[proxmark3-svn] / client / cmdhf14b.c

//-----------------------------------------------------------------------------
// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// High frequency ISO14443B commands
//-----------------------------------------------------------------------------

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <stdint.h>
#include "iso14443crc.h"
//#include "proxusb.h"
#include "proxmark3.h"
#include "data.h"
#include "graph.h"
#include "ui.h"
#include "cmdparser.h"
#include "cmdhf14b.h"
#include "cmdmain.h"

static int CmdHelp(const char *Cmd);

int CmdHF14BDemod(const char *Cmd)
{
  int i, j, iold;
  int isum, qsum;
  int outOfWeakAt;
  bool negateI, negateQ;

  uint8_t data[256];
  int dataLen = 0;

  // As received, the samples are pairs, correlations against I and Q
  // square waves. So estimate angle of initial carrier (or just
  // quadrant, actually), and then do the demod.

  // First, estimate where the tag starts modulating.
  for (i = 0; i < GraphTraceLen; i += 2) {
    if (abs(GraphBuffer[i]) + abs(GraphBuffer[i + 1]) > 40) {
      break;
    }
  }
  if (i >= GraphTraceLen) {
    PrintAndLog("too weak to sync");
    return 0;
  }
  PrintAndLog("out of weak at %d", i);
  outOfWeakAt = i;

  // Now, estimate the phase in the initial modulation of the tag
  isum = 0;
  qsum = 0;
  for (; i < (outOfWeakAt + 16); i += 2) {
    isum += GraphBuffer[i + 0];
    qsum += GraphBuffer[i + 1];
  }
  negateI = (isum < 0);
  negateQ = (qsum < 0);

  // Turn the correlation pairs into soft decisions on the bit.
  j = 0;
  for (i = 0; i < GraphTraceLen / 2; i++) {
    int si = GraphBuffer[j];
    int sq = GraphBuffer[j + 1];
    if (negateI) si = -si;
    if (negateQ) sq = -sq;
    GraphBuffer[i] = si + sq;
    j += 2;
  }
  GraphTraceLen = i;

  i = outOfWeakAt / 2;
  while (GraphBuffer[i] > 0 && i < GraphTraceLen)
    i++;
  if (i >= GraphTraceLen) goto demodError;

  iold = i;
  while (GraphBuffer[i] < 0 && i < GraphTraceLen)
    i++;
  if (i >= GraphTraceLen) goto demodError;
  if ((i - iold) > 23) goto demodError;

  PrintAndLog("make it to demod loop");

  for (;;) {
    iold = i;
    while (GraphBuffer[i] >= 0 && i < GraphTraceLen)
      i++;
    if (i >= GraphTraceLen) goto demodError;
    if ((i - iold) > 6) goto demodError;

    uint16_t shiftReg = 0;
    if (i + 20 >= GraphTraceLen) goto demodError;

    for (j = 0; j < 10; j++) {
      int soft = GraphBuffer[i] + GraphBuffer[i + 1];

      if (abs(soft) < (abs(isum) + abs(qsum)) / 20) {
        PrintAndLog("weak bit");
      }

      shiftReg >>= 1;
      if(GraphBuffer[i] + GraphBuffer[i+1] >= 0) {
        shiftReg |= 0x200;
      }

      i+= 2;
    }

    if ((shiftReg & 0x200) && !(shiftReg & 0x001))
    {
      // valid data byte, start and stop bits okay
      PrintAndLog("   %02x", (shiftReg >> 1) & 0xff);
      data[dataLen++] = (shiftReg >> 1) & 0xff;
      if (dataLen >= sizeof(data)) {
        return 0;
      }
    } else if (shiftReg == 0x000) {
      // this is EOF
      break;
    } else {
      goto demodError;
    }
  }

  uint8_t first, second;
  ComputeCrc14443(CRC_14443_B, data, dataLen-2, &first, &second);
  PrintAndLog("CRC: %02x %02x (%s)\n", first, second,
    (first == data[dataLen-2] && second == data[dataLen-1]) ?
      "ok" : "****FAIL****");

  RepaintGraphWindow();
  return 0;

demodError:
  PrintAndLog("demod error");
  RepaintGraphWindow();
  return 0;
}

int CmdHF14BList(const char *Cmd)
{
  uint8_t got[960];
  GetFromBigBuf(got,sizeof(got),0);
  WaitForResponse(CMD_ACK,NULL);

  PrintAndLog("recorded activity:");
  PrintAndLog(" time  :rssi: who bytes");
  PrintAndLog("---------+----+----+-----------");

  int i = 0;
  int prev = -1;

  for(;;) {
    if(i >= 900) {
      break;
    }

    bool isResponse;
    int timestamp = *((uint32_t *)(got+i));
    if(timestamp & 0x80000000) {
      timestamp &= 0x7fffffff;
      isResponse = 1;
    } else {
      isResponse = 0;
    }
    int metric = *((uint32_t *)(got+i+4));

    int len = got[i+8];

    if(len > 100) {
      break;
    }
    if(i + len >= 900) {
      break;
    }

    uint8_t *frame = (got+i+9);

    char line[1000] = "";
    int j;
    for(j = 0; j < len; j++) {
      sprintf(line+(j*3), "%02x  ", frame[j]);
    }

    char *crc;
    if(len > 2) {
      uint8_t b1, b2;
      ComputeCrc14443(CRC_14443_B, frame, len-2, &b1, &b2);
      if(b1 != frame[len-2] || b2 != frame[len-1]) {
        crc = "**FAIL CRC**";
      } else {
        crc = "";
      }
    } else {
      crc = "(SHORT)";
    }

    char metricString[100];
    if(isResponse) {
      sprintf(metricString, "%3d", metric);
    } else {
      strcpy(metricString, "   ");
    }

    PrintAndLog(" +%7d: %s: %s %s %s",
      (prev < 0 ? 0 : timestamp - prev),
      metricString,
      (isResponse ? "TAG" : "   "), line, crc);

    prev = timestamp;
    i += (len + 9);
  }
  return 0;
}

int CmdHF14BRead(const char *Cmd)
{
  UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_14443, {strtol(Cmd, NULL, 0), 0, 0}};
  SendCommand(&c);
  return 0;
}

int CmdHF14Sim(const char *Cmd)
{
  UsbCommand c={CMD_SIMULATE_TAG_ISO_14443};
  SendCommand(&c);
  return 0;
}

int CmdHFSimlisten(const char *Cmd)
{
  UsbCommand c = {CMD_SIMULATE_TAG_HF_LISTEN};
  SendCommand(&c);
  return 0;
}

int CmdHF14BSnoop(const char *Cmd)
{
  UsbCommand c = {CMD_SNOOP_ISO_14443};
  SendCommand(&c);
  return 0;
}

/* New command to read the contents of a SRI512 tag
 * SRI512 tags are ISO14443-B modulated memory tags,
 * this command just dumps the contents of the memory
 */
int CmdSri512Read(const char *Cmd)
{
  UsbCommand c = {CMD_READ_SRI512_TAG, {strtol(Cmd, NULL, 0), 0, 0}};
  SendCommand(&c);
  return 0;
}

/* New command to read the contents of a SRIX4K tag
 * SRIX4K tags are ISO14443-B modulated memory tags,
 * this command just dumps the contents of the memory/
 */
int CmdSrix4kRead(const char *Cmd)
{
  UsbCommand c = {CMD_READ_SRIX4K_TAG, {strtol(Cmd, NULL, 0), 0, 0}};
  SendCommand(&c);
  return 0;
}

int CmdHF14BCmdRaw (const char *cmd) {
    UsbCommand resp;
    uint8_t *recv;
    UsbCommand c = {CMD_ISO_14443B_COMMAND, {0, 0, 0}}; // len,recv?
    uint8_t reply=1;
    uint8_t crc=0;
    uint8_t power=0;
    char buf[5]="";
    int i=0;
    uint8_t data[100];
    unsigned int datalen=0, temp;
    char *hexout;
    
    if (strlen(cmd)<3) {
        PrintAndLog("Usage: hf 14b raw [-r] [-c] [-p] <0A 0B 0C ... hex>");
        PrintAndLog("       -r    do not read response");
        PrintAndLog("       -c    calculate and append CRC");
        PrintAndLog("       -p    leave the field on after receive");
        return 0;    
    }

    // strip
    while (*cmd==' ' || *cmd=='\t') cmd++;
    
    while (cmd[i]!='\0') {
        if (cmd[i]==' ' || cmd[i]=='\t') { i++; continue; }
        if (cmd[i]=='-') {
            switch (cmd[i+1]) {
                case 'r': 
                case 'R': 
                    reply=0;
                    break;
                case 'c':
                case 'C':                
                    crc=1;
                    break;
                case 'p': 
                case 'P': 
                    power=1;
                    break;
                default:
                    PrintAndLog("Invalid option");
                    return 0;
            }
            i+=2;
            continue;
        }
        if ((cmd[i]>='0' && cmd[i]<='9') ||
            (cmd[i]>='a' && cmd[i]<='f') ||
            (cmd[i]>='A' && cmd[i]<='F') ) {
            buf[strlen(buf)+1]=0;
            buf[strlen(buf)]=cmd[i];
            i++;
            
            if (strlen(buf)>=2) {
                sscanf(buf,"%x",&temp);
                data[datalen]=(uint8_t)(temp & 0xff);
                datalen++;
                *buf=0;
            }
            continue;
        }
        PrintAndLog("Invalid char on input");
        return 0;
    }
    if(crc)
    {
        uint8_t first, second;
        ComputeCrc14443(CRC_14443_B, data, datalen, &first, &second);
        data[datalen++] = first;
        data[datalen++] = second;
    }
    
    c.arg[0] = datalen;
    c.arg[1] = reply;
    c.arg[2] = power;
    memcpy(c.d.asBytes,data,datalen);
    
    SendCommand(&c);
    
    if (reply) {
        if (WaitForResponseTimeout(CMD_ACK,&resp,1000)) {
            recv = resp.d.asBytes;
            PrintAndLog("received %i octets",resp.arg[0]);
            if(!resp.arg[0])
                return 0;
            hexout = (char *)malloc(resp.arg[0] * 3 + 1);
            if (hexout != NULL) {
                uint8_t first, second;
                for (int i = 0; i < resp.arg[0]; i++) { // data in hex
                    sprintf(&hexout[i * 3], "%02hX ", recv[i]);
                }
                PrintAndLog("%s", hexout);
                free(hexout);
                ComputeCrc14443(CRC_14443_B, recv, resp.arg[0]-2, &first, &second);
                if(recv[resp.arg[0]-2]==first && recv[resp.arg[0]-1]==second) {
                    PrintAndLog("CRC OK");
                } else {
                    PrintAndLog("CRC failed");
                }
            } else {
                PrintAndLog("malloc failed your client has low memory?");
            }
        } else {
            PrintAndLog("timeout while waiting for reply.");
        }
    } // if reply
    return 0;
}

static command_t CommandTable[] = 
{
  {"help",        CmdHelp,        1, "This help"},
  {"demod",       CmdHF14BDemod,  1, "Demodulate ISO14443 Type B from tag"},
  {"list",        CmdHF14BList,   0, "List ISO 14443 history"},
  {"read",        CmdHF14BRead,   0, "Read HF tag (ISO 14443)"},
  {"sim",         CmdHF14Sim,     0, "Fake ISO 14443 tag"},
  {"simlisten",   CmdHFSimlisten, 0, "Get HF samples as fake tag"},
  {"snoop",       CmdHF14BSnoop,  0, "Eavesdrop ISO 14443"},
  {"sri512read",  CmdSri512Read,  0, "Read contents of a SRI512 tag"},
  {"srix4kread",  CmdSrix4kRead,  0, "Read contents of a SRIX4K tag"},
  {"raw",         CmdHF14BCmdRaw, 0, "Send raw hex data to tag"},
  {NULL, NULL, 0, NULL}
};

int CmdHF14B(const char *Cmd)
{
  CmdsParse(CommandTable, Cmd);
  return 0;
}

int CmdHelp(const char *Cmd)
{
  CmdsHelp(CommandTable);
  return 0;
}
Commit	Line	Data
a553f267	1	//-----------------------------------------------------------------------------
	2	// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
	3	//
	4	// This code is licensed to you under the terms of the GNU GPL, version 2 or,
	5	// at your option, any later version. See the LICENSE.txt file for the text of
	6	// the license.
	7	//-----------------------------------------------------------------------------
	8	// High frequency ISO14443B commands
	9	//-----------------------------------------------------------------------------
	10
7fe9b0b7	11	#include <stdio.h>
	12	#include <stdlib.h>
	13	#include <stdbool.h>
	14	#include <string.h>
	15	#include <stdint.h>
	16	#include "iso14443crc.h"
28fdb04f	17	//#include "proxusb.h"
902cb3c0	18	#include "proxmark3.h"
7fe9b0b7	19	#include "data.h"
	20	#include "graph.h"
	21	#include "ui.h"
	22	#include "cmdparser.h"
	23	#include "cmdhf14b.h"
7cf3ef20	24	#include "cmdmain.h"
7fe9b0b7	25
	26	static int CmdHelp(const char *Cmd);
	27
	28	int CmdHF14BDemod(const char *Cmd)
	29	{
	30	int i, j, iold;
	31	int isum, qsum;
	32	int outOfWeakAt;
	33	bool negateI, negateQ;
	34
	35	uint8_t data[256];
	36	int dataLen = 0;
	37
	38	// As received, the samples are pairs, correlations against I and Q
	39	// square waves. So estimate angle of initial carrier (or just
	40	// quadrant, actually), and then do the demod.
	41
	42	// First, estimate where the tag starts modulating.
	43	for (i = 0; i < GraphTraceLen; i += 2) {
	44	if (abs(GraphBuffer[i]) + abs(GraphBuffer[i + 1]) > 40) {
	45	break;
	46	}
	47	}
	48	if (i >= GraphTraceLen) {
	49	PrintAndLog("too weak to sync");
	50	return 0;
	51	}
	52	PrintAndLog("out of weak at %d", i);
	53	outOfWeakAt = i;
	54
	55	// Now, estimate the phase in the initial modulation of the tag
	56	isum = 0;
	57	qsum = 0;
	58	for (; i < (outOfWeakAt + 16); i += 2) {
	59	isum += GraphBuffer[i + 0];
	60	qsum += GraphBuffer[i + 1];
	61	}
	62	negateI = (isum < 0);
	63	negateQ = (qsum < 0);
	64
	65	// Turn the correlation pairs into soft decisions on the bit.
	66	j = 0;
	67	for (i = 0; i < GraphTraceLen / 2; i++) {
	68	int si = GraphBuffer[j];
	69	int sq = GraphBuffer[j + 1];
	70	if (negateI) si = -si;
	71	if (negateQ) sq = -sq;
	72	GraphBuffer[i] = si + sq;
	73	j += 2;
	74	}
	75	GraphTraceLen = i;
	76
	77	i = outOfWeakAt / 2;
	78	while (GraphBuffer[i] > 0 && i < GraphTraceLen)
	79	i++;
	80	if (i >= GraphTraceLen) goto demodError;
	81
	82	iold = i;
	83	while (GraphBuffer[i] < 0 && i < GraphTraceLen)
	84	i++;
	85	if (i >= GraphTraceLen) goto demodError;
	86	if ((i - iold) > 23) goto demodError;
	87
	88	PrintAndLog("make it to demod loop");
89
90	for (;;) {
91	iold = i;
92	while (GraphBuffer[i] >= 0 && i < GraphTraceLen)
93	i++;
94	if (i >= GraphTraceLen) goto demodError;
95	if ((i - iold) > 6) goto demodError;
96
97	uint16_t shiftReg = 0;
98	if (i + 20 >= GraphTraceLen) goto demodError;
99
100	for (j = 0; j < 10; j++) {
101	int soft = GraphBuffer[i] + GraphBuffer[i + 1];
102
103	if (abs(soft) < (abs(isum) + abs(qsum)) / 20) {
104	PrintAndLog("weak bit");
105	}
106
107	shiftReg >>= 1;
108	if(GraphBuffer[i] + GraphBuffer[i+1] >= 0) {
109	shiftReg \|= 0x200;
110	}
111
112	i+= 2;
113	}
114
115	if ((shiftReg & 0x200) && !(shiftReg & 0x001))
116	{
117	// valid data byte, start and stop bits okay
118	PrintAndLog(" %02x", (shiftReg >> 1) & 0xff);
119	data[dataLen++] = (shiftReg >> 1) & 0xff;
120	if (dataLen >= sizeof(data)) {
121	return 0;
122	}
123	} else if (shiftReg == 0x000) {
124	// this is EOF
125	break;
126	} else {
127	goto demodError;
128	}
129	}
130
131	uint8_t first, second;
132	ComputeCrc14443(CRC_14443_B, data, dataLen-2, &first, &second);
133	PrintAndLog("CRC: %02x %02x (%s)\n", first, second,
134	(first == data[dataLen-2] && second == data[dataLen-1]) ?
135	"ok" : "**FAIL**");
136
137	RepaintGraphWindow();
138	return 0;
139
140	demodError:
141	PrintAndLog("demod error");
142	RepaintGraphWindow();
143	return 0;
144	}
145
146	int CmdHF14BList(const char *Cmd)
147	{
148	uint8_t got[960];
db09cb3a	149	GetFromBigBuf(got,sizeof(got),0);
869cabf7	150	WaitForResponse(CMD_ACK,NULL);
7fe9b0b7	151
	152	PrintAndLog("recorded activity:");
	153	PrintAndLog(" time :rssi: who bytes");
	154	PrintAndLog("---------+----+----+-----------");
	155
	156	int i = 0;
	157	int prev = -1;
	158
	159	for(;;) {
	160	if(i >= 900) {
	161	break;
	162	}
	163
	164	bool isResponse;
	165	int timestamp = ((uint32_t )(got+i));
	166	if(timestamp & 0x80000000) {
	167	timestamp &= 0x7fffffff;
	168	isResponse = 1;
	169	} else {
	170	isResponse = 0;
	171	}
	172	int metric = ((uint32_t )(got+i+4));
	173
	174	int len = got[i+8];
	175
	176	if(len > 100) {
	177	break;
	178	}
	179	if(i + len >= 900) {
	180	break;
	181	}
	182
	183	uint8_t *frame = (got+i+9);
	184
	185	char line[1000] = "";
	186	int j;
	187	for(j = 0; j < len; j++) {
	188	sprintf(line+(j*3), "%02x ", frame[j]);
	189	}
	190
	191	char *crc;
	192	if(len > 2) {
	193	uint8_t b1, b2;
	194	ComputeCrc14443(CRC_14443_B, frame, len-2, &b1, &b2);
	195	if(b1 != frame[len-2] \|\| b2 != frame[len-1]) {
	196	crc = "FAIL CRC";
	197	} else {
	198	crc = "";
	199	}
	200	} else {
	201	crc = "(SHORT)";
	202	}
	203
	204	char metricString[100];
	205	if(isResponse) {
	206	sprintf(metricString, "%3d", metric);
	207	} else {
	208	strcpy(metricString, " ");
	209	}
	210
	211	PrintAndLog(" +%7d: %s: %s %s %s",
	212	(prev < 0 ? 0 : timestamp - prev),
	213	metricString,
	214	(isResponse ? "TAG" : " "), line, crc);
215
216	prev = timestamp;
217	i += (len + 9);
218	}
219	return 0;
220	}
221
222	int CmdHF14BRead(const char *Cmd)
223	{
224	UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_14443, {strtol(Cmd, NULL, 0), 0, 0}};
225	SendCommand(&c);
226	return 0;
227	}
228
229	int CmdHF14Sim(const char *Cmd)
230	{
231	UsbCommand c={CMD_SIMULATE_TAG_ISO_14443};
232	SendCommand(&c);
233	return 0;
234	}
235
236	int CmdHFSimlisten(const char *Cmd)
237	{
238	UsbCommand c = {CMD_SIMULATE_TAG_HF_LISTEN};
239	SendCommand(&c);
240	return 0;
241	}
242
243	int CmdHF14BSnoop(const char *Cmd)
244	{
245	UsbCommand c = {CMD_SNOOP_ISO_14443};
246	SendCommand(&c);
247	return 0;
248	}
249
250	/* New command to read the contents of a SRI512 tag
251	* SRI512 tags are ISO14443-B modulated memory tags,
252	* this command just dumps the contents of the memory
253	*/
254	int CmdSri512Read(const char *Cmd)
255	{
256	UsbCommand c = {CMD_READ_SRI512_TAG, {strtol(Cmd, NULL, 0), 0, 0}};
257	SendCommand(&c);
258	return 0;
259	}
260
261	/* New command to read the contents of a SRIX4K tag
262	* SRIX4K tags are ISO14443-B modulated memory tags,
263	* this command just dumps the contents of the memory/
264	*/
265	int CmdSrix4kRead(const char *Cmd)
266	{
267	UsbCommand c = {CMD_READ_SRIX4K_TAG, {strtol(Cmd, NULL, 0), 0, 0}};
268	SendCommand(&c);
269	return 0;
270	}
271
7cf3ef20	272	int CmdHF14BCmdRaw (const char *cmd) {
	273	UsbCommand resp;
	274	uint8_t *recv;
	275	UsbCommand c = {CMD_ISO_14443B_COMMAND, {0, 0, 0}}; // len,recv?
	276	uint8_t reply=1;
	277	uint8_t crc=0;
	278	uint8_t power=0;
	279	char buf[5]="";
	280	int i=0;
	281	uint8_t data[100];
	282	unsigned int datalen=0, temp;
	283	char *hexout;
	284
	285	if (strlen(cmd)<3) {
	286	PrintAndLog("Usage: hf 14b raw [-r] [-c] [-p] <0A 0B 0C ... hex>");
	287	PrintAndLog(" -r do not read response");
	288	PrintAndLog(" -c calculate and append CRC");
	289	PrintAndLog(" -p leave the field on after receive");
	290	return 0;
	291	}
	292
	293	// strip
	294	while (cmd==' ' \|\| cmd=='\t') cmd++;
	295
	296	while (cmd[i]!='\0') {
	297	if (cmd[i]==' ' \|\| cmd[i]=='\t') { i++; continue; }
	298	if (cmd[i]=='-') {
	299	switch (cmd[i+1]) {
	300	case 'r':
	301	case 'R':
	302	reply=0;
	303	break;
	304	case 'c':
	305	case 'C':
	306	crc=1;
	307	break;
	308	case 'p':
	309	case 'P':
	310	power=1;
	311	break;
	312	default:
	313	PrintAndLog("Invalid option");
	314	return 0;
	315	}
	316	i+=2;
	317	continue;
	318	}
	319	if ((cmd[i]>='0' && cmd[i]<='9') \|\|
	320	(cmd[i]>='a' && cmd[i]<='f') \|\|
	321	(cmd[i]>='A' && cmd[i]<='F') ) {
	322	buf[strlen(buf)+1]=0;
	323	buf[strlen(buf)]=cmd[i];
	324	i++;
	325
	326	if (strlen(buf)>=2) {
	327	sscanf(buf,"%x",&temp);
	328	data[datalen]=(uint8_t)(temp & 0xff);
	329	datalen++;
	330	*buf=0;
	331	}
	332	continue;
	333	}
	334	PrintAndLog("Invalid char on input");
	335	return 0;
336	}
337	if(crc)
338	{
339	uint8_t first, second;
340	ComputeCrc14443(CRC_14443_B, data, datalen, &first, &second);
341	data[datalen++] = first;
342	data[datalen++] = second;
343	}
344
345	c.arg[0] = datalen;
346	c.arg[1] = reply;
347	c.arg[2] = power;
348	memcpy(c.d.asBytes,data,datalen);
349
350	SendCommand(&c);
351
352	if (reply) {
353	if (WaitForResponseTimeout(CMD_ACK,&resp,1000)) {
354	recv = resp.d.asBytes;
355	PrintAndLog("received %i octets",resp.arg[0]);
356	if(!resp.arg[0])
357	return 0;
358	hexout = (char )malloc(resp.arg[0] 3 + 1);
359	if (hexout != NULL) {
360	uint8_t first, second;
361	for (int i = 0; i < resp.arg[0]; i++) { // data in hex
362	sprintf(&hexout[i * 3], "%02hX ", recv[i]);
363	}
364	PrintAndLog("%s", hexout);
365	free(hexout);
366	ComputeCrc14443(CRC_14443_B, recv, resp.arg[0]-2, &first, &second);
367	if(recv[resp.arg[0]-2]==first && recv[resp.arg[0]-1]==second) {
368	PrintAndLog("CRC OK");
369	} else {
370	PrintAndLog("CRC failed");
371	}
372	} else {
373	PrintAndLog("malloc failed your client has low memory?");
374	}
375	} else {
376	PrintAndLog("timeout while waiting for reply.");
377	}
378	} // if reply
379	return 0;
380	}
381
7fe9b0b7	382	static command_t CommandTable[] =
	383	{
	384	{"help", CmdHelp, 1, "This help"},
	385	{"demod", CmdHF14BDemod, 1, "Demodulate ISO14443 Type B from tag"},
	386	{"list", CmdHF14BList, 0, "List ISO 14443 history"},
	387	{"read", CmdHF14BRead, 0, "Read HF tag (ISO 14443)"},
	388	{"sim", CmdHF14Sim, 0, "Fake ISO 14443 tag"},
	389	{"simlisten", CmdHFSimlisten, 0, "Get HF samples as fake tag"},
	390	{"snoop", CmdHF14BSnoop, 0, "Eavesdrop ISO 14443"},
7cf3ef20	391	{"sri512read", CmdSri512Read, 0, "Read contents of a SRI512 tag"},
	392	{"srix4kread", CmdSrix4kRead, 0, "Read contents of a SRIX4K tag"},
	393	{"raw", CmdHF14BCmdRaw, 0, "Send raw hex data to tag"},
7fe9b0b7	394	{NULL, NULL, 0, NULL}
	395	};
	396
	397	int CmdHF14B(const char *Cmd)
	398	{
	399	CmdsParse(CommandTable, Cmd);
	400	return 0;
	401	}
	402
	403	int CmdHelp(const char *Cmd)
	404	{
	405	CmdsHelp(CommandTable);
	406	return 0;
	407	}