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- /**
- * Copyright (c) 2016 - 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.
- *
- */
- #include "sdk_config.h"
- #if NFC_T4T_APDU_ENABLED
- #include "nfc_t4t_apdu.h"
- #include "sdk_macros.h"
- #include "nordic_common.h"
- #include "app_util.h"
- #define NRF_LOG_MODULE_NAME nfc_t4t_apdu
- #if NFC_T4T_APDU_LOG_ENABLED
- #define NRF_LOG_LEVEL NFC_T4T_APDU_LOG_LEVEL
- #define NRF_LOG_INFO_COLOR NFC_T4T_APDU_LOG_COLOR
- #include "nrf_log.h"
- NRF_LOG_MODULE_REGISTER();
- #else // NFC_T4T_APDU_LOG_ENABLED
- #define NRF_LOG_LEVEL 0
- #include "nrf_log.h"
- #endif // NFC_T4T_APDU_LOG_ENABLED
- /**
- * @brief Field sizes that can be present in CAPDU.
- */
- #define CLASS_TYPE_SIZE 1U
- #define INSTRUCTION_TYPE_SIZE 1U
- #define PARAMETER_SIZE 2U
- #define LC_SHORT_FORMAT_SIZE 1U
- #define LC_LONG_FORMAT_SIZE 3U
- #define LE_SHORT_FORMAT_SIZE 1U
- #define LE_LONG_FORMAT_SIZE 2U
- /**
- * @brief Values used to encode Lc field in CAPDU.
- */
- #define LC_LONG_FORMAT_TOKEN 0x00
- #define LC_LONG_FORMAT_THR 0xFF
- /**
- * @brief Values used to encode Le field in CAPDU.
- */
- #define LE_FIELD_ABSENT 0U
- #define LE_LONG_FORMAT_THR 0x0100
- #define LE_ENCODED_VAL_256 0x00
- #define STATUS_SIZE 2U ///< Size of Status field contained in RAPDU.
- /**
- * @brief Function for calculating size of CAPDU.
- */
- __STATIC_INLINE uint16_t nfc_t4t_comm_apdu_size_calc(nfc_t4t_comm_apdu_t const * const p_cmd_apdu)
- {
- uint16_t res = CLASS_TYPE_SIZE + INSTRUCTION_TYPE_SIZE + PARAMETER_SIZE;
- if (p_cmd_apdu->data.p_buff != NULL)
- {
- if (p_cmd_apdu->data.len > LC_LONG_FORMAT_THR)
- {
- res += LC_LONG_FORMAT_SIZE;
- }
- else
- {
- res += LC_SHORT_FORMAT_SIZE;
- }
- }
- res += p_cmd_apdu->data.len;
- if (p_cmd_apdu->resp_len != LE_FIELD_ABSENT)
- {
- if (p_cmd_apdu->resp_len > LE_LONG_FORMAT_THR)
- {
- res += LE_LONG_FORMAT_SIZE;
- }
- else
- {
- res += LE_SHORT_FORMAT_SIZE;
- }
- }
- return res;
- }
- /**
- * @brief Function for validating arguments used by CAPDU encoding procedure.
- */
- __STATIC_INLINE ret_code_t nfc_t4t_comm_apdu_args_validate(nfc_t4t_comm_apdu_t const * const p_cmd_apdu,
- uint8_t * p_raw_data,
- uint16_t * const p_len)
- {
- if ((p_cmd_apdu == NULL) || (p_raw_data == NULL) || (p_len == NULL))
- {
- return NRF_ERROR_NULL;
- }
- if ((p_cmd_apdu->data.p_buff != NULL) && (p_cmd_apdu->data.len == 0))
- {
- return NRF_ERROR_INVALID_PARAM;
- }
- return NRF_SUCCESS;
- }
- ret_code_t nfc_t4t_comm_apdu_encode(nfc_t4t_comm_apdu_t const * const p_cmd_apdu,
- uint8_t * p_raw_data,
- uint16_t * const p_len)
- {
- // Validate passed arguments.
- ret_code_t err_code = nfc_t4t_comm_apdu_args_validate(p_cmd_apdu, p_raw_data, p_len);
- VERIFY_SUCCESS(err_code);
- // Check if there is enough memory in the provided buffer to store described CAPDU.
- uint16_t comm_apdu_len = nfc_t4t_comm_apdu_size_calc(p_cmd_apdu);
- if (comm_apdu_len > *p_len)
- {
- return NRF_ERROR_NO_MEM;
- }
- *p_len = comm_apdu_len;
- // Start to encode described CAPDU in the buffer.
- *p_raw_data++ = p_cmd_apdu->class_byte;
- *p_raw_data++ = p_cmd_apdu->instruction;
- *p_raw_data++ = MSB_16(p_cmd_apdu->parameter);
- *p_raw_data++ = LSB_16(p_cmd_apdu->parameter);
- // Check if optional data field should be included.
- if (p_cmd_apdu->data.p_buff != NULL)
- {
- if (p_cmd_apdu->data.len > LC_LONG_FORMAT_THR) // Use long data length encoding.
- {
- *p_raw_data++ = LC_LONG_FORMAT_TOKEN;
- *p_raw_data++ = MSB_16(p_cmd_apdu->data.len);
- *p_raw_data++ = LSB_16(p_cmd_apdu->data.len);
- }
- else // Use short data length encoding.
- {
- *p_raw_data++ = LSB_16(p_cmd_apdu->data.len);
- }
- memcpy(p_raw_data, p_cmd_apdu->data.p_buff, p_cmd_apdu->data.len);
- p_raw_data += p_cmd_apdu->data.len;
- }
- // Check if optional response length field present (Le) should be included.
- if (p_cmd_apdu->resp_len != LE_FIELD_ABSENT)
- {
- if (p_cmd_apdu->resp_len > LE_LONG_FORMAT_THR) // Use long response length encoding.
- {
- *p_raw_data++ = MSB_16(p_cmd_apdu->resp_len);
- *p_raw_data++ = LSB_16(p_cmd_apdu->resp_len);
- }
- else // Use short response length encoding.
- {
- if (p_cmd_apdu->resp_len == LE_LONG_FORMAT_THR)
- {
- *p_raw_data++ = LE_ENCODED_VAL_256;
- }
- else
- {
- *p_raw_data++ = LSB_16(p_cmd_apdu->resp_len);
- }
- }
- }
- return NRF_SUCCESS;
- }
- /**
- * @brief Function for validating arguments used by RAPDU decoding procedure.
- */
- __STATIC_INLINE ret_code_t nfc_t4t_resp_apdu_args_validate(nfc_t4t_resp_apdu_t const * const p_resp_apdu,
- uint8_t const * const p_raw_data,
- uint16_t len)
- {
- if ((p_resp_apdu == NULL) || (p_raw_data == NULL))
- {
- return NRF_ERROR_NULL;
- }
- if (len < STATUS_SIZE)
- {
- return NRF_ERROR_INVALID_LENGTH;
- }
- return NRF_SUCCESS;
- }
- ret_code_t nfc_t4t_resp_apdu_decode(nfc_t4t_resp_apdu_t * const p_resp_apdu,
- uint8_t const * const p_raw_data,
- uint16_t len)
- {
- // Validate passed arguments.
- ret_code_t err_code = nfc_t4t_resp_apdu_args_validate(p_resp_apdu, p_raw_data, len);
- VERIFY_SUCCESS(err_code);
- nfc_t4t_resp_apdu_clear(p_resp_apdu);
- if (len != STATUS_SIZE) // Optional data field is present in RAPDU.
- {
- p_resp_apdu->data.len = len - STATUS_SIZE;
- p_resp_apdu->data.p_buff = (uint8_t *) p_raw_data;
- }
- p_resp_apdu->status = uint16_big_decode(p_raw_data + p_resp_apdu->data.len);
- return NRF_SUCCESS;
- }
- void nfc_t4t_resp_apdu_printout(nfc_t4t_resp_apdu_t * p_resp_apdu)
- {
- NRF_LOG_INFO("R-APDU status: %4X ", p_resp_apdu->status);
- if (p_resp_apdu->data.p_buff != NULL)
- {
- NRF_LOG_INFO("R-APDU data: ");
- NRF_LOG_HEXDUMP_INFO(p_resp_apdu->data.p_buff, p_resp_apdu->data.len);
- }
- else
- {
- NRF_LOG_INFO("R-APDU no data field present.");
- }
- }
- #endif // NFC_T4T_APDU_ENABLED
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