[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 "../common/iso14443crc.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[TRACE_BUFFER_SIZE];
  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 >= TRACE_BUFFER_SIZE) { 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 >= TRACE_BUFFER_SIZE) {
      break;
    }

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

	// Break and stick with current result if buffer was not completely full
	if (frame[0] == 0x44 && frame[1] == 0x44 && frame[2] == 0x44 && frame[3] == 0x44) break; 
	
    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 (datalen == 0)
    {
      PrintAndLog("Missing data 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,10000)) {
            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], "%02X ", 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;
}

int CmdHF14BWrite( const char *Cmd){

/*
 * For SRIX4K  blocks 00 - 7F
 * hf 14b raw -c -p 09 $srix4kwblock $srix4kwdata
 *
 * For SR512  blocks 00 - 0F
 * hf 14b raw -c -p 09 $sr512wblock $sr512wdata
 * 
 * Special block FF =  otp_lock_reg block.
 * Data len 4 bytes-
 */
 	char cmdp = param_getchar(Cmd, 0);
	uint8_t blockno = -1;
	uint8_t data[4] = {0x00};
	bool isSrix4k = true;
	char str[20];	

	if (cmdp == 'h' || cmdp == 'H') {
		PrintAndLog("Usage:  hf 14b write <1|2> <BLOCK> <DATA>");
		PrintAndLog("");
		PrintAndLog("     sample: hf 14b write 1 127 11223344");
		PrintAndLog("     sample: hf 14b write 1 255 11223344");
		PrintAndLog("     sample: hf 14b write 2 15 11223344");
		PrintAndLog("     sample: hf 14b write 2 255 11223344");
		return 0;
	}

	if ( param_getchar(Cmd, 0) == '2' )
		isSrix4k = false;
	
	blockno = param_get8(Cmd, 1);
	
	if ( isSrix4k ){
		if ( blockno > 0x7f && blockno != 0xff ){
			PrintAndLog("Block number out of range");
			return 0;
		}		
	} else {
		if ( blockno > 0x0f && blockno != 0xff ){
			PrintAndLog("Block number out of range");
			return 0;
		}		
	}
	
	if (param_gethex(Cmd, 2, data, 8)) {
		PrintAndLog("Data must include 8 HEX symbols");
		return 0;
	}
 
	if ( blockno == 0xff)
		PrintAndLog("Writing to special block %02X [ %s]", blockno,  sprint_hex(data,4) );
	else
		PrintAndLog("Writing to block %02X [ %s]", blockno,  sprint_hex(data,4) );
 
	sprintf(str, "-c -p 09 %02x %02x%02x%02x%02x", blockno, data[0], data[1], data[2], data[3]);
	CmdHF14BCmdRaw(str);
	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"},
  {"write",       CmdHF14BWrite,  0, "Write data to a SRI512 | SRIX4K 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>
f38a1528	16	#include "../common/iso14443crc.h"
902cb3c0	17	#include "proxmark3.h"
7fe9b0b7	18	#include "data.h"
	19	#include "graph.h"
	20	#include "ui.h"
	21	#include "cmdparser.h"
	22	#include "cmdhf14b.h"
7cf3ef20	23	#include "cmdmain.h"
7fe9b0b7	24
	25	static int CmdHelp(const char *Cmd);
	26
	27	int CmdHF14BDemod(const char *Cmd)
	28	{
	29	int i, j, iold;
	30	int isum, qsum;
	31	int outOfWeakAt;
	32	bool negateI, negateQ;
	33
	34	uint8_t data[256];
	35	int dataLen = 0;
	36
	37	// As received, the samples are pairs, correlations against I and Q
	38	// square waves. So estimate angle of initial carrier (or just
	39	// quadrant, actually), and then do the demod.
	40
	41	// First, estimate where the tag starts modulating.
	42	for (i = 0; i < GraphTraceLen; i += 2) {
	43	if (abs(GraphBuffer[i]) + abs(GraphBuffer[i + 1]) > 40) {
	44	break;
	45	}
	46	}
	47	if (i >= GraphTraceLen) {
	48	PrintAndLog("too weak to sync");
	49	return 0;
	50	}
	51	PrintAndLog("out of weak at %d", i);
	52	outOfWeakAt = i;
	53
	54	// Now, estimate the phase in the initial modulation of the tag
	55	isum = 0;
	56	qsum = 0;
	57	for (; i < (outOfWeakAt + 16); i += 2) {
	58	isum += GraphBuffer[i + 0];
	59	qsum += GraphBuffer[i + 1];
	60	}
	61	negateI = (isum < 0);
	62	negateQ = (qsum < 0);
	63
	64	// Turn the correlation pairs into soft decisions on the bit.
	65	j = 0;
	66	for (i = 0; i < GraphTraceLen / 2; i++) {
	67	int si = GraphBuffer[j];
	68	int sq = GraphBuffer[j + 1];
	69	if (negateI) si = -si;
	70	if (negateQ) sq = -sq;
	71	GraphBuffer[i] = si + sq;
	72	j += 2;
	73	}
	74	GraphTraceLen = i;
	75
	76	i = outOfWeakAt / 2;
	77	while (GraphBuffer[i] > 0 && i < GraphTraceLen)
	78	i++;
	79	if (i >= GraphTraceLen) goto demodError;
	80
	81	iold = i;
	82	while (GraphBuffer[i] < 0 && i < GraphTraceLen)
	83	i++;
	84	if (i >= GraphTraceLen) goto demodError;
	85	if ((i - iold) > 23) goto demodError;
	86
	87	PrintAndLog("make it to demod loop");
88
89	for (;;) {
90	iold = i;
91	while (GraphBuffer[i] >= 0 && i < GraphTraceLen)
92	i++;
93	if (i >= GraphTraceLen) goto demodError;
94	if ((i - iold) > 6) goto demodError;
95
96	uint16_t shiftReg = 0;
97	if (i + 20 >= GraphTraceLen) goto demodError;
98
99	for (j = 0; j < 10; j++) {
100	int soft = GraphBuffer[i] + GraphBuffer[i + 1];
101
102	if (abs(soft) < (abs(isum) + abs(qsum)) / 20) {
103	PrintAndLog("weak bit");
104	}
105
106	shiftReg >>= 1;
107	if(GraphBuffer[i] + GraphBuffer[i+1] >= 0) {
108	shiftReg \|= 0x200;
109	}
110
111	i+= 2;
112	}
113
114	if ((shiftReg & 0x200) && !(shiftReg & 0x001))
115	{
116	// valid data byte, start and stop bits okay
117	PrintAndLog(" %02x", (shiftReg >> 1) & 0xff);
118	data[dataLen++] = (shiftReg >> 1) & 0xff;
119	if (dataLen >= sizeof(data)) {
120	return 0;
121	}
122	} else if (shiftReg == 0x000) {
123	// this is EOF
124	break;
125	} else {
126	goto demodError;
127	}
128	}
129
130	uint8_t first, second;
131	ComputeCrc14443(CRC_14443_B, data, dataLen-2, &first, &second);
132	PrintAndLog("CRC: %02x %02x (%s)\n", first, second,
133	(first == data[dataLen-2] && second == data[dataLen-1]) ?
134	"ok" : "**FAIL**");
135
136	RepaintGraphWindow();
137	return 0;
138
139	demodError:
140	PrintAndLog("demod error");
141	RepaintGraphWindow();
142	return 0;
143	}
144
145	int CmdHF14BList(const char *Cmd)
146	{
95e63594	147	uint8_t got[TRACE_BUFFER_SIZE];
db09cb3a	148	GetFromBigBuf(got,sizeof(got),0);
869cabf7	149	WaitForResponse(CMD_ACK,NULL);
7fe9b0b7	150
	151	PrintAndLog("recorded activity:");
	152	PrintAndLog(" time :rssi: who bytes");
	153	PrintAndLog("---------+----+----+-----------");
	154
	155	int i = 0;
	156	int prev = -1;
	157
	158	for(;;) {
95e63594	159
95e63594	160	if(i >= TRACE_BUFFER_SIZE) { break; }
7fe9b0b7	161
	162	bool isResponse;
	163	int timestamp = ((uint32_t )(got+i));
	164	if(timestamp & 0x80000000) {
	165	timestamp &= 0x7fffffff;
	166	isResponse = 1;
	167	} else {
	168	isResponse = 0;
	169	}
	170	int metric = ((uint32_t )(got+i+4));
	171
	172	int len = got[i+8];
	173
	174	if(len > 100) {
	175	break;
	176	}
95e63594	177	if(i + len >= TRACE_BUFFER_SIZE) {
7fe9b0b7	178	break;
	179	}
	180
	181	uint8_t *frame = (got+i+9);
	182
7bc95e2e	183	// Break and stick with current result if buffer was not completely full
	184	if (frame[0] == 0x44 && frame[1] == 0x44 && frame[2] == 0x44 && frame[3] == 0x44) break;
	185
7fe9b0b7	186	char line[1000] = "";
	187	int j;
	188	for(j = 0; j < len; j++) {
	189	sprintf(line+(j*3), "%02x ", frame[j]);
	190	}
	191
	192	char *crc;
	193	if(len > 2) {
	194	uint8_t b1, b2;
	195	ComputeCrc14443(CRC_14443_B, frame, len-2, &b1, &b2);
	196	if(b1 != frame[len-2] \|\| b2 != frame[len-1]) {
	197	crc = "FAIL CRC";
	198	} else {
	199	crc = "";
	200	}
	201	} else {
	202	crc = "(SHORT)";
	203	}
	204
	205	char metricString[100];
	206	if(isResponse) {
	207	sprintf(metricString, "%3d", metric);
	208	} else {
	209	strcpy(metricString, " ");
	210	}
	211
	212	PrintAndLog(" +%7d: %s: %s %s %s",
	213	(prev < 0 ? 0 : timestamp - prev),
	214	metricString,
	215	(isResponse ? "TAG" : " "), line, crc);
	216
	217	prev = timestamp;
	218	i += (len + 9);
	219	}
	220	return 0;
	221	}
	222
	223	int CmdHF14BRead(const char *Cmd)
	224	{
	225	UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_14443, {strtol(Cmd, NULL, 0), 0, 0}};
	226	SendCommand(&c);
	227	return 0;
	228	}
	229
	230	int CmdHF14Sim(const char *Cmd)
	231	{
	232	UsbCommand c={CMD_SIMULATE_TAG_ISO_14443};
	233	SendCommand(&c);
	234	return 0;
	235	}
	236
	237	int CmdHFSimlisten(const char *Cmd)
	238	{
	239	UsbCommand c = {CMD_SIMULATE_TAG_HF_LISTEN};
	240	SendCommand(&c);
	241	return 0;
	242	}
	243
	244	int CmdHF14BSnoop(const char *Cmd)
	245	{
	246	UsbCommand c = {CMD_SNOOP_ISO_14443};
	247	SendCommand(&c);
	248	return 0;
	249	}
250
251	/* New command to read the contents of a SRI512 tag
252	* SRI512 tags are ISO14443-B modulated memory tags,
253	* this command just dumps the contents of the memory
254	*/
255	int CmdSri512Read(const char *Cmd)
256	{
257	UsbCommand c = {CMD_READ_SRI512_TAG, {strtol(Cmd, NULL, 0), 0, 0}};
258	SendCommand(&c);
259	return 0;
260	}
261
262	/* New command to read the contents of a SRIX4K tag
263	* SRIX4K tags are ISO14443-B modulated memory tags,
264	* this command just dumps the contents of the memory/
265	*/
266	int CmdSrix4kRead(const char *Cmd)
267	{
268	UsbCommand c = {CMD_READ_SRIX4K_TAG, {strtol(Cmd, NULL, 0), 0, 0}};
269	SendCommand(&c);
270	return 0;
271	}
272
7cf3ef20	273	int CmdHF14BCmdRaw (const char *cmd) {
	274	UsbCommand resp;
	275	uint8_t *recv;
	276	UsbCommand c = {CMD_ISO_14443B_COMMAND, {0, 0, 0}}; // len,recv?
	277	uint8_t reply=1;
	278	uint8_t crc=0;
	279	uint8_t power=0;
	280	char buf[5]="";
	281	int i=0;
	282	uint8_t data[100];
	283	unsigned int datalen=0, temp;
	284	char *hexout;
	285
	286	if (strlen(cmd)<3) {
	287	PrintAndLog("Usage: hf 14b raw [-r] [-c] [-p] <0A 0B 0C ... hex>");
	288	PrintAndLog(" -r do not read response");
	289	PrintAndLog(" -c calculate and append CRC");
	290	PrintAndLog(" -p leave the field on after receive");
	291	return 0;
	292	}
	293
	294	// strip
	295	while (cmd==' ' \|\| cmd=='\t') cmd++;
	296
	297	while (cmd[i]!='\0') {
	298	if (cmd[i]==' ' \|\| cmd[i]=='\t') { i++; continue; }
	299	if (cmd[i]=='-') {
	300	switch (cmd[i+1]) {
	301	case 'r':
	302	case 'R':
	303	reply=0;
	304	break;
	305	case 'c':
	306	case 'C':
	307	crc=1;
	308	break;
	309	case 'p':
	310	case 'P':
	311	power=1;
	312	break;
	313	default:
	314	PrintAndLog("Invalid option");
	315	return 0;
	316	}
	317	i+=2;
	318	continue;
	319	}
	320	if ((cmd[i]>='0' && cmd[i]<='9') \|\|
	321	(cmd[i]>='a' && cmd[i]<='f') \|\|
	322	(cmd[i]>='A' && cmd[i]<='F') ) {
	323	buf[strlen(buf)+1]=0;
	324	buf[strlen(buf)]=cmd[i];
	325	i++;
	326
	327	if (strlen(buf)>=2) {
	328	sscanf(buf,"%x",&temp);
	329	data[datalen]=(uint8_t)(temp & 0xff);
	330	datalen++;
	331	*buf=0;
	332	}
	333	continue;
	334	}
	335	PrintAndLog("Invalid char on input");
	336	return 0;
337	}
06b82e6a	338	if (datalen == 0)
	339	{
	340	PrintAndLog("Missing data input");
	341	return 0;
	342	}
7cf3ef20	343	if(crc)
	344	{
	345	uint8_t first, second;
	346	ComputeCrc14443(CRC_14443_B, data, datalen, &first, &second);
	347	data[datalen++] = first;
	348	data[datalen++] = second;
	349	}
	350
	351	c.arg[0] = datalen;
	352	c.arg[1] = reply;
	353	c.arg[2] = power;
	354	memcpy(c.d.asBytes,data,datalen);
	355
	356	SendCommand(&c);
	357
	358	if (reply) {
95e63594	359	if (WaitForResponseTimeout(CMD_ACK,&resp,10000)) {
7cf3ef20	360	recv = resp.d.asBytes;
	361	PrintAndLog("received %i octets",resp.arg[0]);
	362	if(!resp.arg[0])
	363	return 0;
	364	hexout = (char )malloc(resp.arg[0] 3 + 1);
	365	if (hexout != NULL) {
	366	uint8_t first, second;
	367	for (int i = 0; i < resp.arg[0]; i++) { // data in hex
7bb9d33e	368	sprintf(&hexout[i * 3], "%02X ", recv[i]);
7cf3ef20	369	}
	370	PrintAndLog("%s", hexout);
	371	free(hexout);
	372	ComputeCrc14443(CRC_14443_B, recv, resp.arg[0]-2, &first, &second);
	373	if(recv[resp.arg[0]-2]==first && recv[resp.arg[0]-1]==second) {
	374	PrintAndLog("CRC OK");
	375	} else {
	376	PrintAndLog("CRC failed");
	377	}
	378	} else {
	379	PrintAndLog("malloc failed your client has low memory?");
	380	}
	381	} else {
	382	PrintAndLog("timeout while waiting for reply.");
	383	}
	384	} // if reply
	385	return 0;
	386	}
	387
0222acfc	388	int CmdHF14BWrite( const char *Cmd){
	389
	390	/*
	391	* For SRIX4K blocks 00 - 7F
	392	* hf 14b raw -c -p 09 $srix4kwblock $srix4kwdata
	393	*
	394	* For SR512 blocks 00 - 0F
	395	* hf 14b raw -c -p 09 $sr512wblock $sr512wdata
	396	*
	397	* Special block FF = otp_lock_reg block.
	398	* Data len 4 bytes-
	399	*/
	400	char cmdp = param_getchar(Cmd, 0);
	401	uint8_t blockno = -1;
	402	uint8_t data[4] = {0x00};
	403	bool isSrix4k = true;
	404	char str[20];
	405
	406	if (cmdp == 'h' \|\| cmdp == 'H') {
	407	PrintAndLog("Usage: hf 14b write <1\|2> <BLOCK> <DATA>");
	408	PrintAndLog("");
	409	PrintAndLog(" sample: hf 14b write 1 127 11223344");
	410	PrintAndLog(" sample: hf 14b write 1 255 11223344");
	411	PrintAndLog(" sample: hf 14b write 2 15 11223344");
	412	PrintAndLog(" sample: hf 14b write 2 255 11223344");
	413	return 0;
	414	}
	415
	416	if ( param_getchar(Cmd, 0) == '2' )
	417	isSrix4k = false;
	418
	419	blockno = param_get8(Cmd, 1);
	420
	421	if ( isSrix4k ){
	422	if ( blockno > 0x7f && blockno != 0xff ){
	423	PrintAndLog("Block number out of range");
	424	return 0;
	425	}
	426	} else {
	427	if ( blockno > 0x0f && blockno != 0xff ){
	428	PrintAndLog("Block number out of range");
	429	return 0;
	430	}
	431	}
	432
	433	if (param_gethex(Cmd, 2, data, 8)) {
	434	PrintAndLog("Data must include 8 HEX symbols");
	435	return 0;
	436	}
	437
	438	if ( blockno == 0xff)
	439	PrintAndLog("Writing to special block %02X [ %s]", blockno, sprint_hex(data,4) );
	440	else
	441	PrintAndLog("Writing to block %02X [ %s]", blockno, sprint_hex(data,4) );
	442
	443	sprintf(str, "-c -p 09 %02x %02x%02x%02x%02x", blockno, data[0], data[1], data[2], data[3]);
	444	CmdHF14BCmdRaw(str);
	445	return 0;
	446	}
	447
7fe9b0b7	448	static command_t CommandTable[] =
	449	{
	450	{"help", CmdHelp, 1, "This help"},
	451	{"demod", CmdHF14BDemod, 1, "Demodulate ISO14443 Type B from tag"},
	452	{"list", CmdHF14BList, 0, "List ISO 14443 history"},
	453	{"read", CmdHF14BRead, 0, "Read HF tag (ISO 14443)"},
	454	{"sim", CmdHF14Sim, 0, "Fake ISO 14443 tag"},
	455	{"simlisten", CmdHFSimlisten, 0, "Get HF samples as fake tag"},
	456	{"snoop", CmdHF14BSnoop, 0, "Eavesdrop ISO 14443"},
7cf3ef20	457	{"sri512read", CmdSri512Read, 0, "Read contents of a SRI512 tag"},
	458	{"srix4kread", CmdSrix4kRead, 0, "Read contents of a SRIX4K tag"},
	459	{"raw", CmdHF14BCmdRaw, 0, "Send raw hex data to tag"},
0222acfc	460	{"write", CmdHF14BWrite, 0, "Write data to a SRI512 \| SRIX4K tag"},
7fe9b0b7	461	{NULL, NULL, 0, NULL}
	462	};
	463
	464	int CmdHF14B(const char *Cmd)
	465	{
	466	CmdsParse(CommandTable, Cmd);
	467	return 0;
	468	}
	469
	470	int CmdHelp(const char *Cmd)
	471	{
	472	CmdsHelp(CommandTable);
	473	return 0;
	474	}