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