262 lines
8.5 KiB
C
262 lines
8.5 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 "sdk_config.h"
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#if NFC_T4T_APDU_ENABLED
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#include "nfc_t4t_apdu.h"
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#include "sdk_macros.h"
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#include "nordic_common.h"
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#include "app_util.h"
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#define NRF_LOG_MODULE_NAME nfc_t4t_apdu
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#if NFC_T4T_APDU_LOG_ENABLED
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#define NRF_LOG_LEVEL NFC_T4T_APDU_LOG_LEVEL
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#define NRF_LOG_INFO_COLOR NFC_T4T_APDU_LOG_COLOR
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#include "nrf_log.h"
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NRF_LOG_MODULE_REGISTER();
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#else // NFC_T4T_APDU_LOG_ENABLED
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#define NRF_LOG_LEVEL 0
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#include "nrf_log.h"
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#endif // NFC_T4T_APDU_LOG_ENABLED
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/**
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* @brief Field sizes that can be present in CAPDU.
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*/
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#define CLASS_TYPE_SIZE 1U
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#define INSTRUCTION_TYPE_SIZE 1U
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#define PARAMETER_SIZE 2U
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#define LC_SHORT_FORMAT_SIZE 1U
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#define LC_LONG_FORMAT_SIZE 3U
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#define LE_SHORT_FORMAT_SIZE 1U
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#define LE_LONG_FORMAT_SIZE 2U
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/**
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* @brief Values used to encode Lc field in CAPDU.
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*/
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#define LC_LONG_FORMAT_TOKEN 0x00
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#define LC_LONG_FORMAT_THR 0xFF
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/**
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* @brief Values used to encode Le field in CAPDU.
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*/
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#define LE_FIELD_ABSENT 0U
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#define LE_LONG_FORMAT_THR 0x0100
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#define LE_ENCODED_VAL_256 0x00
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#define STATUS_SIZE 2U ///< Size of Status field contained in RAPDU.
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/**
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* @brief Function for calculating size of CAPDU.
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*/
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__STATIC_INLINE uint16_t nfc_t4t_comm_apdu_size_calc(nfc_t4t_comm_apdu_t const * const p_cmd_apdu)
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{
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uint16_t res = CLASS_TYPE_SIZE + INSTRUCTION_TYPE_SIZE + PARAMETER_SIZE;
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if (p_cmd_apdu->data.p_buff != NULL)
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{
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if (p_cmd_apdu->data.len > LC_LONG_FORMAT_THR)
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{
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res += LC_LONG_FORMAT_SIZE;
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}
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else
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{
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res += LC_SHORT_FORMAT_SIZE;
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}
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}
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res += p_cmd_apdu->data.len;
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if (p_cmd_apdu->resp_len != LE_FIELD_ABSENT)
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{
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if (p_cmd_apdu->resp_len > LE_LONG_FORMAT_THR)
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{
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res += LE_LONG_FORMAT_SIZE;
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}
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else
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{
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res += LE_SHORT_FORMAT_SIZE;
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}
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}
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return res;
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}
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/**
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* @brief Function for validating arguments used by CAPDU encoding procedure.
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*/
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__STATIC_INLINE ret_code_t nfc_t4t_comm_apdu_args_validate(nfc_t4t_comm_apdu_t const * const p_cmd_apdu,
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uint8_t * p_raw_data,
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uint16_t * const p_len)
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{
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if ((p_cmd_apdu == NULL) || (p_raw_data == NULL) || (p_len == NULL))
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{
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return NRF_ERROR_NULL;
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}
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if ((p_cmd_apdu->data.p_buff != NULL) && (p_cmd_apdu->data.len == 0))
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{
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return NRF_ERROR_INVALID_PARAM;
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}
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return NRF_SUCCESS;
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}
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ret_code_t nfc_t4t_comm_apdu_encode(nfc_t4t_comm_apdu_t const * const p_cmd_apdu,
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uint8_t * p_raw_data,
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uint16_t * const p_len)
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{
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// Validate passed arguments.
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ret_code_t err_code = nfc_t4t_comm_apdu_args_validate(p_cmd_apdu, p_raw_data, p_len);
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VERIFY_SUCCESS(err_code);
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// Check if there is enough memory in the provided buffer to store described CAPDU.
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uint16_t comm_apdu_len = nfc_t4t_comm_apdu_size_calc(p_cmd_apdu);
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if (comm_apdu_len > *p_len)
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{
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return NRF_ERROR_NO_MEM;
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}
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*p_len = comm_apdu_len;
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// Start to encode described CAPDU in the buffer.
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*p_raw_data++ = p_cmd_apdu->class_byte;
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*p_raw_data++ = p_cmd_apdu->instruction;
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*p_raw_data++ = MSB_16(p_cmd_apdu->parameter);
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*p_raw_data++ = LSB_16(p_cmd_apdu->parameter);
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// Check if optional data field should be included.
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if (p_cmd_apdu->data.p_buff != NULL)
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{
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if (p_cmd_apdu->data.len > LC_LONG_FORMAT_THR) // Use long data length encoding.
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{
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*p_raw_data++ = LC_LONG_FORMAT_TOKEN;
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*p_raw_data++ = MSB_16(p_cmd_apdu->data.len);
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*p_raw_data++ = LSB_16(p_cmd_apdu->data.len);
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}
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else // Use short data length encoding.
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{
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*p_raw_data++ = LSB_16(p_cmd_apdu->data.len);
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}
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memcpy(p_raw_data, p_cmd_apdu->data.p_buff, p_cmd_apdu->data.len);
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p_raw_data += p_cmd_apdu->data.len;
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}
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// Check if optional response length field present (Le) should be included.
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if (p_cmd_apdu->resp_len != LE_FIELD_ABSENT)
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{
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if (p_cmd_apdu->resp_len > LE_LONG_FORMAT_THR) // Use long response length encoding.
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{
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*p_raw_data++ = MSB_16(p_cmd_apdu->resp_len);
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*p_raw_data++ = LSB_16(p_cmd_apdu->resp_len);
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}
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else // Use short response length encoding.
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{
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if (p_cmd_apdu->resp_len == LE_LONG_FORMAT_THR)
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{
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*p_raw_data++ = LE_ENCODED_VAL_256;
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}
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else
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{
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*p_raw_data++ = LSB_16(p_cmd_apdu->resp_len);
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}
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}
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}
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return NRF_SUCCESS;
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}
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/**
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* @brief Function for validating arguments used by RAPDU decoding procedure.
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*/
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__STATIC_INLINE ret_code_t nfc_t4t_resp_apdu_args_validate(nfc_t4t_resp_apdu_t const * const p_resp_apdu,
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uint8_t const * const p_raw_data,
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uint16_t len)
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{
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if ((p_resp_apdu == NULL) || (p_raw_data == NULL))
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{
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return NRF_ERROR_NULL;
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}
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if (len < STATUS_SIZE)
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{
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return NRF_ERROR_INVALID_LENGTH;
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}
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return NRF_SUCCESS;
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}
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ret_code_t nfc_t4t_resp_apdu_decode(nfc_t4t_resp_apdu_t * const p_resp_apdu,
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uint8_t const * const p_raw_data,
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uint16_t len)
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{
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// Validate passed arguments.
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ret_code_t err_code = nfc_t4t_resp_apdu_args_validate(p_resp_apdu, p_raw_data, len);
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VERIFY_SUCCESS(err_code);
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nfc_t4t_resp_apdu_clear(p_resp_apdu);
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if (len != STATUS_SIZE) // Optional data field is present in RAPDU.
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{
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p_resp_apdu->data.len = len - STATUS_SIZE;
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p_resp_apdu->data.p_buff = (uint8_t *) p_raw_data;
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}
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p_resp_apdu->status = uint16_big_decode(p_raw_data + p_resp_apdu->data.len);
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return NRF_SUCCESS;
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}
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void nfc_t4t_resp_apdu_printout(nfc_t4t_resp_apdu_t * p_resp_apdu)
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{
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NRF_LOG_INFO("R-APDU status: %4X ", p_resp_apdu->status);
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if (p_resp_apdu->data.p_buff != NULL)
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{
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NRF_LOG_INFO("R-APDU data: ");
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NRF_LOG_HEXDUMP_INFO(p_resp_apdu->data.p_buff, p_resp_apdu->data.len);
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}
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else
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{
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NRF_LOG_INFO("R-APDU no data field present.");
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}
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}
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#endif // NFC_T4T_APDU_ENABLED
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