/** * Copyright (c) 2017 - 2020, Nordic Semiconductor ASA * * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form, except as embedded into a Nordic * Semiconductor ASA integrated circuit in a product or a software update for * such product, must reproduce the above copyright notice, this list of * conditions and the following disclaimer in the documentation and/or other * materials provided with the distribution. * * 3. Neither the name of Nordic Semiconductor ASA nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * 4. This software, with or without modification, must only be used with a * Nordic Semiconductor ASA integrated circuit. * * 5. Any software provided in binary form under this license must not be reverse * engineered, decompiled, modified and/or disassembled. * * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ /** @file * * @defgroup usbd_ble_uart_freertos_example main.c * @{ * @brief USBD CDC ACM over BLE using FreeRTOS application main file. * * This file contains the source code for a sample application that uses the Nordic UART service * and USBD CDC ACM library and runs using FreeRTOS. * This application uses the @ref srvlib_conn_params module. */ #include #include #include "nordic_common.h" #include "nrf.h" #include "ble_hci.h" #include "ble_advdata.h" #include "ble_advertising.h" #include "ble_conn_params.h" #include "nrf_sdh.h" #include "nrf_sdh_soc.h" #include "nrf_sdh_ble.h" #include "nrf_sdh_freertos.h" #include "nrf_ble_gatt.h" #include "app_timer.h" #include "ble_nus.h" #include "app_uart.h" #include "app_util_platform.h" #include "bsp_btn_ble.h" #include "nrf_log.h" #include "nrf_log_ctrl.h" #include "nrf_log_default_backends.h" #include "nrf_drv_clock.h" #include "nrf_gpio.h" #include "nrf_delay.h" #include "nrf_drv_power.h" #include "fds.h" #include "app_error.h" #include "app_util.h" /* FreeRTOS related */ #include "FreeRTOS.h" #include "task.h" #include "semphr.h" #include "boards.h" #include "nrf_crypto.h" #include "nrf_crypto_error.h" #include "mem_manager.h" #define NRF_CRYPTO_EXAMPLE_AES_MAX_TEXT_SIZE 120 #define AES_ERROR_CHECK(error) \ do { \ if (error) \ { \ NRF_LOG_RAW_INFO("\r\nError = 0x%x\r\n%s\r\n", \ (error), \ nrf_crypto_error_string_get(error)); \ return; \ } \ } while (0); /* Maximum allowed key = 256 bit */ static uint8_t m_key[32] = {'N', 'O', 'R', 'D', 'I', 'C', ' ', 'S', 'E', 'M', 'I', 'C', 'O', 'N', 'D', 'U', 'C'};//, 'T', 'O', 'R', //'A', 'E', 'S', ' ', 'C', 'B', 'C', ' ', 'T', 'E', 'S', 'T'}; /* Below text is used as plain text for encryption and decryption in AES CBC mode with padding. */ static char m_plain_text[] = { "Example string to demonstrate AES CBC mode with padding. This text has 85 characters." }; /** * The size of the stack for the Logger task (in 32-bit words). * Logger uses sprintf internally so it is a rather stack hungry process. */ #define LOGGER_STACK_SIZE 512 /** * The size of the stack for the USB task (in 32-bit words). */ /** * The priority of the Logger task. */ #define LOGGER_PRIORITY 1 /** * The priority of the USBD task. */ /** * The maximum delay inside the USB task to wait for an event. */ #define USB_THREAD_MAX_BLOCK_TIME portMAX_DELAY #define LED_BLE_NUS_CONN (BSP_BOARD_LED_0) #define LED_BLE_NUS_RX (BSP_BOARD_LED_1) #define LED_CDC_ACM_CONN (BSP_BOARD_LED_2) #define LED_CDC_ACM_RX (BSP_BOARD_LED_3) #define LED_BLINK_INTERVAL 800 APP_TIMER_DEF(m_blink_ble); APP_TIMER_DEF(m_blink_cdc); /** * @brief App timer handler for blinking the LEDs. * * @param p_context LED to blink. */ void blink_handler(void * p_context) { bsp_board_led_invert((uint32_t) p_context); } #define ENDLINE_STRING "\r\n" // USB DEFINES START #define CDC_ACM_COMM_INTERFACE 0 #define CDC_ACM_DATA_INTERFACE 1 /** @brief CDC_ACM class instance. */ // USB DEFINES END // BLE DEFINES START #define APP_BLE_CONN_CFG_TAG 1 /**< A tag identifying the SoftDevice BLE configuration. */ #define APP_FEATURE_NOT_SUPPORTED BLE_GATT_STATUS_ATTERR_APP_BEGIN + 2 /**< Reply when unsupported features are requested. */ #define DEVICE_NAME "Nordic_USBD_BLE_UART" /**< Name of device. Will be included in the advertising data. */ #define NUS_SERVICE_UUID_TYPE BLE_UUID_TYPE_VENDOR_BEGIN /**< UUID type for the Nordic UART Service (vendor specific). */ #define APP_BLE_OBSERVER_PRIO 3 /**< Application's BLE observer priority. You shouldn't need to modify this value. */ #define APP_ADV_INTERVAL 480 /**< The advertising interval (in units of 0.625 ms. This value corresponds to 40 ms). */ #define APP_ADV_DURATION 18000 /**< The advertising duration (180 seconds) in units of 10 milliseconds. */ #define MIN_CONN_INTERVAL MSEC_TO_UNITS(20, UNIT_1_25_MS) /**< Minimum acceptable connection interval (20 ms). Connection interval uses 1.25 ms units. */ #define MAX_CONN_INTERVAL MSEC_TO_UNITS(75, UNIT_1_25_MS) /**< Maximum acceptable connection interval (75 ms). Connection interval uses 1.25 ms units. */ #define SLAVE_LATENCY 0 /**< Slave latency. */ #define CONN_SUP_TIMEOUT MSEC_TO_UNITS(4000, UNIT_10_MS) /**< Connection supervisory timeout (4 seconds). Supervision Timeout uses 10 ms units. */ #define FIRST_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(5000) /**< Time from initiating an event (connect or start of notification) to the first time sd_ble_gap_conn_param_update is called (5 seconds). */ #define NEXT_CONN_PARAMS_UPDATE_DELAY APP_TIMER_TICKS(30000) /**< Time between each call to sd_ble_gap_conn_param_update after the first call (30 seconds). */ #define MAX_CONN_PARAMS_UPDATE_COUNT 3 /**< Number of attempts before giving up the connection parameter negotiation. */ #define DEAD_BEEF 0xDEADBEEF /**< Value used as error code on stack dump. Can be used to identify stack location on stack unwind. */ #define UART_TX_BUF_SIZE 256 /**< UART TX buffer size. */ #define UART_RX_BUF_SIZE 256 /**< UART RX buffer size. */ BLE_NUS_DEF(m_nus, NRF_SDH_BLE_TOTAL_LINK_COUNT); /**< BLE NUS service instance. */ NRF_BLE_GATT_DEF(m_gatt); /**< GATT module instance. */ BLE_ADVERTISING_DEF(m_advertising); /**< Advertising module instance. */ static uint16_t m_conn_handle = BLE_CONN_HANDLE_INVALID; /**< Handle of the current connection. */ static uint16_t m_ble_nus_max_data_len = BLE_GATT_ATT_MTU_DEFAULT - 3; /**< Maximum length of data (in bytes) that can be transmitted to the peer by the Nordic UART service module. */ static ble_uuid_t m_adv_uuids[] = /**< Universally unique service identifier. */ { {BLE_UUID_NUS_SERVICE, NUS_SERVICE_UUID_TYPE} }; static char m_nus_data_array[BLE_NUS_MAX_DATA_LEN]; // BLE DEFINES END /** * @brief Function for assert macro callback. * * @details This function will be called in case of an assert in the SoftDevice. * * @warning This handler is an example only and does not fit a final product. You need to analyze * how your product is supposed to react in case of an assert. * @warning On assert from the SoftDevice, the system can only recover on reset. * * @param[in] line_num Line number of the failing ASSERT call. * @param[in] p_file_name File name of the failing ASSERT call. */ void assert_nrf_callback(uint16_t line_num, const uint8_t * p_file_name) { app_error_handler(DEAD_BEEF, line_num, p_file_name); } /** @brief Function for initializing the timer module. */ static void timers_init(void) { ret_code_t err_code = app_timer_init(); APP_ERROR_CHECK(err_code); err_code = app_timer_create(&m_blink_ble, APP_TIMER_MODE_REPEATED, blink_handler); APP_ERROR_CHECK(err_code); err_code = app_timer_create(&m_blink_cdc, APP_TIMER_MODE_REPEATED, blink_handler); APP_ERROR_CHECK(err_code); } /** * @brief Function for the GAP initialization. * * @details This function sets up all the necessary GAP (Generic Access Profile) parameters of * the device. It also sets the permissions and appearance. */ static void gap_params_init(void) { uint32_t err_code; ble_gap_conn_params_t gap_conn_params; ble_gap_conn_sec_mode_t sec_mode; BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode); err_code = sd_ble_gap_device_name_set(&sec_mode, (const uint8_t *) DEVICE_NAME, strlen(DEVICE_NAME)); APP_ERROR_CHECK(err_code); memset(&gap_conn_params, 0, sizeof(gap_conn_params)); gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL; gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL; gap_conn_params.slave_latency = SLAVE_LATENCY; gap_conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT; err_code = sd_ble_gap_ppcp_set(&gap_conn_params); APP_ERROR_CHECK(err_code); } /** * @brief Function for handling the data from the Nordic UART Service. * * @details This function processes the data received from the Nordic UART BLE Service and sends * it to the USBD CDC ACM module. * * @param[in] p_evt Nordic UART Service event. */ static void nus_data_handler(ble_nus_evt_t * p_evt) { if (p_evt->type == BLE_NUS_EVT_RX_DATA) { bsp_board_led_invert(LED_BLE_NUS_RX); NRF_LOG_DEBUG("Received data from BLE NUS. Writing data on CDC ACM."); NRF_LOG_HEXDUMP_DEBUG(p_evt->params.rx_data.p_data, p_evt->params.rx_data.length); memcpy(m_nus_data_array, p_evt->params.rx_data.p_data, p_evt->params.rx_data.length); // if(0==strcmp(m_nus_data_array,"Hi\r\n")) // { // uint16_t data_len=strlen("Hello"); // ble_nus_data_send(&m_nus, (uint8_t *)"Hello",&data_len,m_conn_handle); // } // else // { uint16_t data_len=strlen("Data rcvd"); ble_nus_data_send(&m_nus, (uint8_t *)"Data rcvd",&data_len,m_conn_handle); // } // memset(m_nus_data_array,0,sizeof(m_nus_data_array)); // Add endline characters uint16_t length = p_evt->params.rx_data.length; if (length + sizeof(ENDLINE_STRING) < BLE_NUS_MAX_DATA_LEN) { memcpy(m_nus_data_array + length, ENDLINE_STRING, sizeof(ENDLINE_STRING)); length += sizeof(ENDLINE_STRING); } } } /** @brief Function for initializing services that will be used by the application. */ static void services_init(void) { uint32_t err_code; ble_nus_init_t nus_init; memset(&nus_init, 0, sizeof(nus_init)); nus_init.data_handler = nus_data_handler; err_code = ble_nus_init(&m_nus, &nus_init); APP_ERROR_CHECK(err_code); } /** * @brief Function for handling errors from the Connection Parameters module. * * @param[in] nrf_error Error code containing information about what went wrong. */ static void conn_params_error_handler(uint32_t nrf_error) { APP_ERROR_HANDLER(nrf_error); } /** @brief Function for initializing the Connection Parameters module. */ static void conn_params_init(void) { uint32_t err_code; ble_conn_params_init_t cp_init; memset(&cp_init, 0, sizeof(cp_init)); cp_init.p_conn_params = NULL; cp_init.first_conn_params_update_delay = FIRST_CONN_PARAMS_UPDATE_DELAY; cp_init.next_conn_params_update_delay = NEXT_CONN_PARAMS_UPDATE_DELAY; cp_init.max_conn_params_update_count = MAX_CONN_PARAMS_UPDATE_COUNT; cp_init.start_on_notify_cccd_handle = BLE_GATT_HANDLE_INVALID; cp_init.disconnect_on_fail = true; cp_init.evt_handler = NULL; cp_init.error_handler = conn_params_error_handler; err_code = ble_conn_params_init(&cp_init); APP_ERROR_CHECK(err_code); } /** * @brief Function for putting the chip into sleep mode. * * @note This function does not return. */ static void sleep_mode_enter(void) { uint32_t err_code = bsp_indication_set(BSP_INDICATE_IDLE); APP_ERROR_CHECK(err_code); // Prepare wakeup buttons. err_code = bsp_btn_ble_sleep_mode_prepare(); APP_ERROR_CHECK(err_code); // Go to system-off mode (this function will not return; wakeup will cause a reset). err_code = sd_power_system_off(); APP_ERROR_CHECK(err_code); } /**@brief Function for starting advertising. */ static void advertising_start(void * p_context) { UNUSED_PARAMETER(p_context); uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST); APP_ERROR_CHECK(err_code); } /** * @brief Function for handling advertising events. * * @details This function is called for advertising events which are passed to the application. * * @param[in] ble_adv_evt Advertising event. */ static void on_adv_evt(ble_adv_evt_t ble_adv_evt) { uint32_t err_code; switch (ble_adv_evt) { case BLE_ADV_EVT_FAST: err_code = app_timer_start(m_blink_ble, APP_TIMER_TICKS(LED_BLINK_INTERVAL), (void *) LED_BLE_NUS_CONN); APP_ERROR_CHECK(err_code); break; case BLE_ADV_EVT_IDLE: NRF_LOG_INFO("Advertising timeout, restarting.") advertising_start(NULL); break; default: break; } } /** * @brief Function for handling BLE events. * * @param[in] p_ble_evt Bluetooth stack event. * @param[in] p_context Unused. */ static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context) { uint32_t err_code; switch (p_ble_evt->header.evt_id) { case BLE_GAP_EVT_CONNECTED: NRF_LOG_INFO("BLE NUS connected"); err_code = app_timer_stop(m_blink_ble); APP_ERROR_CHECK(err_code); bsp_board_led_on(LED_BLE_NUS_CONN); m_conn_handle = p_ble_evt->evt.gap_evt.conn_handle; break; case BLE_GAP_EVT_DISCONNECTED: NRF_LOG_INFO("BLE NUS disconnected"); // LED indication will be changed when advertising starts. m_conn_handle = BLE_CONN_HANDLE_INVALID; break; case BLE_GAP_EVT_PHY_UPDATE_REQUEST: { NRF_LOG_DEBUG("PHY update request."); ble_gap_phys_t const phys = { .rx_phys = BLE_GAP_PHY_AUTO, .tx_phys = BLE_GAP_PHY_AUTO, }; err_code = sd_ble_gap_phy_update(p_ble_evt->evt.gap_evt.conn_handle, &phys); APP_ERROR_CHECK(err_code); } break; case BLE_GAP_EVT_SEC_PARAMS_REQUEST: // Pairing not supported. err_code = sd_ble_gap_sec_params_reply(m_conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL); APP_ERROR_CHECK(err_code); break; case BLE_GAP_EVT_DATA_LENGTH_UPDATE_REQUEST: { ble_gap_data_length_params_t dl_params; // Clearing the struct will effectively set members to @ref BLE_GAP_DATA_LENGTH_AUTO. memset(&dl_params, 0, sizeof(ble_gap_data_length_params_t)); err_code = sd_ble_gap_data_length_update(p_ble_evt->evt.gap_evt.conn_handle, &dl_params, NULL); APP_ERROR_CHECK(err_code); } break; case BLE_GATTS_EVT_SYS_ATTR_MISSING: // No system attributes have been stored. err_code = sd_ble_gatts_sys_attr_set(m_conn_handle, NULL, 0, 0); APP_ERROR_CHECK(err_code); break; case BLE_GATTC_EVT_TIMEOUT: // Disconnect on GATT Client timeout event. err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gattc_evt.conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION); APP_ERROR_CHECK(err_code); break; case BLE_GATTS_EVT_TIMEOUT: // Disconnect on GATT Server timeout event. err_code = sd_ble_gap_disconnect(p_ble_evt->evt.gatts_evt.conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION); APP_ERROR_CHECK(err_code); break; case BLE_EVT_USER_MEM_REQUEST: err_code = sd_ble_user_mem_reply(p_ble_evt->evt.gattc_evt.conn_handle, NULL); APP_ERROR_CHECK(err_code); break; case BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST: { ble_gatts_evt_rw_authorize_request_t req; ble_gatts_rw_authorize_reply_params_t auth_reply; req = p_ble_evt->evt.gatts_evt.params.authorize_request; if (req.type != BLE_GATTS_AUTHORIZE_TYPE_INVALID) { if ((req.request.write.op == BLE_GATTS_OP_PREP_WRITE_REQ) || (req.request.write.op == BLE_GATTS_OP_EXEC_WRITE_REQ_NOW) || (req.request.write.op == BLE_GATTS_OP_EXEC_WRITE_REQ_CANCEL)) { if (req.type == BLE_GATTS_AUTHORIZE_TYPE_WRITE) { auth_reply.type = BLE_GATTS_AUTHORIZE_TYPE_WRITE; } else { auth_reply.type = BLE_GATTS_AUTHORIZE_TYPE_READ; } auth_reply.params.write.gatt_status = APP_FEATURE_NOT_SUPPORTED; err_code = sd_ble_gatts_rw_authorize_reply(p_ble_evt->evt.gatts_evt.conn_handle, &auth_reply); APP_ERROR_CHECK(err_code); } } } break; // BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST default: // No implementation needed. break; } } /** * @brief Function for the SoftDevice initialization. * * @details This function initializes the SoftDevice and the BLE event interrupt. */ static void ble_stack_init(void) { ret_code_t err_code; err_code = nrf_sdh_enable_request(); APP_ERROR_CHECK(err_code); // Configure the BLE stack using the default settings. // Fetch the start address of the application RAM. uint32_t ram_start = 0; err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &ram_start); APP_ERROR_CHECK(err_code); // Enable BLE stack. err_code = nrf_sdh_ble_enable(&ram_start); APP_ERROR_CHECK(err_code); // Register a handler for BLE events. NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL); } /** @brief Function for handling events from the GATT library. */ void gatt_evt_handler(nrf_ble_gatt_t * p_gatt, nrf_ble_gatt_evt_t const * p_evt) { if ((m_conn_handle == p_evt->conn_handle) && (p_evt->evt_id == NRF_BLE_GATT_EVT_ATT_MTU_UPDATED)) { m_ble_nus_max_data_len = p_evt->params.att_mtu_effective - OPCODE_LENGTH - HANDLE_LENGTH; NRF_LOG_INFO("Data len is set to 0x%X(%d)", m_ble_nus_max_data_len, m_ble_nus_max_data_len); } NRF_LOG_DEBUG("ATT MTU exchange completed. central 0x%x peripheral 0x%x", p_gatt->att_mtu_desired_central, p_gatt->att_mtu_desired_periph); } /** @brief Function for initializing the GATT library. */ void gatt_init(void) { ret_code_t err_code; err_code = nrf_ble_gatt_init(&m_gatt, gatt_evt_handler); APP_ERROR_CHECK(err_code); err_code = nrf_ble_gatt_att_mtu_periph_set(&m_gatt, 64); APP_ERROR_CHECK(err_code); } /** * @brief Function for handling events from the BSP module. * * @param[in] event Event generated by button press. */ void bsp_event_handler(bsp_event_t event) { uint32_t err_code; switch (event) { case BSP_EVENT_SLEEP: sleep_mode_enter(); break; case BSP_EVENT_DISCONNECT: err_code = sd_ble_gap_disconnect(m_conn_handle, BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION); if (err_code != NRF_ERROR_INVALID_STATE) { APP_ERROR_CHECK(err_code); } break; case BSP_EVENT_WHITELIST_OFF: if (m_conn_handle == BLE_CONN_HANDLE_INVALID) { err_code = ble_advertising_restart_without_whitelist(&m_advertising); if (err_code != NRF_ERROR_INVALID_STATE) { APP_ERROR_CHECK(err_code); } } break; default: break; } } /** @brief Function for initializing the Advertising functionality. */ static void advertising_init(void) { uint32_t err_code; ble_advertising_init_t init; memset(&init, 0, sizeof(init)); init.advdata.name_type = BLE_ADVDATA_FULL_NAME; init.advdata.include_appearance = false; init.advdata.flags = BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE; init.srdata.uuids_complete.uuid_cnt = sizeof(m_adv_uuids) / sizeof(m_adv_uuids[0]); init.srdata.uuids_complete.p_uuids = m_adv_uuids; init.config.ble_adv_fast_enabled = true; init.config.ble_adv_fast_interval = APP_ADV_INTERVAL; init.config.ble_adv_fast_timeout = APP_ADV_DURATION; init.evt_handler = on_adv_evt; err_code = ble_advertising_init(&m_advertising, &init); APP_ERROR_CHECK(err_code); ble_advertising_conn_cfg_tag_set(&m_advertising, APP_BLE_CONN_CFG_TAG); } /** @brief Function for initializing buttons and LEDs. */ static void buttons_leds_init(void) { uint32_t err_code = bsp_init(BSP_INIT_LEDS, bsp_event_handler); APP_ERROR_CHECK(err_code); } /** @brief Function for initializing the nrf_log module. */ static void log_init(void) { ret_code_t err_code = NRF_LOG_INIT(NULL); APP_ERROR_CHECK(err_code); NRF_LOG_DEFAULT_BACKENDS_INIT(); } // USB CODE START /** @brief User event handler @ref app_usbd_cdc_acm_user_ev_handler_t */ /**@brief A function which is hooked to idle task. * @note Idle hook must be enabled in FreeRTOS configuration (configUSE_IDLE_HOOK). */ void vApplicationIdleHook( void ) { } static char encrypted_text[NRF_CRYPTO_EXAMPLE_AES_MAX_TEXT_SIZE]; static char decrypted_text[NRF_CRYPTO_EXAMPLE_AES_MAX_TEXT_SIZE]; static void crypt_cbc(void) { uint8_t iv[16]; ret_code_t ret_val; size_t len_in; size_t len_out; static nrf_crypto_aes_context_t cbc_encr_128_ctx; // AES CBC encryption context static nrf_crypto_aes_context_t cbc_decr_128_ctx; // AES CBC decryption context memset(encrypted_text, 0, sizeof(encrypted_text)); memset(decrypted_text, 0, sizeof(decrypted_text)); // // Encryption phase // /* Init encryption context for 128 bit key and PKCS7 padding mode */ ret_val = nrf_crypto_aes_init(&cbc_encr_128_ctx, &g_nrf_crypto_aes_cbc_128_pad_pkcs7_info, NRF_CRYPTO_ENCRYPT); AES_ERROR_CHECK(ret_val); /* Set key for encryption context - only first 128 key bits will be used */ ret_val = nrf_crypto_aes_key_set(&cbc_encr_128_ctx, m_key); AES_ERROR_CHECK(ret_val); memset(iv, 0, sizeof(iv)); /* Set IV for encryption context */ ret_val = nrf_crypto_aes_iv_set(&cbc_encr_128_ctx, iv); AES_ERROR_CHECK(ret_val); len_in = strlen(m_plain_text); len_out = sizeof(encrypted_text); /* Encrypt text When padding is selected m_encrypted_text buffer shall be at least 16 bytes larger than text_len. */ ret_val = nrf_crypto_aes_finalize(&cbc_encr_128_ctx, (uint8_t *)m_plain_text, len_in, (uint8_t *)encrypted_text, &len_out); AES_ERROR_CHECK(ret_val); // // Decryption phase // /* Init decryption context for 128 bit key and PKCS7 padding mode */ ret_val = nrf_crypto_aes_init(&cbc_decr_128_ctx, &g_nrf_crypto_aes_cbc_128_pad_pkcs7_info, NRF_CRYPTO_DECRYPT); AES_ERROR_CHECK(ret_val); /* Set key for decryption context - only first 128 key bits will be used */ ret_val = nrf_crypto_aes_key_set(&cbc_decr_128_ctx, m_key); AES_ERROR_CHECK(ret_val); memset(iv, 0, sizeof(iv)); /* Set IV for decryption context */ ret_val = nrf_crypto_aes_iv_set(&cbc_decr_128_ctx, iv); AES_ERROR_CHECK(ret_val); /* Decrypt text */ ret_val = nrf_crypto_aes_finalize(&cbc_decr_128_ctx, (uint8_t *)encrypted_text, len_out, (uint8_t *)decrypted_text, &len_out); AES_ERROR_CHECK(ret_val); /* trim padding */ decrypted_text[len_out] = '\0'; NRF_LOG_FLUSH(); if (memcmp(m_plain_text, decrypted_text, strlen(m_plain_text)) == 0) { NRF_LOG_RAW_INFO("AES CBC example with padding executed successfully.\r\n"); } else { NRF_LOG_RAW_INFO("AES CBC example with padding failed!!!\r\n"); } } /* Flag to check fds initialization. */ static bool volatile m_fds_initialized; static void fds_evt_handler(fds_evt_t const * p_evt) { if (p_evt->result == NRF_SUCCESS) { // NRF_LOG_GREEN("Event: %s received (NRF_SUCCESS)", // fds_evt_str[p_evt->id]); } else { // NRF_LOG_GREEN("Event: %s received (%s)", // fds_evt_str[p_evt->id], // fds_err_str(p_evt->result)); } switch (p_evt->id) { case FDS_EVT_INIT: if (p_evt->result == NRF_SUCCESS) { m_fds_initialized = true; } break; case FDS_EVT_WRITE: { if (p_evt->result == NRF_SUCCESS) { NRF_LOG_INFO("Record ID:\t0x%04x", p_evt->write.record_id); NRF_LOG_INFO("File ID:\t0x%04x", p_evt->write.file_id); NRF_LOG_INFO("Record key:\t0x%04x", p_evt->write.record_key); } } break; case FDS_EVT_DEL_RECORD: { if (p_evt->result == NRF_SUCCESS) { NRF_LOG_INFO("Record ID:\t0x%04x", p_evt->del.record_id); NRF_LOG_INFO("File ID:\t0x%04x", p_evt->del.file_id); NRF_LOG_INFO("Record key:\t0x%04x", p_evt->del.record_key); } // m_delete_all.pending = false; } break; default: break; } } /**@brief Wait for fds to initialize. */ static void wait_for_fds_ready(void) { while (!m_fds_initialized) { int ocunt; ocunt++; } } /** @brief Application main function. */ int main(void) { ret_code_t ret; ble_stack_init(); // Initialize. log_init(); timers_init(); buttons_leds_init(); // ret = nrf_drv_power_init(NULL); // APP_ERROR_CHECK(ret); // ret = nrf_drv_clock_init(); // APP_ERROR_CHECK(ret); ret = nrf_crypto_init(); APP_ERROR_CHECK(ret); #if NRF_CRYPTO_BACKEND_MBEDTLS_ENABLED ret = nrf_mem_init(); APP_ERROR_CHECK(ret); #endif /* Register first to receive an event when initialization is complete. */ (void) fds_register(fds_evt_handler); NRF_LOG_INFO("Initializing fds..."); ret = fds_init(); APP_ERROR_CHECK(ret); /* Wait for fds to initialize. */ wait_for_fds_ready(); gap_params_init(); gatt_init(); services_init(); advertising_init(); conn_params_init(); crypt_cbc(); // Create a FreeRTOS task for the BLE stack. // The task will run advertising_start() before entering its loop. nrf_sdh_freertos_init(advertising_start, NULL); // Activate deep sleep mode. SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk; // Start FreeRTOS scheduler. vTaskStartScheduler(); for (;;) { APP_ERROR_HANDLER(NRF_ERROR_FORBIDDEN); } } /** * @} */