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- /*-
- * Public platform independent Near Field Communication (NFC) library examples
- *
- * Copyright (C) 2009, Roel Verdult
- * Copyright (C) 2010, Romuald Conty, Romain Tartière
- *
- * 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 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.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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.
- *
- * Note that this license only applies on the examples, NFC library itself is under LGPL
- *
- */
- #include "mifare.h"
- #include <string.h>
- #include <nfc/nfc.h>
- /**
- * @brief Execute a MIFARE Classic Command
- * @return Returns true if action was successfully performed; otherwise returns false.
- * @param pmp Some commands need additional information. This information should be supplied in the mifare_param union.
- *
- * The specified MIFARE command will be executed on the tag. There are different commands possible, they all require the destination block number.
- * @note There are three different types of information (Authenticate, Data and Value).
- *
- * First an authentication must take place using Key A or B. It requires a 48 bit Key (6 bytes) and the UID.
- * They are both used to initialize the internal cipher-state of the PN53X chip (http://libnfc.org/hardware/pn53x-chip).
- * After a successful authentication it will be possible to execute other commands (e.g. Read/Write).
- * The MIFARE Classic Specification (http://www.nxp.com/acrobat/other/identification/M001053_MF1ICS50_rev5_3.pdf) explains more about this process.
- */
- bool
- nfc_initiator_mifare_cmd (nfc_device * pnd, const mifare_cmd mc, const uint8_t ui8Block, mifare_param * pmp)
- {
- uint8_t abtRx[265];
- size_t szRx = sizeof(abtRx);
- size_t szParamLen;
- uint8_t abtCmd[265];
- //bool bEasyFraming;
- abtCmd[0] = mc; // The MIFARE Classic command
- abtCmd[1] = ui8Block; // The block address (1K=0x00..0x39, 4K=0x00..0xff)
- switch (mc) {
- // Read and store command have no parameter
- case MC_READ:
- case MC_STORE:
- szParamLen = 0;
- break;
- // Authenticate command
- case MC_AUTH_A:
- case MC_AUTH_B:
- szParamLen = sizeof (mifare_param_auth);
- break;
- // Data command
- case MC_WRITE:
- szParamLen = sizeof (mifare_param_data);
- break;
- // Value command
- case MC_DECREMENT:
- case MC_INCREMENT:
- case MC_TRANSFER:
- szParamLen = sizeof (mifare_param_value);
- break;
- // Please fix your code, you never should reach this statement
- default:
- return false;
- break;
- }
- // When available, copy the parameter bytes
- if (szParamLen)
- memcpy (abtCmd + 2, (uint8_t *) pmp, szParamLen);
- // FIXME: Save and restore bEasyFraming
- // bEasyFraming = nfc_device_get_property_bool (pnd, NP_EASY_FRAMING, &bEasyFraming);
- if (nfc_device_set_property_bool (pnd, NP_EASY_FRAMING, true) < 0) {
- nfc_perror (pnd, "nfc_device_set_property_bool");
- return false;
- }
- // Fire the mifare command
- int res;
- if ((res = nfc_initiator_transceive_bytes (pnd, abtCmd, 2 + szParamLen, abtRx, &szRx, -1)) < 0) {
- if (res == NFC_ERFTRANS) {
- // "Invalid received frame", usual means we are
- // authenticated on a sector but the requested MIFARE cmd (read, write)
- // is not permitted by current acces bytes;
- // So there is nothing to do here.
- }
- else if(res == NFC_ECHIP) {
- // Since we implement a dictionary brute force attack,
- // don't print an error on failed authentications.
- }
- else {
- nfc_perror (pnd, "nfc_initiator_transceive_bytes");
- }
- // XXX nfc_device_set_property_bool (pnd, NP_EASY_FRAMING, bEasyFraming);
- return false;
- }
- /* XXX
- if (nfc_device_set_property_bool (pnd, NP_EASY_FRAMING, bEasyFraming) < 0) {
- nfc_perror (pnd, "nfc_device_set_property_bool");
- return false;
- }
- */
- // When we have executed a read command, copy the received bytes into the param
- if (mc == MC_READ) {
- if (szRx == 16) {
- memcpy (pmp->mpd.abtData, abtRx, 16);
- } else {
- return false;
- }
- }
- // Command succesfully executed
- return true;
- }
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