flipperzero-firmware/lib/ST25RFAL002/source/rfal_nfcf.c

/******************************************************************************
  * \attention
  *
  * <h2><center>&copy; COPYRIGHT 2020 STMicroelectronics</center></h2>
  *
  * Licensed under ST MYLIBERTY SOFTWARE LICENSE AGREEMENT (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        www.st.com/myliberty
  *
  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied,
  * AND SPECIFICALLY DISCLAIMING THE IMPLIED WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
******************************************************************************/

/*
 *      PROJECT:   ST25R391x firmware
 *      Revision:
 *      LANGUAGE:  ISO C99
 */

/*! \file rfal_nfcf.c
 *
 *  \author Gustavo Patricio
 *
 *  \brief Implementation of NFC-F Poller (FeliCa PCD) device
 *
 *  The definitions and helpers methods provided by this module are 
 *  aligned with NFC-F (FeliCa - JIS X6319-4)
 *
 */

/*
 ******************************************************************************
 * INCLUDES
 ******************************************************************************
 */
#include "rfal_nfcf.h"
#include "utils.h"

/*
 ******************************************************************************
 * ENABLE SWITCH
 ******************************************************************************
 */

#ifndef RFAL_FEATURE_NFCF
#define RFAL_FEATURE_NFCF false /* NFC-F module configuration missing. Disabled by default */
#endif

#if RFAL_FEATURE_NFCF

/*
 ******************************************************************************
 * GLOBAL DEFINES
 ******************************************************************************
 */
#define RFAL_NFCF_SENSF_REQ_LEN_MIN \
    5U /*!< SENSF_RES minimum length                              */

#define RFAL_NFCF_READ_WO_ENCRYPTION_MIN_LEN \
    15U /*!< Minimum length for a Check Command         T3T  5.4.1 */
#define RFAL_NFCF_WRITE_WO_ENCRYPTION_MIN_LEN \
    31U /*!< Minimum length for an Update Command       T3T  5.5.1 */

#define RFAL_NFCF_CHECK_RES_MIN_LEN \
    11U /*!< CHECK Response minimum length       T3T 1.0  Table 8  */
#define RFAL_NFCF_UPDATE_RES_MIN_LEN \
    11U /*!< UPDATE Response minimum length      T3T 1.0  Table 8  */

#define RFAL_NFCF_CHECK_REQ_MAX_LEN \
    86U /*!< Max length of a Check request        T3T 1.0  Table 7 */
#define RFAL_NFCF_CHECK_REQ_MAX_SERV \
    15U /*!< Max Services number on Check request T3T 1.0  5.4.1.5 */
#define RFAL_NFCF_CHECK_REQ_MAX_BLOCK \
    15U /*!< Max Blocks number on Check request  T3T 1.0  5.4.1.10 */
#define RFAL_NFCF_UPDATE_REQ_MAX_SERV \
    15U /*!< Max Services number Update request  T3T 1.0  5.4.1.5  */
#define RFAL_NFCF_UPDATE_REQ_MAX_BLOCK \
    13U /*!< Max Blocks number on Update request T3T 1.0  5.4.1.10 */

/*! MRT Check | Uupdate = (Tt3t x ((A+1) + n (B+1)) x 4^E) + dRWTt3t    T3T  5.8
    Max values used: A = 7 ; B = 7 ; E = 3 ; n = 15 (NFC Forum n = 15, JIS n = 32)
*/
#define RFAL_NFCF_MRT_CHECK_UPDATE ((4096 * (8 + (15 * 8)) * 64) + 16)

/*
 ******************************************************************************
 * GLOBAL MACROS
 ******************************************************************************
 */
#define rfalNfcfSlots2CardNum(s) \
    ((uint8_t)(s) + 1U) /*!< Converts Time Slot Number (TSN) into num of slots  */

/*
******************************************************************************
* GLOBAL TYPES
******************************************************************************
*/

/*! Structure/Buffer to hold the SENSF_RES with LEN byte prepended                                 */
typedef struct {
    uint8_t LEN; /*!< NFC-F LEN byte                      */
    rfalNfcfSensfRes SENSF_RES; /*!< SENSF_RES                           */
} rfalNfcfSensfResBuf;

/*! Greedy collection for NFCF GRE_POLL_F  Activity 1.0 Table 10                                   */
typedef struct {
    uint8_t pollFound; /*!< Number of devices found by the Poll */
    uint8_t pollCollision; /*!< Number of collisions detected       */
    rfalFeliCaPollRes POLL_F[RFAL_NFCF_POLL_MAXCARDS]; /*!< GRE_POLL_F   Activity 1.0 Table 10  */
} rfalNfcfGreedyF;

/*! NFC-F SENSF_REQ format  Digital 1.1  8.6.1                     */
typedef struct {
    uint8_t CMD; /*!< Command code: 00h  */
    uint8_t SC[RFAL_NFCF_SENSF_SC_LEN]; /*!< System Code        */
    uint8_t RC; /*!< Request Code       */
    uint8_t TSN; /*!< Time Slot Number   */
} rfalNfcfSensfReq;

/*
******************************************************************************
* LOCAL VARIABLES
******************************************************************************
*/
static rfalNfcfGreedyF gRfalNfcfGreedyF; /*!< Activity's NFCF Greedy collection */

/*
******************************************************************************
* LOCAL FUNCTION PROTOTYPES
******************************************************************************
*/
static void rfalNfcfComputeValidSENF(
    rfalNfcfListenDevice* outDevInfo,
    uint8_t* curDevIdx,
    uint8_t devLimit,
    bool overwrite,
    bool* nfcDepFound);

/*
******************************************************************************
* LOCAL VARIABLES
******************************************************************************
*/

/*******************************************************************************/
static void rfalNfcfComputeValidSENF(
    rfalNfcfListenDevice* outDevInfo,
    uint8_t* curDevIdx,
    uint8_t devLimit,
    bool overwrite,
    bool* nfcDepFound) {
    uint8_t tmpIdx;
    bool duplicate;
    const rfalNfcfSensfResBuf* sensfBuf;
    rfalNfcfSensfResBuf sensfCopy;

    /*******************************************************************************/
    /* Go through all responses check if valid and duplicates                      */
    /*******************************************************************************/
    while((gRfalNfcfGreedyF.pollFound > 0U) && ((*curDevIdx) < devLimit)) {
        duplicate = false;
        gRfalNfcfGreedyF.pollFound--;

        /* MISRA 11.3 - Cannot point directly into different object type, use local copy */
        ST_MEMCPY(
            (uint8_t*)&sensfCopy,
            (uint8_t*)&gRfalNfcfGreedyF.POLL_F[gRfalNfcfGreedyF.pollFound],
            sizeof(rfalNfcfSensfResBuf));

        /* Point to received SENSF_RES */
        sensfBuf = &sensfCopy;

        /* Check for devices that are already in device list */
        for(tmpIdx = 0; tmpIdx < (*curDevIdx); tmpIdx++) {
            if(ST_BYTECMP(
                   sensfBuf->SENSF_RES.NFCID2,
                   outDevInfo[tmpIdx].sensfRes.NFCID2,
                   RFAL_NFCF_NFCID2_LEN) == 0) {
                duplicate = true;
                break;
            }
        }

        /* If is a duplicate skip this (and not to overwrite)*/
        if(duplicate && !overwrite) {
            continue;
        }

        /* Check if response length is OK */
        if(((sensfBuf->LEN - RFAL_NFCF_HEADER_LEN) < RFAL_NFCF_SENSF_RES_LEN_MIN) ||
           ((sensfBuf->LEN - RFAL_NFCF_HEADER_LEN) > RFAL_NFCF_SENSF_RES_LEN_MAX)) {
            continue;
        }

        /* Check if the response is a SENSF_RES / Polling response */
        if(sensfBuf->SENSF_RES.CMD != (uint8_t)RFAL_NFCF_CMD_POLLING_RES) {
            continue;
        }

        /* Check if is an overwrite request or new device*/
        if(duplicate && overwrite) {
            /* overwrite deviceInfo/GRE_SENSF_RES with SENSF_RES */
            outDevInfo[tmpIdx].sensfResLen = (sensfBuf->LEN - RFAL_NFCF_LENGTH_LEN);
            ST_MEMCPY(
                &outDevInfo[tmpIdx].sensfRes,
                &sensfBuf->SENSF_RES,
                outDevInfo[tmpIdx].sensfResLen);
            continue;
        } else {
            /* fill deviceInfo/GRE_SENSF_RES with new SENSF_RES */
            outDevInfo[(*curDevIdx)].sensfResLen = (sensfBuf->LEN - RFAL_NFCF_LENGTH_LEN);
            ST_MEMCPY(
                &outDevInfo[(*curDevIdx)].sensfRes,
                &sensfBuf->SENSF_RES,
                outDevInfo[(*curDevIdx)].sensfResLen);
        }

        /* Check if this device supports NFC-DEP and signal it (ACTIVITY 1.1   9.3.6.63) */
        *nfcDepFound = rfalNfcfIsNfcDepSupported(&outDevInfo[(*curDevIdx)]);

        (*curDevIdx)++;
    }
}

/*
******************************************************************************
* GLOBAL FUNCTIONS
******************************************************************************
*/

/*******************************************************************************/
ReturnCode rfalNfcfPollerInitialize(rfalBitRate bitRate) {
    ReturnCode ret;

    if((bitRate != RFAL_BR_212) && (bitRate != RFAL_BR_424)) {
        return ERR_PARAM;
    }

    EXIT_ON_ERR(ret, rfalSetMode(RFAL_MODE_POLL_NFCF, bitRate, bitRate));
    rfalSetErrorHandling(RFAL_ERRORHANDLING_NFC);

    rfalSetGT(RFAL_GT_NFCF);
    rfalSetFDTListen(RFAL_FDT_LISTEN_NFCF_POLLER);
    rfalSetFDTPoll(RFAL_FDT_POLL_NFCF_POLLER);

    return ERR_NONE;
}

/*******************************************************************************/
ReturnCode rfalNfcfPollerPoll(
    rfalFeliCaPollSlots slots,
    uint16_t sysCode,
    uint8_t reqCode,
    rfalFeliCaPollRes* cardList,
    uint8_t* devCnt,
    uint8_t* collisions) {
    return rfalFeliCaPoll(
        slots, sysCode, reqCode, cardList, rfalNfcfSlots2CardNum(slots), devCnt, collisions);
}

/*******************************************************************************/
ReturnCode rfalNfcfPollerCheckPresence(void) {
    gRfalNfcfGreedyF.pollFound = 0;
    gRfalNfcfGreedyF.pollCollision = 0;

    /* ACTIVITY 1.0 & 1.1 - 9.2.3.17 SENSF_REQ  must be with number of slots equal to 4
     *                                SC must be 0xFFFF
     *                                RC must be 0x00 (No system code info required) */
    return rfalFeliCaPoll(
        RFAL_FELICA_4_SLOTS,
        RFAL_NFCF_SYSTEMCODE,
        RFAL_FELICA_POLL_RC_NO_REQUEST,
        gRfalNfcfGreedyF.POLL_F,
        rfalNfcfSlots2CardNum(RFAL_FELICA_4_SLOTS),
        &gRfalNfcfGreedyF.pollFound,
        &gRfalNfcfGreedyF.pollCollision);
}

/*******************************************************************************/
ReturnCode rfalNfcfPollerCollisionResolution(
    rfalComplianceMode compMode,
    uint8_t devLimit,
    rfalNfcfListenDevice* nfcfDevList,
    uint8_t* devCnt) {
    ReturnCode ret;
    bool nfcDepFound;

    if((nfcfDevList == NULL) || (devCnt == NULL)) {
        return ERR_PARAM;
    }

    *devCnt = 0;
    nfcDepFound = false;

    /*******************************************************************************************/
    /* ACTIVITY 1.0 - 9.3.6.3 Copy valid SENSF_RES in GRE_POLL_F into GRE_SENSF_RES            */
    /* ACTIVITY 1.0 - 9.3.6.6 The NFC Forum Device MUST remove all entries from GRE_SENSF_RES[]*/
    /* ACTIVITY 1.1 - 9.3.63.59 Populate GRE_SENSF_RES with data from GRE_POLL_F               */
    /*                                                                                         */
    /* CON_DEVICES_LIMIT = 0 Just check if devices from Tech Detection exceeds -> always true  */
    /* Allow the number of slots open on Technology Detection                                  */
    /*******************************************************************************************/
    rfalNfcfComputeValidSENF(
        nfcfDevList,
        devCnt,
        ((devLimit == 0U) ? rfalNfcfSlots2CardNum(RFAL_FELICA_4_SLOTS) : devLimit),
        false,
        &nfcDepFound);

    /*******************************************************************************/
    /* ACTIVITY 1.0 - 9.3.6.4                                                      */
    /* ACTIVITY 1.1 - 9.3.63.60 Check if devices found are lower than the limit    */
    /* and send a SENSF_REQ if so                                                  */
    /*******************************************************************************/
    if(*devCnt < devLimit) {
        /* ACTIVITY 1.0 - 9.3.6.5  Copy valid SENSF_RES and then to remove it
         * ACTIVITY 1.1 - 9.3.6.65 Copy and filter duplicates                                           
         * For now, due to some devices keep generating different nfcid2, we use 1.0  
         * Phones detected: Samsung Galaxy Nexus,Samsung Galaxy S3,Samsung Nexus S */
        *devCnt = 0;

        ret = rfalNfcfPollerPoll(
            RFAL_FELICA_16_SLOTS,
            RFAL_NFCF_SYSTEMCODE,
            RFAL_FELICA_POLL_RC_NO_REQUEST,
            gRfalNfcfGreedyF.POLL_F,
            &gRfalNfcfGreedyF.pollFound,
            &gRfalNfcfGreedyF.pollCollision);
        if(ret == ERR_NONE) {
            rfalNfcfComputeValidSENF(nfcfDevList, devCnt, devLimit, false, &nfcDepFound);
        }

        /*******************************************************************************/
        /* ACTIVITY 1.1 -  9.3.6.63 Check if any device supports NFC DEP               */
        /*******************************************************************************/
        if(nfcDepFound && (compMode == RFAL_COMPLIANCE_MODE_NFC)) {
            ret = rfalNfcfPollerPoll(
                RFAL_FELICA_16_SLOTS,
                RFAL_NFCF_SYSTEMCODE,
                RFAL_FELICA_POLL_RC_SYSTEM_CODE,
                gRfalNfcfGreedyF.POLL_F,
                &gRfalNfcfGreedyF.pollFound,
                &gRfalNfcfGreedyF.pollCollision);
            if(ret == ERR_NONE) {
                rfalNfcfComputeValidSENF(nfcfDevList, devCnt, devLimit, true, &nfcDepFound);
            }
        }
    }

    return ERR_NONE;
}

/*******************************************************************************/
ReturnCode rfalNfcfPollerCheck(
    const uint8_t* nfcid2,
    const rfalNfcfServBlockListParam* servBlock,
    uint8_t* rxBuf,
    uint16_t rxBufLen,
    uint16_t* rcvdLen) {
    uint8_t txBuf[RFAL_NFCF_CHECK_REQ_MAX_LEN];
    uint8_t msgIt;
    uint8_t i;
    ReturnCode ret;
    const uint8_t* checkRes;

    /* Check parameters */
    if((nfcid2 == NULL) || (rxBuf == NULL) || (servBlock == NULL) || (servBlock->numBlock == 0U) ||
       (servBlock->numBlock > RFAL_NFCF_CHECK_REQ_MAX_BLOCK) || (servBlock->numServ == 0U) ||
       (servBlock->numServ > RFAL_NFCF_CHECK_REQ_MAX_SERV) ||
       (rxBufLen < (RFAL_NFCF_LENGTH_LEN + RFAL_NFCF_CHECK_RES_MIN_LEN))) {
        return ERR_PARAM;
    }

    msgIt = 0;

    /*******************************************************************************/
    /* Compose CHECK command/request                                               */

    txBuf[msgIt++] = RFAL_NFCF_CMD_READ_WITHOUT_ENCRYPTION; /* Command Code    */

    ST_MEMCPY(&txBuf[msgIt], nfcid2, RFAL_NFCF_NFCID2_LEN); /* NFCID2          */
    msgIt += RFAL_NFCF_NFCID2_LEN;

    txBuf[msgIt++] = servBlock->numServ; /* NoS             */
    for(i = 0; i < servBlock->numServ; i++) {
        txBuf[msgIt++] = (uint8_t)((servBlock->servList[i] >> 0U) & 0xFFU); /* Service Code    */
        txBuf[msgIt++] = (uint8_t)((servBlock->servList[i] >> 8U) & 0xFFU);
    }

    txBuf[msgIt++] = servBlock->numBlock; /* NoB             */
    for(i = 0; i < servBlock->numBlock; i++) {
        txBuf[msgIt++] =
            servBlock->blockList[i].conf; /* Block list element conf (Flag|Access|Service) */
        if((servBlock->blockList[i].conf & 0x80U) !=
           0U) /* Check if 2 or 3 byte block list element       */
        {
            txBuf[msgIt++] =
                (uint8_t)(servBlock->blockList[i].blockNum & 0xFFU); /* 1byte Block Num */
        } else {
            txBuf[msgIt++] =
                (uint8_t)((servBlock->blockList[i].blockNum >> 0U) & 0xFFU); /* 2byte Block Num */
            txBuf[msgIt++] = (uint8_t)((servBlock->blockList[i].blockNum >> 8U) & 0xFFU);
        }
    }

    /*******************************************************************************/
    /* Transceive CHECK command/request                                            */
    ret = rfalTransceiveBlockingTxRx(
        txBuf,
        msgIt,
        rxBuf,
        rxBufLen,
        rcvdLen,
        RFAL_TXRX_FLAGS_DEFAULT,
        RFAL_NFCF_MRT_CHECK_UPDATE);

    if(ret == ERR_NONE) {
        /* Skip LEN byte */
        checkRes = (rxBuf + RFAL_NFCF_LENGTH_LEN);

        /* Check response length */
        if(*rcvdLen < (RFAL_NFCF_LENGTH_LEN + RFAL_NFCF_CHECKUPDATE_RES_ST2_POS)) {
            ret = ERR_PROTO;
        }
        /* Check for a valid response */
        else if(
            (checkRes[RFAL_NFCF_CMD_POS] != (uint8_t)RFAL_NFCF_CMD_READ_WITHOUT_ENCRYPTION_RES) ||
            (checkRes[RFAL_NFCF_CHECKUPDATE_RES_ST1_POS] != RFAL_NFCF_STATUS_FLAG_SUCCESS) ||
            (checkRes[RFAL_NFCF_CHECKUPDATE_RES_ST2_POS] != RFAL_NFCF_STATUS_FLAG_SUCCESS)) {
            ret = ERR_REQUEST;
        }
        /* CHECK succesfull, remove header */
        else {
            (*rcvdLen) -= (RFAL_NFCF_LENGTH_LEN + RFAL_NFCF_CHECKUPDATE_RES_NOB_POS);

            if(*rcvdLen > 0U) {
                ST_MEMMOVE(rxBuf, &checkRes[RFAL_NFCF_CHECKUPDATE_RES_NOB_POS], (*rcvdLen));
            }
        }
    }

    return ret;
}

/*******************************************************************************/
ReturnCode rfalNfcfPollerUpdate(
    const uint8_t* nfcid2,
    const rfalNfcfServBlockListParam* servBlock,
    uint8_t* txBuf,
    uint16_t txBufLen,
    const uint8_t* blockData,
    uint8_t* rxBuf,
    uint16_t rxBufLen) {
    uint8_t i;
    uint16_t msgIt;
    uint16_t rcvdLen;
    uint16_t auxLen;
    const uint8_t* updateRes;
    ReturnCode ret;

    /* Check parameters */
    if((nfcid2 == NULL) || (rxBuf == NULL) || (servBlock == NULL) || (txBuf == NULL) ||
       (servBlock->numBlock == 0U) || (servBlock->numBlock > RFAL_NFCF_UPDATE_REQ_MAX_BLOCK) ||
       (servBlock->numServ == 0U) || (servBlock->numServ > RFAL_NFCF_UPDATE_REQ_MAX_SERV) ||
       (rxBufLen < (RFAL_NFCF_LENGTH_LEN + RFAL_NFCF_UPDATE_RES_MIN_LEN))) {
        return ERR_PARAM;
    }

    /* Calculate required txBuffer lenth */
    auxLen = (uint16_t)( RFAL_NFCF_CMD_LEN + RFAL_NFCF_NFCID2_LEN + ( servBlock->numServ * sizeof(rfalNfcfServ) ) + 
              (servBlock->numBlock * sizeof(rfalNfcfBlockListElem)) + (uint16_t)((uint16_t)servBlock->numBlock * RFAL_NFCF_BLOCK_LEN) );

    /* Check whether the provided buffer is sufficient for this request */
    if(txBufLen < auxLen) {
        return ERR_PARAM;
    }

    msgIt = 0;

    /*******************************************************************************/
    /* Compose UPDATE command/request                                              */

    txBuf[msgIt++] = RFAL_NFCF_CMD_WRITE_WITHOUT_ENCRYPTION; /* Command Code    */

    ST_MEMCPY(&txBuf[msgIt], nfcid2, RFAL_NFCF_NFCID2_LEN); /* NFCID2          */
    msgIt += RFAL_NFCF_NFCID2_LEN;

    txBuf[msgIt++] = servBlock->numServ; /* NoS             */
    for(i = 0; i < servBlock->numServ; i++) {
        txBuf[msgIt++] = (uint8_t)((servBlock->servList[i] >> 0U) & 0xFFU); /* Service Code    */
        txBuf[msgIt++] = (uint8_t)((servBlock->servList[i] >> 8U) & 0xFFU);
    }

    txBuf[msgIt++] = servBlock->numBlock; /* NoB             */
    for(i = 0; i < servBlock->numBlock; i++) {
        txBuf[msgIt++] =
            servBlock->blockList[i].conf; /* Block list element conf (Flag|Access|Service) */
        if((servBlock->blockList[i].conf & 0x80U) !=
           0U) /* Check if 2 or 3 byte block list element       */
        {
            txBuf[msgIt++] =
                (uint8_t)(servBlock->blockList[i].blockNum & 0xFFU); /* 1byte Block Num */
        } else {
            txBuf[msgIt++] =
                (uint8_t)((servBlock->blockList[i].blockNum >> 0U) & 0xFFU); /* 2byte Block Num */
            txBuf[msgIt++] = (uint8_t)((servBlock->blockList[i].blockNum >> 8U) & 0xFFU);
        }
    }

    auxLen = ((uint16_t)servBlock->numBlock * RFAL_NFCF_BLOCK_LEN);
    ST_MEMCPY(&txBuf[msgIt], blockData, auxLen); /* Block Data      */
    msgIt += auxLen;

    /*******************************************************************************/
    /* Transceive UPDATE command/request                                           */
    ret = rfalTransceiveBlockingTxRx(
        txBuf,
        msgIt,
        rxBuf,
        rxBufLen,
        &rcvdLen,
        RFAL_TXRX_FLAGS_DEFAULT,
        RFAL_NFCF_MRT_CHECK_UPDATE);

    if(ret == ERR_NONE) {
        /* Skip LEN byte */
        updateRes = (rxBuf + RFAL_NFCF_LENGTH_LEN);

        /* Check response length */
        if(rcvdLen < (RFAL_NFCF_LENGTH_LEN + RFAL_NFCF_CHECKUPDATE_RES_ST2_POS)) {
            ret = ERR_PROTO;
        }
        /* Check for a valid response */
        else if(
            (updateRes[RFAL_NFCF_CMD_POS] !=
             (uint8_t)RFAL_NFCF_CMD_WRITE_WITHOUT_ENCRYPTION_RES) ||
            (updateRes[RFAL_NFCF_CHECKUPDATE_RES_ST1_POS] != RFAL_NFCF_STATUS_FLAG_SUCCESS) ||
            (updateRes[RFAL_NFCF_CHECKUPDATE_RES_ST2_POS] != RFAL_NFCF_STATUS_FLAG_SUCCESS)) {
            ret = ERR_REQUEST;
        } else {
            /* MISRA 15.7 - Empty else */
        }
    }

    return ret;
}

/*******************************************************************************/
bool rfalNfcfListenerIsT3TReq(const uint8_t* buf, uint16_t bufLen, uint8_t* nfcid2) {
    /* Check cmd byte */
    switch(*buf) {
    case RFAL_NFCF_CMD_READ_WITHOUT_ENCRYPTION:
        if(bufLen < RFAL_NFCF_READ_WO_ENCRYPTION_MIN_LEN) {
            return false;
        }
        break;

    case RFAL_NFCF_CMD_WRITE_WITHOUT_ENCRYPTION:
        if(bufLen < RFAL_NFCF_WRITE_WO_ENCRYPTION_MIN_LEN) {
            return false;
        }
        break;

    default:
        return false;
    }

    /* Output NFID2 if requested */
    if(nfcid2 != NULL) {
        ST_MEMCPY(nfcid2, &buf[RFAL_NFCF_CMD_LEN], RFAL_NFCF_NFCID2_LEN);
    }

    return true;
}

#endif /* RFAL_FEATURE_NFCF */