/** * Copyright (c) 2015 - 2017, 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. * */ #include "sdk_common.h" #if NRF_MODULE_ENABLED(ANT_ENCRYPT_CONFIG) #include #include "ant_encrypt_config.h" #include "ant_interface.h" #include "ant_parameters.h" #ifdef ANT_ENCRYPT_NEGOTIATION_SLAVE_ENABLED #include "ant_encrypt_negotiation_slave.h" #endif /*lint -e551 -save*/ /** Flag for checking if stack was configured for encryption. */ static bool m_stack_encryption_configured = false; /*lint -restore */ /** Pointer to handler of module's events. */ static ant_encryp_user_handler_t m_ant_enc_evt_handler = NULL; static ret_code_t ant_enc_advance_burs_config_apply( ant_encrypt_adv_burst_settings_t const * const p_adv_burst_set); ret_code_t ant_stack_encryption_config(ant_encrypt_stack_settings_t const * const p_crypto_set) { ret_code_t err_code; for ( uint32_t i = 0; i < p_crypto_set->key_number; i++) { err_code = sd_ant_crypto_key_set(i, p_crypto_set->pp_key[i]); VERIFY_SUCCESS(err_code); } if (p_crypto_set->p_adv_burst_config != NULL) { err_code = ant_enc_advance_burs_config_apply(p_crypto_set->p_adv_burst_config); VERIFY_SUCCESS(err_code); } // subcomands LUT for @ref sd_ant_crypto_info_set calls const uint8_t set_enc_info_param_lut[] = { ENCRYPTION_INFO_SET_CRYPTO_ID, ENCRYPTION_INFO_SET_CUSTOM_USER_DATA, ENCRYPTION_INFO_SET_RNG_SEED }; for ( uint32_t i = 0; i < sizeof(set_enc_info_param_lut); i++) { if ( p_crypto_set->info.pp_array[i] != NULL) { err_code = sd_ant_crypto_info_set(set_enc_info_param_lut[i], p_crypto_set->info.pp_array[i]); VERIFY_SUCCESS(err_code); } } #ifdef ANT_ENCRYPT_NEGOTIATION_SLAVE_ENABLED // all ANT channels have unsupported slave encryption tracking (even master's channel) ant_channel_encryp_negotiation_slave_init(); #endif m_ant_enc_evt_handler = NULL; m_stack_encryption_configured = true; return NRF_SUCCESS; } /** * @brief Function for configuring advanced burst settings according to encryption requirements. * * @param p_adv_burst_set Pointer to ANT advanced burst settings. * * @retval Value returned by @ref sd_ant_adv_burst_config_set. */ static ret_code_t ant_enc_advance_burs_config_apply( ant_encrypt_adv_burst_settings_t const * const p_adv_burst_set) { uint8_t adv_burst_conf_str[ADV_BURST_CFG_MIN_SIZE] = { ADV_BURST_MODE_ENABLE, 0, 0, 0, 0, 0, 0, 0 }; adv_burst_conf_str[ADV_BURST_CFG_PACKET_SIZE_INDEX] = p_adv_burst_set->packet_length; adv_burst_conf_str[ADV_BURST_CFG_REQUIRED_FEATURES] = p_adv_burst_set->required_feature; adv_burst_conf_str[ADV_BURST_CFG_OPTIONAL_FEATURES] = p_adv_burst_set->optional_feature; return sd_ant_adv_burst_config_set(adv_burst_conf_str, sizeof(adv_burst_conf_str)); } ret_code_t ant_channel_encrypt_config_perform(uint8_t channel_number, ant_encrypt_channel_settings_t * p_crypto_config) { return sd_ant_crypto_channel_enable(channel_number, p_crypto_config->mode, p_crypto_config->key_index, p_crypto_config->decimation_rate); } ret_code_t ant_channel_encrypt_config(uint8_t channel_type, uint8_t channel_number, ant_encrypt_channel_settings_t * p_crypto_config) { ret_code_t err_code; if (p_crypto_config != NULL) { // encryption of the stack should be initialized previously if (m_stack_encryption_configured == false) { return NRF_ERROR_MODULE_NOT_INITIALZED; } switch (channel_type) { case CHANNEL_TYPE_MASTER: err_code = ant_channel_encrypt_config_perform(channel_number, p_crypto_config); #ifdef ANT_ENCRYPT_NEGOTIATION_SLAVE_ENABLED ant_channel_encryp_tracking_state_set(channel_number, ANT_ENC_CHANNEL_STAT_TRACKING_UNSUPPORTED); #endif break; #ifdef ANT_ENCRYPT_NEGOTIATION_SLAVE_ENABLED case CHANNEL_TYPE_SLAVE: ant_slave_channel_encrypt_config(channel_number, p_crypto_config); if (p_crypto_config->mode == ENCRYPTION_DISABLED_MODE) { err_code = ant_channel_encrypt_config_perform(channel_number, p_crypto_config); ant_channel_encryp_tracking_state_set(channel_number, ANT_ENC_CHANNEL_STAT_TRACKING_UNSUPPORTED); } else { ant_channel_encryp_tracking_state_set(channel_number, ANT_ENC_CHANNEL_STAT_NOT_TRACKING); err_code = NRF_SUCCESS; } break; #endif default: err_code = NRF_ERROR_INVALID_PARAM; break; } } else { #ifdef ANT_ENCRYPT_NEGOTIATION_SLAVE_ENABLED ant_channel_encryp_tracking_state_set(channel_number, ANT_ENC_CHANNEL_STAT_TRACKING_UNSUPPORTED); #endif err_code = NRF_SUCCESS; } return err_code; } /** @brief Function for calling the handler of module events.*/ static void ant_encrypt_user_handler_try_to_run(uint8_t ant_channel, ant_encrypt_user_evt_t event) { if (m_ant_enc_evt_handler != NULL) { m_ant_enc_evt_handler(ant_channel, event); } } void ant_encrypt_event_handler(ant_evt_t * p_ant_evt) { uint8_t const ant_channel = p_ant_evt->channel; #ifdef ANT_ENCRYPT_NEGOTIATION_SLAVE_ENABLED ant_slave_encrypt_negotiation(p_ant_evt); #endif switch (p_ant_evt->event) { case EVENT_RX_FAIL_GO_TO_SEARCH: ant_encrypt_user_handler_try_to_run(ant_channel, ANT_ENC_EVT_CHANNEL_LOST); break; case EVENT_ENCRYPT_NEGOTIATION_SUCCESS: ant_encrypt_user_handler_try_to_run(ant_channel, ANT_ENC_EVT_NEGOTIATION_SUCCESS); break; case EVENT_ENCRYPT_NEGOTIATION_FAIL: ant_encrypt_user_handler_try_to_run(ant_channel, ANT_ENC_EVT_NEGOTIATION_FAIL); break; } } void ant_enc_event_handler_register(ant_encryp_user_handler_t user_handler_func) { m_ant_enc_evt_handler = user_handler_func; } #endif // NRF_MODULE_ENABLED(ANT_ENCRYPT_CONFIG)