LIST_SUB_CODE_REMOVE,
BLE_MESH_EXCEP_LIST_TYPE_MESH_LINK_ID,
&prov_link.link_id);
#endif
reset_state();
}
#endif /* CONFIG_BLE_MESH_PB_ADV */
#if CONFIG_BLE_MESH_PB_GATT
static int prov_send_gatt(struct bt_mesh_prov_link *link, struct net_buf_simple *msg)
{
int err = 0;
ARG_UNUSED(link);
if (!prov_link.conn) {
BT_ERR("PB-GATT send, not connected");
return -ENOTCONN;
}
/* Changed by Espressif, add provisioning timeout timer operations.
* When sending a provisioning PDU successfully, restart the 60s timer.
*/
#if CONFIG_BLE_MESH_GATT_PROXY_CLIENT && CONFIG_BLE_MESH_RPR_SRV
if (bt_mesh_atomic_test_bit(link->flags, PB_REMOTE)) {
err = bt_mesh_proxy_client_send(link->conn, BLE_MESH_PROXY_PROV, msg);
/* TODO: do we need to check the err here? */
bt_mesh_rpr_srv_send_outbound_report(link->pb_remote_uuid, true);
} else
#endif
{
err = bt_mesh_proxy_server_send(prov_link.conn, BLE_MESH_PROXY_PROV, msg);
}
if (err) {
BT_ERR("Failed to send provisioning PDU");
return err;
}
k_delayed_work_submit(&prov_link.prot_timer, PROTOCOL_TIMEOUT);
return 0;
}
#endif /* CONFIG_BLE_MESH_PB_GATT */
static void prov_send_fail_msg(uint8_t err)
{
PROV_BUF(buf, 2);
bt_mesh_prov_buf_init(&buf, PROV_FAILED);
net_buf_simple_add_u8(&buf, err);
if (bt_mesh_prov_send(&prov_link, &buf)) {
BT_ERR("Failed to send Provisioning Failed message");
}
bt_mesh_atomic_set_bit(prov_link.flags, LINK_INVALID);
}
static void prov_invite(const uint8_t *data)
{
PROV_BUF(buf, 12);
BT_DBG("Attention Duration: %u seconds", data[0]);
if (data[0]) {
bt_mesh_attention(NULL, data[0]);
}
#if CONFIG_BLE_MESH_CERT_BASED_PROV
/* Indicate prov_invite is received */
prov_link.invite_recv = true;
#endif
prov_link.conf_inputs[0] = data[0];
bt_mesh_prov_buf_init(&buf, PROV_CAPABILITIES);
/* Number of Elements supported */
net_buf_simple_add_u8(&buf, bt_mesh_elem_count());
/* NOTE: If bit 1 of the OOB Type field is set to 1, bit 0 of
* the Algorithms field shall be set to 0.
*/
/* Supported algorithms - FIPS P-256 Elliptic Curve */
#if CONFIG_BLE_MESH_PROV_EPA
if (bt_mesh_prov_get()->oob_type & BIT(PROV_ONLY_OOB_AUTH_SUPPORT)) {
net_buf_simple_add_be16(&buf, BIT(PROV_ALG_P256_HMAC_SHA256));
} else {
net_buf_simple_add_be16(&buf, (BIT(PROV_ALG_P256_CMAC_AES128) |
BIT(PROV_ALG_P256_HMAC_SHA256)));
}
#else
net_buf_simple_add_be16(&buf, BIT(PROV_ALG_P256_CMAC_AES128));
#endif
/* Public Key Type */
net_buf_simple_add_u8(&buf, bt_mesh_prov_get()->oob_pub_key);
/* OOB Type */
net_buf_simple_add_u8(&buf, bt_mesh_prov_get()->oob_type);
/* Output OOB Size */
net_buf_simple_add_u8(&buf, bt_mesh_prov_get()->output_size);
/* Output OOB Action */
net_buf_simple_add_be16(&buf, bt_mesh_prov_get()->output_actions);
/* Input OOB Size */
net_buf_simple_add_u8(&buf, bt_mesh_prov_get()->input_size);
/* Input OOB Action */
net_buf_simple_add_be16(&buf, bt_mesh_prov_get()->input_actions);
memcpy(&prov_link.conf_inputs[1], &buf.data[1], 11);
if (bt_mesh_prov_send(&prov_link, &buf)) {
BT_ERR("Failed to send capabilities");
return;
}
prov_link.expect = PROV_START;
}
static void prov_capabilities(const uint8_t *data)
{}
static int prov_auth(uint8_t method, uint8_t action, uint8_t size)
{
bt_mesh_output_action_t output = 0U;
bt_mesh_input_action_t input = 0U;
uint8_t auth_size = 0;
auth_size = PROV_AUTH_SIZE(&prov_link);
switch (method) {
case AUTH_METHOD_NO_OOB:
if (action || size) {
return -EINVAL;
}
(void)memset(prov_link.auth, 0, sizeof(prov_link.auth));
return 0;
case AUTH_METHOD_STATIC:
if (action || size) {
return -EINVAL;
}
if (bt_mesh_prov_get()->static_val_len > auth_size) {
memcpy(prov_link.auth, bt_mesh_prov_get()->static_val, auth_size);
} else {
memcpy(prov_link.auth + auth_size - bt_mesh_prov_get()->static_val_len,
bt_mesh_prov_get()->static_val, bt_mesh_prov_get()->static_val_len);
(void)memset(prov_link.auth, 0,
auth_size - bt_mesh_prov_get()->static_val_len);
}
return 0;
case AUTH_METHOD_OUTPUT:
output = bt_mesh_prov_output_action(action);
if (!output) {
return -EINVAL;
}
if (!(bt_mesh_prov_get()->output_actions & output)) {
return -EINVAL;
}
if (size > bt_mesh_prov_get()->output_size) {
return -EINVAL;
}
if (output == BLE_MESH_DISPLAY_STRING) {
unsigned char str[9] = {'\0'};
uint8_t i = 0U;
bt_mesh_rand(str, size);
/* Normalize to '0' .. '9' & 'A' .. 'Z' */
for (i = 0U; i < size; i++) {
str[i] %= 36;
if (str[i] < 10) {
str[i] += '0';
} else {
str[i] += 'A' - 10;
}
}
str[size] = '\0';
memcpy(prov_link.auth, str, size);
(void)memset(prov_link.auth + size, 0,
sizeof(prov_link.auth) - size);
return bt_mesh_prov_get()->output_string((char *)str);
} else {
uint32_t div[8] = { 10, 100, 1000, 10000, 100000,
1000000, 10000000, 100000000
};
uint32_t num = 0U;
bt_mesh_rand(&num, sizeof(num));
if (output == BLE_MESH_BLINK ||
output == BLE_MESH_BEEP ||
output == BLE_MESH_VIBRATE) {
/** NOTE: According to the Bluetooth Mesh Profile Specification
* Section 5.4.2.4, blink, beep and vibrate should be a random
* integer between 0 and 10^size.
*/
num = (num % (div[size - 1] - 1)) + 1;
} else {
num %= div[size - 1];
}
sys_put_be32(num, &prov_link.auth[auth_size - 4]);
(void)memset(prov_link.auth, 0, auth_size - 4);
return bt_mesh_prov_get()->output_number(output, num);
}
case AUTH_METHOD_INPUT:
input = bt_mesh_prov_input_action(action);
if (!input) {
return -EINVAL;
}
if (!(bt_mesh_prov_get()->input_actions & input)) {
return -EINVAL;
}
if (size > bt_mesh_prov_get()->input_size) {
return -EINVAL;
}
if (input == BLE_MESH_ENTER_STRING) {
bt_mesh_atomic_set_bit(prov_link.flags, WAIT_STRING);
} else {
bt_mesh_atomic_set_bit(prov_link.flags, WAIT_NUMBER);
}
return bt_mesh_prov_get()->input(input, size);
default:
return -EINVAL;
}
}
static void prov_start(const uint8_t *data)
{
BT_INFO("Algorithm: 0x%02x", data[0]);
BT_INFO("Public Key: 0x%02x", data[1]);
BT_INFO("Auth Method: 0x%02x", data[2]);
BT_INFO("Auth Action: 0x%02x", data[3]);
BT_INFO("Auth Size: 0x%02x", data[4]);
prov_link.algorithm = data[0];
if (data[0] >= PROV_ALG_METHOD_MAX_NUM) {
BT_ERR("Unknown algorithm 0x%02x", data[0]);
close_link(PROV_ERR_NVAL_FMT);
return;
}
/* If bit 1 of the OOB Type field of the Provisioning Capabilities PDU
* is set to 1 (Only OOB authenticated provisioning supported) and any
* of the following conditions is met:
* 1. the Algorithm field of the Provisioning Start PDU is not set to
* BTM_ECDH_P256_CMAC_AES128_AES_CCM and the Provisioning Start PDU
* has the Authentication Method field set to 0x00 (Authentication
* with No OOB).
* 2. the Algorithm field is set to BTM_ECDH_P256_CMAC_AES128_AES_CCM.
* the provisioning protocol shall fail and the message shall be treated
* by the Provisionee as an error in the provisioning protocol.
*/
#if CONFIG_BLE_MESH_PROV_EPA
if ((bt_mesh_prov_get()->oob_type & BIT(PROV_ONLY_OOB_AUTH_SUPPORT)) &&
((data[0] == PROV_ALG_P256_HMAC_SHA256 && data[2] == AUTH_METHOD_NO_OOB) ||
data[0] == PROV_ALG_P256_CMAC_AES128)) {
close_link(PROV_ERR_NVAL_FMT);
return;
}
#endif
if (data[1] != bt_mesh_prov_get()->oob_pub_key) {
BT_ERR("Invalid public key type: 0x%02x", data[1]);
close_link(PROV_ERR_NVAL_FMT);
return;
}
prov_link.public_key = data[1];
memcpy(&prov_link.conf_inputs[12], data, 5);
prov_link.expect = PROV_PUB_KEY;
/* If Provisioning Start PDU indicates that provisioner chooses
* OOB public key, then callback to the application layer to let
* users input public & private key pair.
*/
if (prov_link.public_key == PROV_OOB_PUB_KEY) {
bt_mesh_prov_get()->oob_pub_key_cb();
}
if (prov_auth(data[2], data[3], data[4])) {
BT_ERR("Invalid authentication method: 0x%02x; "
"action: 0x%02x; size: 0x%02x",
data[2], data[3], data[4]);
close_link(PROV_ERR_NVAL_FMT);
}
}
static void send_confirm(void)
{
uint8_t *local_conf = NULL;
uint8_t conf_val_size = 0;
uint8_t rand_val_size = 0;
uint8_t conf_salt_size = 0;
uint8_t conf_key_size = 0;
conf_val_size = PROV_CONF_SIZE(&prov_link);
rand_val_size = PROV_RAND_SIZE(&prov_link);
conf_salt_size = PROV_CONF_SALT_SIZE(&prov_link);
conf_key_size = PROV_CONF_KEY_SIZE(&prov_link);
ARG_UNUSED(conf_salt_size);
ARG_UNUSED(conf_key_size);
PROV_BUF(cfm, (conf_val_size + 1));
BT_DBG("ConfInputs[0] %s", bt_hex(prov_link.conf_inputs, 64));
BT_DBG("ConfInputs[64] %s", bt_hex(&prov_link.conf_inputs[64], 64));
BT_DBG("ConfInputs[128] %s", bt_hex(&prov_link.conf_inputs[128], 17));
if (prov_link.algorithm == PROV_ALG_P256_CMAC_AES128) {
if (bt_mesh_prov_conf_salt(prov_link.conf_inputs, prov_link.conf_salt)) {
BT_ERR("Unable to generate confirmation salt");
close_link(PROV_ERR_UNEXP_ERR);
return;
}
if (bt_mesh_prov_conf_key(prov_link.dhkey, prov_link.conf_salt,
prov_link.conf_key)) {
BT_ERR("Unable to generate confirmation key");
close_link(PROV_ERR_UNEXP_ERR);
return;
}
}
#if CONFIG_BLE_MESH_PROV_EPA
else {
if (bt_mesh_prov_conf_salt_epa(prov_link.conf_inputs, prov_link.conf_salt)) {
BT_ERR("Unable to generate confirmation salt(epa)");
close_link(PROV_ERR_UNEXP_ERR);
return;
}
if (bt_mesh_prov_conf_key_epa(prov_link.dhkey, prov_link.auth,
prov_link.conf_salt, prov_link.conf_key)) {
BT_ERR("Unable to generate confirmation key(epa)");
close_link(PROV_ERR_UNEXP_ERR);
return;
}
}
#endif
if (bt_mesh_rand(prov_link.rand, rand_val_size)) {
BT_ERR("Unable to generate random number");
close_link(PROV_ERR_UNEXP_ERR);
return;
}
BT_DBG("ConfirmationSalt: %s", bt_hex(prov_link.conf_salt, conf_salt_size));
BT_DBG("ConfirmationKey: %s", bt_hex(prov_link.conf_key, conf_key_size));
BT_DBG("LocalRandom: %s", bt_hex(prov_link.rand, rand_val_size));
bt_mesh_prov_buf_init(&cfm, PROV_CONFIRM);
local_conf = net_buf_simple_add(&cfm, conf_val_size);
if (prov_link.algorithm == PROV_ALG_P256_CMAC_AES128) {
if (bt_mesh_prov_conf(prov_link.conf_key, prov_link.rand,
prov_link.auth, local_conf)) {
BT_ERR("Unable to generate confirmation value");
close_link(PROV_ERR_UNEXP_ERR);
return;
}
}
#if CONFIG_BLE_MESH_PROV_EPA
else {
if (bt_mesh_prov_conf_epa(prov_link.conf_key, prov_link.rand,
local_conf)) {
BT_ERR("Unable to generate confirmation value(epa)");
close_link(PROV_ERR_UNEXP_ERR);
return;
}
}
#endif
if (!memcmp(prov_link.conf, local_conf, conf_val_size)) {
BT_ERR("Confirmation value is identical to ours, rejecting.");
prov_send_fail_msg(PROV_ERR_NVAL_FMT);
return;
}
if (bt_mesh_prov_send(&prov_link, &cfm)) {
BT_ERR("Unable to send Provisioning Confirm");
return;
}
prov_link.expect = PROV_RANDOM;
}
static void send_input_complete(void)
{
PROV_BUF(buf, 1);
bt_mesh_prov_buf_init(&buf, PROV_INPUT_COMPLETE);
if (bt_mesh_prov_send(&prov_link, &buf)) {
BT_ERR("Failed to send Provisioning Input Complete");
}
}
int bt_mesh_input_number(uint32_t num)
{
uint8_t auth_size = 0;
auth_size = PROV_AUTH_SIZE(&prov_link);
BT_INFO("%u", num);
if (!bt_mesh_atomic_test_and_clear_bit(prov_link.flags, WAIT_NUMBER)) {
return -EINVAL;
}
sys_put_be32(num, &prov_link.auth[auth_size - 4]);
send_input_complete();
if (!bt_mesh_atomic_test_bit(prov_link.flags, HAVE_DHKEY)) {
return 0;
}
if (bt_mesh_atomic_test_and_clear_bit(prov_link.flags, SEND_CONFIRM)) {
send_confirm();
}
return 0;
}
int bt_mesh_input_string(const char *str)
{
BT_INFO("%s", str);
if (!bt_mesh_atomic_test_and_clear_bit(prov_link.flags, WAIT_STRING)) {
return -EINVAL;
}
(void)memcpy(prov_link.auth, str, bt_mesh_prov_get()->input_size);
send_input_complete();
if (!bt_mesh_atomic_test_bit(prov_link.flags, HAVE_DHKEY)) {
return 0;
}
if (bt_mesh_atomic_test_and_clear_bit(prov_link.flags, SEND_CONFIRM)) {
send_confirm();
}
return 0;
}
static void send_pub_key(void)
{
const uint8_t *key = NULL;
uint8_t dhkey[32] = {0};
PROV_BUF(buf, 65);
/* Copy remote key in little-endian for generating DHKey.
* X and Y halves are swapped independently. Use response
* buffer as a temporary storage location. The validating
* of the remote public key is finished when it is received.
*/
sys_memcpy_swap(buf.data, &prov_link.conf_inputs[17], 32);
sys_memcpy_swap(&buf.data[32], &prov_link.conf_inputs[49], 32);
if (bt_mesh_dh_key_gen(buf.data, dhkey)) {
BT_ERR("Unable to generate DHKey");
close_link(PROV_ERR_UNEXP_ERR);
return;
}
sys_memcpy_swap(prov_link.dhkey, dhkey, 32);
BT_DBG("DHkey: %s", bt_hex(prov_link.dhkey, 32));
bt_mesh_atomic_set_bit(prov_link.flags, HAVE_DHKEY);
key = bt_mesh_pub_key_get();
if (!key) {
BT_ERR("No public key available");
close_link(PROV_ERR_UNEXP_ERR);
return;
}
BT_DBG("Local Public Key: %s", bt_hex(key, 64));
bt_mesh_prov_buf_init(&buf, PROV_PUB_KEY);
/* Swap X and Y halves independently to big-endian */
sys_memcpy_swap(net_buf_simple_add(&buf, 32), key, 32);
sys_memcpy_swap(net_buf_simple_add(&buf, 32), &key[32], 32);
memcpy(&prov_link.conf_inputs[81], &buf.data[1], 64);
if (bt_mesh_prov_send(&prov_link, &buf)) {
BT_ERR("Failed to send Public Key");
return;
}
prov_link.expect = PROV_CONFIRM;
}
static int bt_mesh_calc_dh_key(void)
{
uint8_t pub_key[64] = {0};
uint8_t dhkey[32] = {0};
/* Copy remote key in little-endian for generating DHKey.
* X and Y halves are swapped independently.
*/
sys_memcpy_swap(&pub_key[0], &prov_link.conf_inputs[17], 32);
sys_memcpy_swap(&pub_key[32], &prov_link.conf_inputs[49], 32);
if (bt_mesh_dh_key_gen(pub_key, dhkey)) {
BT_ERR("Unable to generate DHKey");
close_link(PROV_ERR_UNEXP_ERR);
return -EIO;
}
sys_memcpy_swap(prov_link.dhkey, dhkey, 32);
BT_DBG("DHkey: %s", bt_hex(prov_link.dhkey, 32));
bt_mesh_atomic_set_bit(prov_link.flags, HAVE_DHKEY);
if (bt_mesh_atomic_test_bit(prov_link.flags, WAIT_NUMBER) ||
bt_mesh_atomic_test_bit(prov_link.flags, WAIT_STRING)) {
return 0;
}
if (bt_mesh_atomic_test_and_clear_bit(prov_link.flags, SEND_CONFIRM)) {
send_confirm();
}
return 0;
}
int bt_mesh_set_oob_pub_key(const uint8_t pub_key_x[32],
const uint8_t pub_key_y[32],
const uint8_t pri_key[32])
{
if (!pub_key_x || !pub_key_y || !pri_key) {
BT_ERR("%s, Invalid parameter", __func__);
return -EINVAL;
}
/* Copy OOB public key in big-endian to Provisioning ConfirmationInputs,
* X and Y halves are swapped independently.
* And set input private key to mesh_bearer_adapt.c
*/
sys_memcpy_swap(&prov_link.conf_inputs[81], pub_key_x, 32);
sys_memcpy_swap(&prov_link.conf_inputs[81] + 32, pub_key_y, 32);
bt_mesh_set_private_key(pri_key);
bt_mesh_atomic_set_bit(prov_link.flags, OOB_PUB_KEY);
/* If remote public key is not got, just return */
if (!bt_mesh_atomic_test_bit(prov_link.flags, REMOTE_PUB_KEY)) {
return 0;
}
return bt_mesh_calc_dh_key();
}
static void prov_pub_key(const uint8_t *data)
{
BT_DBG("Remote Public Key: %s", bt_hex(data, 64));
/* BLE Mesh BQB test case MESH/NODE/PROV/UPD/BI-13-C needs to
* check the public key using the following rules:
* (1) X > 0, Y > 0
* (2) X > 0, Y = 0
* (3) X = 0, Y = 0
*/
if (!bt_mesh_check_public_key(data)) {
BT_ERR("Invalid public key");
close_link(PROV_ERR_UNEXP_PDU);
return;
}
memcpy(&prov_link.conf_inputs[17], data, 64);
bt_mesh_atomic_set_bit(prov_link.flags, REMOTE_PUB_KEY);
if (prov_link.public_key == PROV_NO_OOB_PUB_KEY) {
send_pub_key();
} else {
prov_link.expect = PROV_CONFIRM;
}
}
static void prov_input_complete(const uint8_t *data)
{}
static void prov_confirm(const uint8_t *data)
{
uint8_t conf_val_size = 0;
conf_val_size = PROV_CONF_SIZE(&prov_link);
BT_DBG("Remote Confirm: %s", bt_hex(data, conf_val_size));
memcpy(prov_link.conf, data, conf_val_size);
if (!bt_mesh_atomic_test_bit(prov_link.flags, HAVE_DHKEY)) {
#if CONFIG_BLE_MESH_PB_ADV
bt_mesh_prov_clear_tx(&prov_link, true);
#endif
bt_mesh_atomic_set_bit(prov_link.flags, SEND_CONFIRM);
/* If using OOB public key and it has already got, calculates dhkey */
if (prov_link.public_key == PROV_OOB_PUB_KEY &&
bt_mesh_atomic_test_bit(prov_link.flags, OOB_PUB_KEY)) {
bt_mesh_calc_dh_key();
}
} else {
send_confirm();
}
}
static void prov_random(const uint8_t *data)
{
uint8_t conf_verify[32] = {0};
uint8_t rand_val_size = 0;
uint8_t conf_val_size = 0;
rand_val_size = PROV_RAND_SIZE(&prov_link);
conf_val_size = PROV_CONF_SIZE(&prov_link);
PROV_BUF(rnd, rand_val_size);
BT_INFO("Remote Random: %s", bt_hex(data, rand_val_size));
if (prov_link.algorithm == PROV_ALG_P256_CMAC_AES128) {
if (bt_mesh_prov_conf(prov_link.conf_key, data, prov_link.auth, conf_verify)) {
BT_ERR("Unable to calculate confirmation verification");
close_link(PROV_ERR_UNEXP_ERR);
return;
}
}
#if CONFIG_BLE_MESH_PROV_EPA
else {
if (bt_mesh_prov_conf_epa(prov_link.conf_key, data, conf_verify)) {
BT_ERR("Unable to calculate confirmation verification");
close_link(PROV_ERR_UNEXP_ERR);
return;
}
}
#endif
if (memcmp(conf_verify, prov_link.conf, conf_val_size)) {
BT_ERR("Invalid confirmation value");
BT_ERR("Received: %s", bt_hex(prov_link.conf, conf_val_size));
BT_ERR("Calculated: %s", bt_hex(conf_verify, conf_val_size));
close_link(PROV_ERR_CFM_FAILED);
return;
}
bt_mesh_prov_buf_init(&rnd, PROV_RANDOM);
net_buf_simple_add_mem(&rnd, prov_link.rand, rand_val_size);
if (bt_mesh_prov_send(&prov_link, &rnd)) {
BT_ERR("Failed to send Provisioning Random");
return;
}
if (prov_link.algorithm == PROV_ALG_P256_CMAC_AES128) {
if (bt_mesh_prov_salt(prov_link.conf_salt, data, prov_link.rand,
prov_link.prov_salt)) {
BT_ERR("Failed to generate provisioning salt");
close_link(PROV_ERR_UNEXP_ERR);
return;
}
}
#if CONFIG_BLE_MESH_PROV_EPA
else {
if (bt_mesh_prov_salt_epa(prov_link.conf_salt, data, prov_link.rand,
prov_link.prov_salt)) {
BT_ERR("Failed to generate provisioning salt");
close_link(PROV_ERR_UNEXP_ERR);
return;
}
}
#endif
BT_DBG("ProvisioningSalt: %s", bt_hex(prov_link.prov_salt, 16));
prov_link.expect = PROV_DATA;
}
static inline bool is_pb_gatt(void)
{
#if CONFIG_BLE_MESH_PB_GATT
return !!prov_link.conn;
#else
return false;
#endif
}
static void prov_data(const uint8_t *data)
{
uint8_t session_key[16] = {0};
bool identity_enable = false;
uint8_t dev_key[16] = {0};
uint8_t nonce[13] = {0};
uint32_t iv_index = 0U;
uint16_t net_idx = 0U;
uint8_t pdu[25] = {0};
uint16_t addr = 0U;
uint8_t flags = 0U;
PROV_BUF(msg, 1);
int err = 0;
err = bt_mesh_session_key(prov_link.dhkey, prov_link.prov_salt, session_key);
if (err) {
BT_ERR("Unable to generate session key");
close_link(PROV_ERR_UNEXP_ERR);
return;
}
BT_DBG("SessionKey: %s", bt_hex(session_key, 16));
err = bt_mesh_prov_nonce(prov_link.dhkey, prov_link.prov_salt, nonce);
if (err) {
BT_ERR("Unable to generate session nonce");
close_link(PROV_ERR_UNEXP_ERR);
return;
}
BT_DBG("Nonce: %s", bt_hex(nonce, 13));
err = bt_mesh_prov_decrypt(session_key, nonce, data, pdu);
if (err) {
BT_ERR("Unable to decrypt provisioning data");
close_link(PROV_ERR_DECRYPT);
return;
}
net_idx = sys_get_be16(&pdu[16]);
flags = pdu[18];
iv_index = sys_get_be32(&pdu[19]);
addr = sys_get_be16(&pdu[23]);
BT_DBG("net_idx %u iv_index 0x%08x, addr 0x%04x",
net_idx, iv_index, addr);
#if CONFIG_BLE_MESH_RPR_SRV
if (bt_mesh_atomic_test_bit(prov_link.flags, PB_NPPI)) {
uint8_t reason = 0;
if (bt_mesh_rpr_srv_nppi_check(prov_link.pb_remote_nppi, pdu, net_idx,
iv_index, addr, &reason) == false) {
close_link(reason);
return;
}
}
#endif /* CONFIG_BLE_MESH_RPR_SRV */
err = bt_mesh_dev_key(prov_link.dhkey, prov_link.prov_salt, dev_key);
if (err) {
BT_ERR("Unable to generate device key");
close_link(PROV_ERR_UNEXP_ERR);
return;
}
BT_DBG("DevKey: %s", bt_hex(dev_key, 16));
#if CONFIG_BLE_MESH_RPR_SRV
/* Store NPPI data */
if (bt_mesh_atomic_test_bit(prov_link.flags, PB_NPPI)) {
err = bt_mesh_rpr_srv_store_nppi_data(prov_link.pb_remote_uuid,
pdu, net_idx, flags,
iv_index, addr, dev_key);
if (err) {
close_link(PROV_ERR_UNEXP_ERR);
return;
}
}
#endif /* CONFIG_BLE_MESH_RPR_SRV */
bt_mesh_prov_buf_init(&msg, PROV_COMPLETE);
if (bt_mesh_prov_send(&prov_link, &msg)) {
BT_ERR("Failed to send Provisioning Complete");
return;
}
/* Ignore any further PDUs on this link */
prov_link.expect = 0U;
#if CONFIG_BLE_MESH_RPR_SRV
/* For NPPI, no need to perform the following actions */
if (bt_mesh_atomic_test_bit(prov_link.flags, PB_NPPI)) {
return;
}
#endif /* CONFIG_BLE_MESH_RPR_SRV */
/* Store info, since bt_mesh_provision() will end up clearing it */
if (IS_ENABLED(CONFIG_BLE_MESH_GATT_PROXY_SERVER)) {
identity_enable = is_pb_gatt();
} else {
identity_enable = false;
}
err = bt_mesh_provision(pdu, net_idx, flags, iv_index, addr, dev_key);
if (err) {
BT_ERR("Failed to provision (err %d)", err);
return;
}
/* After PB-GATT provisioning we should start advertising
* using Node Identity.
*/
if (IS_ENABLED(CONFIG_BLE_MESH_GATT_PROXY_SERVER) && identity_enable) {
bt_mesh_proxy_identity_enable();
}
}
static void prov_complete(const uint8_t *data)
{}
static void prov_failed(const uint8_t *data)
{
BT_WARN("Error: 0x%02x", data[0]);
#if CONFIG_BLE_MESH_RPR_SRV
if (bt_mesh_atomic_test_bit(prov_link.flags, PB_REMOTE)) {
prov_link.pb_remote_cbd = true;
/* In this case, no need to send Link Close */
prov_link.pb_remote_reset = true;
close_link(data[0]);
return;
}
#endif /* CONFIG_BLE_MESH_RPR_SRV */
}
static const struct {
void (*func)(const uint8_t *data);
bool pb_remote; /* Indicate if the PDU could be received when PB-Remote is used */
} prov_handlers[] = {
{ prov_invite, false },
{ prov_capabilities, true },
{ prov_start, false },
{ prov_pub_key, true },
{ prov_input_complete, true },
{ prov_confirm, true },
{ prov_random, true },
{ prov_data, false },
{ prov_complete, true },
{ prov_failed, true },