246 lines
8.8 KiB
C
246 lines
8.8 KiB
C
/**
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* Copyright (c) 2016 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "es_gatts_read.h"
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#include "es_adv.h"
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#include "es_gatts.h"
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#include "es_security.h"
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#include "es_slot.h"
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static ret_code_t send_read_reply(nrf_ble_escs_t * p_escs, ble_gatts_rw_authorize_reply_params_t * p_reply)
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{
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VERIFY_PARAM_NOT_NULL(p_escs);
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VERIFY_PARAM_NOT_NULL(p_reply);
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p_reply->type = BLE_GATTS_AUTHORIZE_TYPE_READ;
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p_reply->params.read.update = 1;
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p_reply->params.read.offset = 0;
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return es_gatts_send_reply(p_escs, p_reply);
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}
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static ret_code_t read_value(nrf_ble_escs_t * p_escs, uint8_t length, const void * p_value)
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{
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VERIFY_PARAM_NOT_NULL(p_escs);
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VERIFY_PARAM_NOT_NULL(p_value);
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ble_gatts_rw_authorize_reply_params_t reply = {0};
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reply.params.read.len = length;
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reply.params.read.p_data = p_value;
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reply.params.read.gatt_status = BLE_GATT_STATUS_SUCCESS;
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return send_read_reply(p_escs, &reply);
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}
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static ret_code_t read_from_gattdb(nrf_ble_escs_t * p_escs, uint16_t val_handle)
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{
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VERIFY_PARAM_NOT_NULL(p_escs);
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ret_code_t err_code;
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// Go straight to the characteristic
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uint8_t value_buffer[ESCS_ADV_SLOT_CHAR_LENGTH_MAX] = {0};
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ble_gatts_value_t value = {.len = sizeof(value_buffer),
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.offset = 0,
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.p_value = &(value_buffer[0])};
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err_code = sd_ble_gatts_value_get(p_escs->conn_handle, val_handle, &value);
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RETURN_IF_ERROR(err_code);
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return read_value(p_escs, value.len, value.p_value);
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}
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static ret_code_t read_adv_slot(nrf_ble_escs_t * p_escs, uint8_t active_slot, const es_slot_reg_t * p_reg)
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{
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VERIFY_PARAM_NOT_NULL(p_escs);
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ble_gatts_rw_authorize_reply_params_t reply = {0};
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uint8_t eid_buf[14];
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// If an EID slot is read, load scaler, clock value and ephemeral ID.
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if (p_reg->slots[active_slot].adv_frame.type == ES_FRAME_TYPE_EID)
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{
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/*lint -save -e666 */
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uint32_t clock_value = es_security_clock_get(active_slot);
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clock_value = BYTES_REVERSE_32BIT(clock_value);
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/*lint -restore */
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reply.params.read.len = ES_EID_GATTS_READ_LENGTH;
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// Fill EID buffer with data
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eid_buf[ES_EID_GATTS_READ_FRAME_TYPE_IDX] = ES_FRAME_TYPE_EID;
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eid_buf[ES_EID_GATTS_READ_EXPONENT_IDX] = es_security_scaler_get(active_slot);
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memcpy(&eid_buf[ES_EID_GATTS_READ_CLCK_VALUE_IDX], &clock_value, sizeof(clock_value));
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/*lint -save -e545 */
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memcpy(&eid_buf[ES_EID_GATTS_READ_EID_IDX],
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&p_reg->slots[active_slot].adv_frame.frame.eid.eid,
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ES_EID_ID_LENGTH);
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/*lint -restore */
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reply.params.read.p_data = eid_buf;
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}
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// Otherwise, simply load the contents of the frame.
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else
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{
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// Check if slot being read is an eTLM slot.
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if ((p_reg->num_configured_eid_slots > 0) && p_reg->tlm_configured && (p_reg->tlm_slot == active_slot))
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{
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// Fill eTLM slot using EID key from first EID slot.
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es_slot_etlm_update(p_reg->eid_slots_configured[0]);
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}
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reply.params.read.len = p_reg->slots[active_slot].adv_frame.length;
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reply.params.read.p_data = (uint8_t *)&p_reg->slots[active_slot].adv_frame.frame;
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}
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reply.params.read.gatt_status = BLE_GATT_STATUS_SUCCESS;
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return send_read_reply(p_escs, &reply);
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}
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ret_code_t es_gatts_read_handle_locked_read(nrf_ble_escs_t * p_escs, uint16_t uuid)
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{
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VERIFY_PARAM_NOT_NULL(p_escs);
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if (uuid == BLE_UUID_ESCS_REMAIN_CONNECTABLE_CHAR)
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{
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uint8_t retval = APP_IS_REMAIN_CONNECTABLE_SUPPORTED;
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return read_value(p_escs, sizeof(retval), &retval);
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}
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else if (uuid == BLE_UUID_ESCS_LOCK_STATE_CHAR)
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{
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return read_value(p_escs, ESCS_LOCK_STATE_READ_LENGTH, &p_escs->lock_state);
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}
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else
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{
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return es_gatts_send_op_not_permitted(p_escs, true);
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}
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}
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ret_code_t es_gatts_read_handle_unlock(nrf_ble_escs_t * p_escs)
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{
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VERIFY_PARAM_NOT_NULL(p_escs);
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ret_code_t err_code;
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uint8_t key_buff[ESCS_AES_KEY_SIZE];
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err_code = es_security_random_challenge_generate(key_buff);
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RETURN_IF_ERROR(err_code);
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es_security_unlock_prepare(key_buff);
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return read_value(p_escs, ESCS_AES_KEY_SIZE, key_buff);
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}
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ret_code_t es_gatts_read_handle_unlocked_read(nrf_ble_escs_t * p_escs,
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uint16_t uuid,
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uint16_t val_handle,
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uint8_t active_slot)
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{
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VERIFY_PARAM_NOT_NULL(p_escs);
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const es_slot_reg_t * p_reg = es_slot_get_registry();
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switch (uuid)
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{
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case BLE_UUID_ESCS_BROADCAST_CAP_CHAR:
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case BLE_UUID_ESCS_UNLOCK_CHAR:
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case BLE_UUID_ESCS_PUBLIC_ECDH_KEY_CHAR:
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case BLE_UUID_ESCS_ACTIVE_SLOT_CHAR:
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return read_from_gattdb(p_escs, val_handle);
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case BLE_UUID_ESCS_LOCK_STATE_CHAR:
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return read_value(p_escs, ESCS_LOCK_STATE_READ_LENGTH, &p_escs->lock_state);
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case BLE_UUID_ESCS_ADV_INTERVAL_CHAR:
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{
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nrf_ble_escs_adv_interval_t adv_interval = es_adv_interval_get();
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adv_interval = BYTES_SWAP_16BIT(adv_interval);
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return read_value(p_escs, sizeof(adv_interval), &adv_interval);
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}
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case BLE_UUID_ESCS_RADIO_TX_PWR_CHAR:
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return read_value(p_escs,
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sizeof(nrf_ble_escs_radio_tx_pwr_t),
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&p_reg->slots[active_slot].radio_tx_pwr);
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case BLE_UUID_ESCS_ADV_TX_PWR_CHAR:
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return read_value(p_escs,
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sizeof(nrf_ble_escs_radio_tx_pwr_t),
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p_reg->slots[active_slot].adv_custom_tx_power
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? (uint8_t *)(&p_reg->slots[active_slot].custom_tx_power)
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: (uint8_t *)(&p_reg->slots[active_slot].radio_tx_pwr));
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case BLE_UUID_ESCS_REMAIN_CONNECTABLE_CHAR:
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{
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uint8_t retval = APP_IS_REMAIN_CONNECTABLE_SUPPORTED;
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return read_value(p_escs, sizeof(retval), &retval);
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}
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case BLE_UUID_ESCS_EID_ID_KEY_CHAR:
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if (p_reg->slots[active_slot].configured &&
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(p_reg->slots[active_slot].adv_frame.type == ES_FRAME_TYPE_EID))
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{
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return read_value(p_escs,
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sizeof(nrf_ble_escs_eid_id_key_t),
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&p_reg->slots[active_slot].encrypted_eid_id_key);
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}
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else
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{
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return es_gatts_send_op_not_permitted(p_escs, true);
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}
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case BLE_UUID_ESCS_RW_ADV_SLOT_CHAR:
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return read_adv_slot(p_escs, active_slot, p_reg);
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default:
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return NRF_ERROR_INVALID_PARAM;
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}
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}
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