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Merge branch 'bugfix/ble_mesh_prov_use_diff_rand_v4.2' into 'release/v4.2'

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ble_mesh: stack: Use different random for each provisioning (v4.2)

See merge request espressif/esp-idf!12077
This commit is contained in:
Island 2021-01-21 11:07:02 +08:00
commit 54d8a1f76b
1 changed files with 11 additions and 20 deletions
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27
components/bt/esp_ble_mesh/mesh_core/provisioner_prov.c
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@ -100,6 +100,7 @@ _Static_assert(BLE_MESH_MAX_CONN >= CONFIG_BLE_MESH_PBG_SAME_TIME,
#define PROV_CONF_KEY_SIZE 0x10
#define PROV_DH_KEY_SIZE 0x20
#define PROV_CONFIRM_SIZE 0x10
#define PROV_RANDOM_SIZE 0x10
#define PROV_PROV_SALT_SIZE 0x10
#define PROV_CONF_INPUTS_SIZE 0x91
@ -219,12 +220,6 @@ struct bt_mesh_prov_ctx {
/* Provisioning bearers used by Provisioner */
bt_mesh_prov_bearer_t bearers;
/* If provisioning random have been generated, set BIT0 to 1 */
uint8_t rand_gen_done;
/* Provisioner random */
uint8_t random[16];
/* Current number of PB-ADV provisioned devices simultaneously */
uint8_t pba_count;
@ -1256,6 +1251,7 @@ static void prov_memory_free(const uint8_t idx)
{
PROV_FREE_MEM(idx, dhkey);
PROV_FREE_MEM(idx, auth);
PROV_FREE_MEM(idx, rand);
PROV_FREE_MEM(idx, conf);
PROV_FREE_MEM(idx, conf_salt);
PROV_FREE_MEM(idx, conf_key);
@ -2005,20 +2001,15 @@ static void send_confirm(const uint8_t idx)
BT_DBG("ConfirmationKey: %s", bt_hex(link[idx].conf_key, 16));
/** Provisioner use the same random number for each provisioning
* device, if different random need to be used, here provisioner
* should allocate memory for rand and call bt_mesh_rand() every time.
*/
if (!(prov_ctx.rand_gen_done & BIT(0))) {
if (bt_mesh_rand(prov_ctx.random, 16)) {
BT_ERR("Failed to generate random number");
link[idx].rand = bt_mesh_calloc(PROV_RANDOM_SIZE);
if (!link[idx].rand) {
BT_ERR("%s, Out of memory", __func__);
goto fail;
}
link[idx].rand = prov_ctx.random;
prov_ctx.rand_gen_done |= BIT(0);
} else {
/* Provisioner random has already been generated. */
link[idx].rand = prov_ctx.random;
if (bt_mesh_rand(link[idx].rand, PROV_RANDOM_SIZE)) {
BT_ERR("Failed to generate random number");
goto fail;
}
BT_DBG("LocalRandom: %s", bt_hex(link[idx].rand, 16));