[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 "proxmark3.h"
#include "data.h"
#include "graph.h"
#include "util.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);

	// 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,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], "%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>
	16	#include "iso14443crc.h"
902cb3c0	17	#include "proxmark3.h"
7fe9b0b7	18	#include "data.h"
7fe9b0b7	19	#include "graph.h"
3fe4ff4f	20	#include "util.h"
7fe9b0b7	21	#include "ui.h"
	22	#include "cmdparser.h"
	23	#include "cmdhf14b.h"
7cf3ef20	24	#include "cmdmain.h"
7fe9b0b7	25
3fe4ff4f	26
7fe9b0b7	27	static int CmdHelp(const char *Cmd);
	28
	29	int CmdHF14BDemod(const char *Cmd)
	30	{
	31	int i, j, iold;
	32	int isum, qsum;
	33	int outOfWeakAt;
	34	bool negateI, negateQ;
	35
	36	uint8_t data[256];
	37	int dataLen = 0;
	38
	39	// As received, the samples are pairs, correlations against I and Q
	40	// square waves. So estimate angle of initial carrier (or just
	41	// quadrant, actually), and then do the demod.
	42
	43	// First, estimate where the tag starts modulating.
	44	for (i = 0; i < GraphTraceLen; i += 2) {
	45	if (abs(GraphBuffer[i]) + abs(GraphBuffer[i + 1]) > 40) {
	46	break;
	47	}
	48	}
	49	if (i >= GraphTraceLen) {
	50	PrintAndLog("too weak to sync");
	51	return 0;
	52	}
	53	PrintAndLog("out of weak at %d", i);
	54	outOfWeakAt = i;
	55
	56	// Now, estimate the phase in the initial modulation of the tag
	57	isum = 0;
	58	qsum = 0;
	59	for (; i < (outOfWeakAt + 16); i += 2) {
	60	isum += GraphBuffer[i + 0];
	61	qsum += GraphBuffer[i + 1];
	62	}
	63	negateI = (isum < 0);
	64	negateQ = (qsum < 0);
	65
	66	// Turn the correlation pairs into soft decisions on the bit.
	67	j = 0;
	68	for (i = 0; i < GraphTraceLen / 2; i++) {
	69	int si = GraphBuffer[j];
	70	int sq = GraphBuffer[j + 1];
	71	if (negateI) si = -si;
	72	if (negateQ) sq = -sq;
	73	GraphBuffer[i] = si + sq;
	74	j += 2;
	75	}
	76	GraphTraceLen = i;
	77
	78	i = outOfWeakAt / 2;
	79	while (GraphBuffer[i] > 0 && i < GraphTraceLen)
	80	i++;
	81	if (i >= GraphTraceLen) goto demodError;
	82
	83	iold = i;
	84	while (GraphBuffer[i] < 0 && i < GraphTraceLen)
	85	i++;
	86	if (i >= GraphTraceLen) goto demodError;
	87	if ((i - iold) > 23) goto demodError;
	88
	89	PrintAndLog("make it to demod loop");
	90
91	for (;;) {
92	iold = i;
93	while (GraphBuffer[i] >= 0 && i < GraphTraceLen)
94	i++;
95	if (i >= GraphTraceLen) goto demodError;
96	if ((i - iold) > 6) goto demodError;
97
98	uint16_t shiftReg = 0;
99	if (i + 20 >= GraphTraceLen) goto demodError;
100
101	for (j = 0; j < 10; j++) {
102	int soft = GraphBuffer[i] + GraphBuffer[i + 1];
103
104	if (abs(soft) < (abs(isum) + abs(qsum)) / 20) {
105	PrintAndLog("weak bit");
106	}
107
108	shiftReg >>= 1;
109	if(GraphBuffer[i] + GraphBuffer[i+1] >= 0) {
110	shiftReg \|= 0x200;
111	}
112
113	i+= 2;
114	}
115
116	if ((shiftReg & 0x200) && !(shiftReg & 0x001))
117	{
118	// valid data byte, start and stop bits okay
119	PrintAndLog(" %02x", (shiftReg >> 1) & 0xff);
120	data[dataLen++] = (shiftReg >> 1) & 0xff;
121	if (dataLen >= sizeof(data)) {
122	return 0;
123	}
124	} else if (shiftReg == 0x000) {
125	// this is EOF
126	break;
127	} else {
128	goto demodError;
129	}
130	}
131
132	uint8_t first, second;
133	ComputeCrc14443(CRC_14443_B, data, dataLen-2, &first, &second);
134	PrintAndLog("CRC: %02x %02x (%s)\n", first, second,
135	(first == data[dataLen-2] && second == data[dataLen-1]) ?
136	"ok" : "**FAIL**");
137
138	RepaintGraphWindow();
139	return 0;
140
141	demodError:
142	PrintAndLog("demod error");
143	RepaintGraphWindow();
144	return 0;
145	}
146
147	int CmdHF14BList(const char *Cmd)
148	{
149	uint8_t got[960];
db09cb3a	150	GetFromBigBuf(got,sizeof(got),0);
869cabf7	151	WaitForResponse(CMD_ACK,NULL);
7fe9b0b7	152
	153	PrintAndLog("recorded activity:");
	154	PrintAndLog(" time :rssi: who bytes");
	155	PrintAndLog("---------+----+----+-----------");
	156
	157	int i = 0;
	158	int prev = -1;
	159
	160	for(;;) {
	161	if(i >= 900) {
	162	break;
	163	}
	164
	165	bool isResponse;
	166	int timestamp = ((uint32_t )(got+i));
	167	if(timestamp & 0x80000000) {
	168	timestamp &= 0x7fffffff;
	169	isResponse = 1;
	170	} else {
	171	isResponse = 0;
	172	}
	173	int metric = ((uint32_t )(got+i+4));
	174
	175	int len = got[i+8];
	176
	177	if(len > 100) {
	178	break;
	179	}
	180	if(i + len >= 900) {
	181	break;
	182	}
	183
	184	uint8_t *frame = (got+i+9);
	185
7bc95e2e	186	// Break and stick with current result if buffer was not completely full
	187	if (frame[0] == 0x44 && frame[1] == 0x44 && frame[2] == 0x44 && frame[3] == 0x44) break;
	188
7fe9b0b7	189	char line[1000] = "";
	190	int j;
	191	for(j = 0; j < len; j++) {
	192	sprintf(line+(j*3), "%02x ", frame[j]);
	193	}
	194
	195	char *crc;
	196	if(len > 2) {
	197	uint8_t b1, b2;
	198	ComputeCrc14443(CRC_14443_B, frame, len-2, &b1, &b2);
	199	if(b1 != frame[len-2] \|\| b2 != frame[len-1]) {
	200	crc = "FAIL CRC";
	201	} else {
	202	crc = "";
	203	}
	204	} else {
	205	crc = "(SHORT)";
	206	}
	207
	208	char metricString[100];
	209	if(isResponse) {
	210	sprintf(metricString, "%3d", metric);
	211	} else {
	212	strcpy(metricString, " ");
	213	}
	214
	215	PrintAndLog(" +%7d: %s: %s %s %s",
	216	(prev < 0 ? 0 : timestamp - prev),
	217	metricString,
	218	(isResponse ? "TAG" : " "), line, crc);
	219
	220	prev = timestamp;
	221	i += (len + 9);
	222	}
	223	return 0;
	224	}
	225
	226	int CmdHF14BRead(const char *Cmd)
	227	{
	228	UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_14443, {strtol(Cmd, NULL, 0), 0, 0}};
	229	SendCommand(&c);
	230	return 0;
	231	}
	232
	233	int CmdHF14Sim(const char *Cmd)
	234	{
	235	UsbCommand c={CMD_SIMULATE_TAG_ISO_14443};
	236	SendCommand(&c);
	237	return 0;
	238	}
	239
	240	int CmdHFSimlisten(const char *Cmd)
	241	{
	242	UsbCommand c = {CMD_SIMULATE_TAG_HF_LISTEN};
	243	SendCommand(&c);
	244	return 0;
	245	}
	246
	247	int CmdHF14BSnoop(const char *Cmd)
	248	{
	249	UsbCommand c = {CMD_SNOOP_ISO_14443};
	250	SendCommand(&c);
	251	return 0;
	252	}
253
254	/* New command to read the contents of a SRI512 tag
255	* SRI512 tags are ISO14443-B modulated memory tags,
256	* this command just dumps the contents of the memory
257	*/
258	int CmdSri512Read(const char *Cmd)
259	{
260	UsbCommand c = {CMD_READ_SRI512_TAG, {strtol(Cmd, NULL, 0), 0, 0}};
261	SendCommand(&c);
262	return 0;
263	}
264
265	/* New command to read the contents of a SRIX4K tag
266	* SRIX4K tags are ISO14443-B modulated memory tags,
267	* this command just dumps the contents of the memory/
268	*/
269	int CmdSrix4kRead(const char *Cmd)
270	{
271	UsbCommand c = {CMD_READ_SRIX4K_TAG, {strtol(Cmd, NULL, 0), 0, 0}};
272	SendCommand(&c);
273	return 0;
274	}
275
7cf3ef20	276	int CmdHF14BCmdRaw (const char *cmd) {
	277	UsbCommand resp;
	278	uint8_t *recv;
	279	UsbCommand c = {CMD_ISO_14443B_COMMAND, {0, 0, 0}}; // len,recv?
	280	uint8_t reply=1;
	281	uint8_t crc=0;
	282	uint8_t power=0;
	283	char buf[5]="";
	284	int i=0;
	285	uint8_t data[100];
	286	unsigned int datalen=0, temp;
	287	char *hexout;
	288
	289	if (strlen(cmd)<3) {
	290	PrintAndLog("Usage: hf 14b raw [-r] [-c] [-p] <0A 0B 0C ... hex>");
	291	PrintAndLog(" -r do not read response");
	292	PrintAndLog(" -c calculate and append CRC");
	293	PrintAndLog(" -p leave the field on after receive");
	294	return 0;
	295	}
	296
	297	// strip
	298	while (cmd==' ' \|\| cmd=='\t') cmd++;
	299
	300	while (cmd[i]!='\0') {
	301	if (cmd[i]==' ' \|\| cmd[i]=='\t') { i++; continue; }
	302	if (cmd[i]=='-') {
	303	switch (cmd[i+1]) {
	304	case 'r':
	305	case 'R':
	306	reply=0;
	307	break;
	308	case 'c':
	309	case 'C':
	310	crc=1;
	311	break;
	312	case 'p':
	313	case 'P':
	314	power=1;
	315	break;
	316	default:
	317	PrintAndLog("Invalid option");
	318	return 0;
	319	}
	320	i+=2;
	321	continue;
	322	}
	323	if ((cmd[i]>='0' && cmd[i]<='9') \|\|
	324	(cmd[i]>='a' && cmd[i]<='f') \|\|
	325	(cmd[i]>='A' && cmd[i]<='F') ) {
	326	buf[strlen(buf)+1]=0;
	327	buf[strlen(buf)]=cmd[i];
	328	i++;
	329
	330	if (strlen(buf)>=2) {
	331	sscanf(buf,"%x",&temp);
	332	data[datalen]=(uint8_t)(temp & 0xff);
	333	datalen++;
	334	*buf=0;
	335	}
	336	continue;
	337	}
	338	PrintAndLog("Invalid char on input");
	339	return 0;
340	}
06b82e6a	341	if (datalen == 0)
	342	{
	343	PrintAndLog("Missing data input");
	344	return 0;
	345	}
7cf3ef20	346	if(crc)
	347	{
	348	uint8_t first, second;
	349	ComputeCrc14443(CRC_14443_B, data, datalen, &first, &second);
	350	data[datalen++] = first;
	351	data[datalen++] = second;
	352	}
	353
	354	c.arg[0] = datalen;
	355	c.arg[1] = reply;
	356	c.arg[2] = power;
	357	memcpy(c.d.asBytes,data,datalen);
	358
	359	SendCommand(&c);
	360
	361	if (reply) {
	362	if (WaitForResponseTimeout(CMD_ACK,&resp,1000)) {
	363	recv = resp.d.asBytes;
	364	PrintAndLog("received %i octets",resp.arg[0]);
	365	if(!resp.arg[0])
	366	return 0;
	367	hexout = (char )malloc(resp.arg[0] 3 + 1);
	368	if (hexout != NULL) {
	369	uint8_t first, second;
	370	for (int i = 0; i < resp.arg[0]; i++) { // data in hex
7bb9d33e	371	sprintf(&hexout[i * 3], "%02X ", recv[i]);
7cf3ef20	372	}
	373	PrintAndLog("%s", hexout);
	374	free(hexout);
	375	ComputeCrc14443(CRC_14443_B, recv, resp.arg[0]-2, &first, &second);
	376	if(recv[resp.arg[0]-2]==first && recv[resp.arg[0]-1]==second) {
	377	PrintAndLog("CRC OK");
	378	} else {
	379	PrintAndLog("CRC failed");
	380	}
	381	} else {
	382	PrintAndLog("malloc failed your client has low memory?");
	383	}
	384	} else {
	385	PrintAndLog("timeout while waiting for reply.");
	386	}
	387	} // if reply
	388	return 0;
	389	}
	390
3fe4ff4f	391	int CmdHF14BWrite( const char *Cmd){
	392
	393	/*
	394	* For SRIX4K blocks 00 - 7F
	395	* hf 14b raw -c -p 09 $srix4kwblock $srix4kwdata
	396	*
	397	* For SR512 blocks 00 - 0F
	398	* hf 14b raw -c -p 09 $sr512wblock $sr512wdata
	399	*
	400	* Special block FF = otp_lock_reg block.
	401	* Data len 4 bytes-
	402	*/
	403	char cmdp = param_getchar(Cmd, 0);
	404	uint8_t blockno = -1;
	405	uint8_t data[4] = {0x00};
	406	bool isSrix4k = true;
	407	char str[20];
	408
	409	if (cmdp == 'h' \|\| cmdp == 'H') {
	410	PrintAndLog("Usage: hf 14b write <1\|2> <BLOCK> <DATA>");
	411	PrintAndLog("");
	412	PrintAndLog(" sample: hf 14b write 1 127 11223344");
	413	PrintAndLog(" sample: hf 14b write 1 255 11223344");
	414	PrintAndLog(" sample: hf 14b write 2 15 11223344");
	415	PrintAndLog(" sample: hf 14b write 2 255 11223344");
	416	return 0;
	417	}
	418
	419	if ( param_getchar(Cmd, 0) == '2' )
	420	isSrix4k = false;
	421
	422	blockno = param_get8(Cmd, 1);
	423
	424	if ( isSrix4k ){
	425	if ( blockno > 0x7f && blockno != 0xff ){
	426	PrintAndLog("Block number out of range");
	427	return 0;
	428	}
	429	} else {
	430	if ( blockno > 0x0f && blockno != 0xff ){
	431	PrintAndLog("Block number out of range");
	432	return 0;
	433	}
	434	}
	435
	436	if (param_gethex(Cmd, 2, data, 8)) {
	437	PrintAndLog("Data must include 8 HEX symbols");
	438	return 0;
	439	}
	440
	441	if ( blockno == 0xff)
	442	PrintAndLog("Writing to special block %02X [ %s]", blockno, sprint_hex(data,4) );
	443	else
	444	PrintAndLog("Writing to block %02X [ %s]", blockno, sprint_hex(data,4) );
	445
	446	sprintf(str, "-c -p 09 %02x %02x%02x%02x%02x", blockno, data[0], data[1], data[2], data[3]);
	447	CmdHF14BCmdRaw(str);
	448	return 0;
	449	}
	450
7fe9b0b7	451	static command_t CommandTable[] =
	452	{
	453	{"help", CmdHelp, 1, "This help"},
	454	{"demod", CmdHF14BDemod, 1, "Demodulate ISO14443 Type B from tag"},
	455	{"list", CmdHF14BList, 0, "List ISO 14443 history"},
	456	{"read", CmdHF14BRead, 0, "Read HF tag (ISO 14443)"},
	457	{"sim", CmdHF14Sim, 0, "Fake ISO 14443 tag"},
	458	{"simlisten", CmdHFSimlisten, 0, "Get HF samples as fake tag"},
	459	{"snoop", CmdHF14BSnoop, 0, "Eavesdrop ISO 14443"},
7cf3ef20	460	{"sri512read", CmdSri512Read, 0, "Read contents of a SRI512 tag"},
	461	{"srix4kread", CmdSrix4kRead, 0, "Read contents of a SRIX4K tag"},
	462	{"raw", CmdHF14BCmdRaw, 0, "Send raw hex data to tag"},
3fe4ff4f	463	{"write", CmdHF14BWrite, 0, "Write data to a SRI512 \| SRIX4K tag"},
7fe9b0b7	464	{NULL, NULL, 0, NULL}
	465	};
	466
	467	int CmdHF14B(const char *Cmd)
	468	{
	469	CmdsParse(CommandTable, Cmd);
	470	return 0;
	471	}
	472
	473	int CmdHelp(const char *Cmd)
	474	{
	475	CmdsHelp(CommandTable);
	476	return 0;
	477	}