move some examples to utils/ since they are not examples anymore :) (Fixes Issue 164)
This commit is contained in:
Romuald Conty
parent
311d12feef
commit
8c7b61eaba
34 changed files with 126 additions and 83 deletions
461
utils/nfc-relay-picc.c
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461
utils/nfc-relay-picc.c
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/*-
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* Public platform independent Near Field Communication (NFC) library examples
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*
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* Copyright (C) 2010, Romuald Conty
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2 )Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* Note that this license only applies on the examples, NFC library itself is under LGPL
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*
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*/
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/**
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* @file nfc-relay-picc.c
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* @brief Relay example using two PN532 devices.
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*/
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// Notes & differences with nfc-relay:
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// - This example only works with PN532 because it relies on
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// its internal handling of ISO14443-4 specificities.
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// - Thanks to this internal handling & injection of WTX frames,
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// this example works on readers very strict on timing
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif /* HAVE_CONFIG_H */
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <signal.h>
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#include <unistd.h>
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#include <nfc/nfc.h>
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#include "nfc-utils.h"
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#define MAX_FRAME_LEN 264
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#define MAX_DEVICE_COUNT 2
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static byte_t abtCapdu[MAX_FRAME_LEN];
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static size_t szCapduLen;
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static byte_t abtRapdu[MAX_FRAME_LEN];
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static size_t szRapduLen;
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static nfc_device_t *pndInitiator;
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static nfc_device_t *pndTarget;
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static bool quitting = false;
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static bool quiet_output = false;
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static bool initiator_only_mode = false;
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static bool target_only_mode = false;
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static int waiting_time = 0;
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FILE * fd3;
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FILE * fd4;
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void
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intr_hdlr (void)
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{
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printf ("\nQuitting...\n");
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printf ("Please send a last command to the emulator to quit properly.\n");
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quitting = true;
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return;
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}
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void
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print_usage (char *argv[])
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{
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printf ("Usage: %s [OPTIONS]\n", argv[0]);
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printf ("Options:\n");
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printf ("\t-h\tHelp. Print this message.\n");
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printf ("\t-q\tQuiet mode. Suppress printing of relayed data (improves timing).\n");
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printf ("\t-t\tTarget mode only (the one on reader side). Data expected from FD3 to FD4.\n");
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printf ("\t-i\tInitiator mode only (the one on tag side). Data expected from FD3 to FD4.\n");
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printf ("\t-n N\tAdds a waiting time of N seconds (integer) in the relay to mimic long distance.\n");
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}
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bool print_hex_fd4 (const byte_t * pbtData, const size_t szBytes, const char * pchPrefix)
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{
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size_t szPos;
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if (szBytes > MAX_FRAME_LEN) {
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return EXIT_FAILURE;
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}
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if (fprintf (fd4, "#%s %04zx: ", pchPrefix, szBytes)<0) {
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return EXIT_FAILURE;
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}
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for (szPos = 0; szPos < szBytes; szPos++) {
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if (fprintf (fd4, "%02x ", pbtData[szPos])<0) {
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return EXIT_FAILURE;
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}
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}
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if (fprintf (fd4, "\n")<0) {
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return EXIT_FAILURE;
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}
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fflush(fd4);
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return EXIT_SUCCESS;
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}
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bool scan_hex_fd3 (byte_t *pbtData, size_t *pszBytes, const char * pchPrefix)
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{
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size_t szPos;
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unsigned int uiBytes;
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unsigned int uiData;
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char pchScan[256];
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int c;
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// Look for our next sync marker
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while ( (c=fgetc(fd3)) != '#') {
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if (c == EOF) {
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return EXIT_FAILURE;
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}
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}
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strncpy(pchScan, pchPrefix, 250);
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strcat(pchScan, " %04x:");
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if (fscanf (fd3, pchScan, &uiBytes)<1) {
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return EXIT_FAILURE;
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}
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*pszBytes=uiBytes;
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if (*pszBytes > MAX_FRAME_LEN) {
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return EXIT_FAILURE;
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}
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for (szPos = 0; szPos < *pszBytes; szPos++) {
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if (fscanf (fd3, "%02x", &uiData)<1) {
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return EXIT_FAILURE;
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}
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pbtData[szPos]=uiData;
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}
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return EXIT_SUCCESS;
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}
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int
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main (int argc, char *argv[])
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{
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int arg;
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size_t szFound;
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nfc_device_desc_t *pnddDevices;
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const char *acLibnfcVersion = nfc_version ();
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nfc_target_t ntRealTarget;
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// Get commandline options
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for (arg = 1; arg < argc; arg++) {
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if (0 == strcmp (argv[arg], "-h")) {
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print_usage (argv);
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return EXIT_SUCCESS;
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} else if (0 == strcmp (argv[arg], "-q")) {
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quiet_output = true;
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} else if (0 == strcmp (argv[arg], "-t")) {
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printf ("INFO: %s\n", "Target mode only.");
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initiator_only_mode = false;
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target_only_mode = true;
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} else if (0 == strcmp (argv[arg], "-i")) {
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printf ("INFO: %s\n", "Initiator mode only.");
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initiator_only_mode = true;
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target_only_mode = false;
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} else if (0 == strcmp (argv[arg], "-n")) {
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if (++arg==argc || (sscanf(argv[arg], "%i", &waiting_time)<1)) {
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ERR ("Missing or wrong waiting time value: %s.", argv[arg]);
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print_usage (argv);
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return EXIT_FAILURE;
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}
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printf ("Waiting time: %i secs.\n", waiting_time);
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} else {
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ERR ("%s is not supported option.", argv[arg]);
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print_usage (argv);
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return EXIT_FAILURE;
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}
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}
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// Display libnfc version
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printf ("%s uses libnfc %s\n", argv[0], acLibnfcVersion);
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#ifdef WIN32
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signal (SIGINT, (void (__cdecl *) (int)) intr_hdlr);
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#else
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signal (SIGINT, (void (*)()) intr_hdlr);
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#endif
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// Allocate memory to put the result of available devices listing
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if (!(pnddDevices = malloc (MAX_DEVICE_COUNT * sizeof (*pnddDevices)))) {
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fprintf (stderr, "malloc() failed\n");
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return EXIT_FAILURE;
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}
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// List available devices
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nfc_list_devices (pnddDevices, MAX_DEVICE_COUNT, &szFound);
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if (initiator_only_mode || target_only_mode) {
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if (szFound < 1) {
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ERR ("No device found");
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return EXIT_FAILURE;
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}
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fd3 = fdopen(3, "r");
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fd4 = fdopen(4, "w");
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}
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else {
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if (szFound < 2) {
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ERR ("%zd device found but two connected devices are needed to relay NFC.", szFound);
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return EXIT_FAILURE;
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}
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}
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if (!target_only_mode) {
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// Try to open the NFC reader used as initiator
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// Little hack to allow using initiator no matter if
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// there is already a target used locally or not on the same machine:
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// if there is more than one readers connected we connect to the second reader
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// (we hope they're always detected in the same order)
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if (szFound == 1) {
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pndInitiator = nfc_connect (&(pnddDevices[0]));
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} else {
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pndInitiator = nfc_connect (&(pnddDevices[1]));
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}
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if (!pndInitiator) {
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printf ("Error connecting NFC reader\n");
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exit(EXIT_FAILURE);
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}
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printf ("Connected to the NFC reader device: %s\n", pndInitiator->acName);
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if (!nfc_initiator_init (pndInitiator)) {
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printf ("Error: fail initializing initiator\n");
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nfc_disconnect (pndInitiator);
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exit (EXIT_FAILURE);
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}
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// Try to find a ISO 14443-4A tag
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nfc_modulation_t nm = {
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.nmt = NMT_ISO14443A,
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.nbr = NBR_106,
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};
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if (!nfc_initiator_select_passive_target (pndInitiator, nm, NULL, 0, &ntRealTarget)) {
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printf ("Error: no tag was found\n");
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nfc_disconnect (pndInitiator);
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exit (EXIT_FAILURE);
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}
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printf("Found tag:\n");
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print_nfc_iso14443a_info (ntRealTarget.nti.nai, false);
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if (initiator_only_mode) {
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if (print_hex_fd4(ntRealTarget.nti.nai.abtUid, ntRealTarget.nti.nai.szUidLen, "UID") != EXIT_SUCCESS) {
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fprintf (stderr, "Error while printing UID to FD4\n");
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nfc_disconnect (pndInitiator);
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exit(EXIT_FAILURE);
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}
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if (print_hex_fd4(ntRealTarget.nti.nai.abtAtqa, 2, "ATQA") != EXIT_SUCCESS) {
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fprintf (stderr, "Error while printing ATQA to FD4\n");
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nfc_disconnect (pndInitiator);
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exit(EXIT_FAILURE);
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}
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if (print_hex_fd4(&(ntRealTarget.nti.nai.btSak), 1, "SAK") != EXIT_SUCCESS) {
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fprintf (stderr, "Error while printing SAK to FD4\n");
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nfc_disconnect (pndInitiator);
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exit(EXIT_FAILURE);
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}
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if (print_hex_fd4(ntRealTarget.nti.nai.abtAts, ntRealTarget.nti.nai.szAtsLen, "ATS") != EXIT_SUCCESS) {
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fprintf (stderr, "Error while printing ATS to FD4\n");
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nfc_disconnect (pndInitiator);
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exit(EXIT_FAILURE);
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}
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}
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}
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if (initiator_only_mode) {
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printf ("Hint: tag <---> *INITIATOR* (relay) <-FD3/FD4-> target (relay) <---> original reader\n\n");
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} else if (target_only_mode) {
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printf ("Hint: tag <---> initiator (relay) <-FD3/FD4-> *TARGET* (relay) <---> original reader\n\n");
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} else {
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printf ("Hint: tag <---> initiator (relay) <---> target (relay) <---> original reader\n\n");
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}
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if (!initiator_only_mode) {
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nfc_target_t ntEmulatedTarget = {
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.nm = {
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.nmt = NMT_ISO14443A,
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.nbr = NBR_106,
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},
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};
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if (target_only_mode) {
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size_t foo;
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if (scan_hex_fd3(ntEmulatedTarget.nti.nai.abtUid, &(ntEmulatedTarget.nti.nai.szUidLen), "UID") != EXIT_SUCCESS) {
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fprintf (stderr, "Error while scanning UID from FD3\n");
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nfc_disconnect (pndInitiator);
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exit(EXIT_FAILURE);
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}
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if (scan_hex_fd3(ntEmulatedTarget.nti.nai.abtAtqa, &foo, "ATQA") != EXIT_SUCCESS) {
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fprintf (stderr, "Error while scanning ATQA from FD3\n");
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nfc_disconnect (pndInitiator);
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exit(EXIT_FAILURE);
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}
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if (scan_hex_fd3(&(ntEmulatedTarget.nti.nai.btSak), &foo, "SAK") != EXIT_SUCCESS) {
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fprintf (stderr, "Error while scanning SAK from FD3\n");
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nfc_disconnect (pndInitiator);
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exit(EXIT_FAILURE);
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}
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if (scan_hex_fd3(ntEmulatedTarget.nti.nai.abtAts, &(ntEmulatedTarget.nti.nai.szAtsLen), "ATS") != EXIT_SUCCESS) {
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fprintf (stderr, "Error while scanning ATS from FD3\n");
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nfc_disconnect (pndInitiator);
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exit(EXIT_FAILURE);
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}
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} else {
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ntEmulatedTarget.nti = ntRealTarget.nti;
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}
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// We can only emulate a short UID, so fix length & ATQA bit:
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ntEmulatedTarget.nti.nai.szUidLen = 4;
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ntEmulatedTarget.nti.nai.abtAtqa[1] &= (0xFF-0x40);
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// First byte of UID is always automatically replaced by 0x08 in this mode anyway
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ntEmulatedTarget.nti.nai.abtUid[0] = 0x08;
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// ATS is always automatically replaced by PN532, we've no control on it:
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// ATS = (05) 75 33 92 03
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// (TL) T0 TA TB TC
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// | | | +-- CID supported, NAD supported
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// | | +----- FWI=9 SFGI=2 => FWT=154ms, SFGT=1.21ms
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// | +-------- DR=2,4 DS=2,4 => supports 106, 212 & 424bps in both directions
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// +----------- TA,TB,TC, FSCI=5 => FSC=64
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// It seems hazardous to tell we support NAD if the tag doesn't support NAD but I don't know how to disable it
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// PC/SC pseudo-ATR = 3B 80 80 01 01 if there is no historical bytes
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// Creates ATS and copy max 48 bytes of Tk:
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byte_t * pbtTk;
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size_t szTk;
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pbtTk = iso14443a_locate_historical_bytes (ntEmulatedTarget.nti.nai.abtAts, ntEmulatedTarget.nti.nai.szAtsLen, &szTk);
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szTk = (szTk > 48) ? 48 : szTk;
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byte_t pbtTkt[48];
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memcpy(pbtTkt, pbtTk, szTk);
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ntEmulatedTarget.nti.nai.abtAts[0] = 0x75;
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ntEmulatedTarget.nti.nai.abtAts[1] = 0x33;
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ntEmulatedTarget.nti.nai.abtAts[2] = 0x92;
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ntEmulatedTarget.nti.nai.abtAts[3] = 0x03;
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ntEmulatedTarget.nti.nai.szAtsLen = 4 + szTk;
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memcpy(&(ntEmulatedTarget.nti.nai.abtAts[4]), pbtTkt, szTk);
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printf("We will emulate:\n");
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print_nfc_iso14443a_info (ntEmulatedTarget.nti.nai, false);
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// Try to open the NFC emulator device
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pndTarget = nfc_connect (&(pnddDevices[0]));
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if (pndTarget == NULL) {
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printf ("Error connecting NFC emulator device\n");
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if (!target_only_mode) {
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nfc_disconnect (pndInitiator);
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}
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return EXIT_FAILURE;
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}
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printf ("Connected to the NFC emulator device: %s\n", pndTarget->acName);
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if (!nfc_target_init (pndTarget, &ntEmulatedTarget, abtCapdu, &szCapduLen)) {
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ERR ("%s", "Initialization of NFC emulator failed");
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if (!target_only_mode) {
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nfc_disconnect (pndInitiator);
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}
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nfc_disconnect (pndTarget);
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exit(EXIT_FAILURE);
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}
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printf ("%s\n", "Done, relaying frames now!");
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}
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while (!quitting) {
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bool ret;
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if (!initiator_only_mode) {
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// Receive external reader command through target
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if (!nfc_target_receive_bytes(pndTarget,abtCapdu,&szCapduLen, NULL)) {
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nfc_perror (pndTarget, "nfc_target_receive_bytes");
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if (!target_only_mode) {
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nfc_disconnect (pndInitiator);
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}
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nfc_disconnect (pndTarget);
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exit(EXIT_FAILURE);
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}
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if (target_only_mode) {
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if (print_hex_fd4(abtCapdu, szCapduLen, "C-APDU") != EXIT_SUCCESS) {
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fprintf (stderr, "Error while printing C-APDU to FD4\n");
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nfc_disconnect (pndTarget);
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exit(EXIT_FAILURE);
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}
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}
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} else {
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if (scan_hex_fd3(abtCapdu, &szCapduLen, "C-APDU") != EXIT_SUCCESS) {
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fprintf (stderr, "Error while scanning C-APDU from FD3\n");
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nfc_disconnect (pndInitiator);
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exit(EXIT_FAILURE);
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}
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}
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// Show transmitted response
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if (!quiet_output) {
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printf ("Forwarding C-APDU: ");
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print_hex (abtCapdu, szCapduLen);
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}
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if (!target_only_mode) {
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// Forward the frame to the original tag
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ret = nfc_initiator_transceive_bytes
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(pndInitiator, abtCapdu, szCapduLen, abtRapdu, &szRapduLen, NULL);
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} else {
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if (scan_hex_fd3(abtRapdu, &szRapduLen, "R-APDU") != EXIT_SUCCESS) {
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fprintf (stderr, "Error while scanning R-APDU from FD3\n");
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nfc_disconnect (pndTarget);
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exit(EXIT_FAILURE);
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}
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ret = true;
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}
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if (ret) {
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// Redirect the answer back to the external reader
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if (waiting_time > 0) {
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if (!quiet_output) {
|
||||
printf ("Waiting %is to simulate longer relay...\n", waiting_time);
|
||||
}
|
||||
sleep(waiting_time);
|
||||
}
|
||||
// Show transmitted response
|
||||
if (!quiet_output) {
|
||||
printf ("Forwarding R-APDU: ");
|
||||
print_hex (abtRapdu, szRapduLen);
|
||||
}
|
||||
if (!initiator_only_mode) {
|
||||
// Transmit the response bytes
|
||||
if (!nfc_target_send_bytes(pndTarget, abtRapdu, szRapduLen, NULL)) {
|
||||
nfc_perror (pndTarget, "nfc_target_send_bytes");
|
||||
if (!target_only_mode) {
|
||||
nfc_disconnect (pndInitiator);
|
||||
}
|
||||
if (!initiator_only_mode) {
|
||||
nfc_disconnect (pndTarget);
|
||||
}
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
} else {
|
||||
if (print_hex_fd4(abtRapdu, szRapduLen, "R-APDU") != EXIT_SUCCESS) {
|
||||
fprintf (stderr, "Error while printing R-APDU to FD4\n");
|
||||
nfc_disconnect (pndInitiator);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (!target_only_mode) {
|
||||
nfc_disconnect (pndInitiator);
|
||||
}
|
||||
if (!initiator_only_mode) {
|
||||
nfc_disconnect (pndTarget);
|
||||
}
|
||||
exit (EXIT_SUCCESS);
|
||||
}
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue