[proxmark3-svn] / client / cmdlfhitag.c

//-----------------------------------------------------------------------------
// Copyright (C) 2012 Roel Verdult
//
// 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.
//-----------------------------------------------------------------------------
// Low frequency Hitag support
//-----------------------------------------------------------------------------

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "data.h"
#include "proxmark3.h"
#include "ui.h"
#include "cmdparser.h"
#include "common.h"
#include "util.h"
#include "hitag2.h"
#include "sleep.h"
#include "cmdmain.h"

static int CmdHelp(const char *Cmd);

size_t nbytes(size_t nbits) {
	return (nbits/8)+((nbits%8)>0);
}

int CmdLFHitagList(const char *Cmd)
{
 	uint8_t *got = malloc(USB_CMD_DATA_SIZE);

	// Query for the actual size of the trace
	UsbCommand response;
	GetFromBigBuf(got, USB_CMD_DATA_SIZE, 0);
	WaitForResponse(CMD_ACK, &response);
	uint16_t traceLen = response.arg[2];
	if (traceLen > USB_CMD_DATA_SIZE) {
		uint8_t *p = realloc(got, traceLen);
		if (p == NULL) {
			PrintAndLog("Cannot allocate memory for trace");
			free(got);
			return 2;
		}
		got = p;
		GetFromBigBuf(got, traceLen, 0);
		WaitForResponse(CMD_ACK,NULL);
	}
	
	PrintAndLog("recorded activity (TraceLen = %d bytes):");
	PrintAndLog(" ETU     :nbits: who bytes");
	PrintAndLog("---------+-----+----+-----------");

	int i = 0;
	int prev = -1;
	int len = strlen(Cmd);

	char filename[FILE_PATH_SIZE]  = { 0x00 };
	FILE* pf = NULL;
  	
	if (len > FILE_PATH_SIZE) 
		len = FILE_PATH_SIZE;
	memcpy(filename, Cmd, len);
   
	if (strlen(filename) > 0) {
		if ((pf = fopen(filename,"wb")) == NULL) {
			PrintAndLog("Error: Could not open file [%s]",filename);
			return 1;
		}
	}

	for (;;) {
  
		if(i > traceLen) { break; }

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

		int parityBits = *((uint32_t *)(got+i+4));
		// 4 bytes of additional information...
		// maximum of 32 additional parity bit information
		//
		// TODO:
		// at each quarter bit period we can send power level (16 levels)
		// or each half bit period in 256 levels.

		int bits = got[i+8];
		int len = nbytes(got[i+8]);

		if (len > 100) {
		  break;
		}
		if (i + len > traceLen) { 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[3] == 0x44) { break; }

		char line[1000] = "";
		int j;
		for (j = 0; j < len; j++) {
		  int oddparity = 0x01;
		  int k;

		  for (k=0;k<8;k++) {
			oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01);
		  }

		  //if((parityBits >> (len - j - 1)) & 0x01) {
		  if (isResponse && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
			sprintf(line+(j*4), "%02x!  ", frame[j]);
		  }
		  else {
			sprintf(line+(j*4), "%02x   ", frame[j]);
		  }
		}

		PrintAndLog(" +%7d:  %3d: %s %s",
			(prev < 0 ? 0 : (timestamp - prev)),
			bits,
			(isResponse ? "TAG" : "   "),
			line);

		if (pf) {
			fprintf(pf," +%7d:  %3d: %s %s\n",
				(prev < 0 ? 0 : (timestamp - prev)),
				bits,
				(isResponse ? "TAG" : "   "),
				line);
		}
		
		prev = timestamp;
		i += (len + 9);
	}
  
	if (pf) {
		fclose(pf);
		PrintAndLog("Recorded activity succesfully written to file: %s", filename);
	}

	free(got);
	return 0;
}

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

int CmdLFHitagSim(const char *Cmd) {
    
  UsbCommand c = {CMD_SIMULATE_HITAG};
	char filename[FILE_PATH_SIZE] = { 0x00 };
	FILE* pf;
	bool tag_mem_supplied;
	int len = strlen(Cmd);
	if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
	memcpy(filename, Cmd, len);
	
	if (strlen(filename) > 0) {
		if ((pf = fopen(filename,"rb+")) == NULL) {
			PrintAndLog("Error: Could not open file [%s]",filename);
			return 1;
		}
		tag_mem_supplied = true;
		if (fread(c.d.asBytes,48,1,pf) == 0) {
      PrintAndLog("Error: File reading error");
      fclose(pf);
			return 1;
    }
		fclose(pf);
	} else {
		tag_mem_supplied = false;
	}
	
	// Does the tag comes with memory
	c.arg[0] = (uint32_t)tag_mem_supplied;

  SendCommand(&c);
  return 0;
}

int CmdLFHitagReader(const char *Cmd) {
//  UsbCommand c = {CMD_READER_HITAG};
	
//	param_get32ex(Cmd,1,0,16);
	UsbCommand c = {CMD_READER_HITAG};//, {param_get32ex(Cmd,0,0,10),param_get32ex(Cmd,1,0,16),param_get32ex(Cmd,2,0,16),param_get32ex(Cmd,3,0,16)}};
	hitag_data* htd = (hitag_data*)c.d.asBytes;
	hitag_function htf = param_get32ex(Cmd,0,0,10);
	
	switch (htf) {
		case RHT2F_PASSWORD: {
			num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->pwd.password);
		} break;
		case RHT2F_AUTHENTICATE: {
			num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->auth.NrAr);
			num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
		} break;
		case RHT2F_CRYPTO: {
			num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
//			num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
		} break;
		case RHT2F_TEST_AUTH_ATTEMPTS: {
			// No additional parameters needed
		} break;
		default: {
			PrintAndLog("Error: unkown reader function %d",htf);
			PrintAndLog("Hitag reader functions");
			PrintAndLog(" HitagS (0*)");
			PrintAndLog(" Hitag1 (1*)");
			PrintAndLog(" Hitag2 (2*)");
			PrintAndLog("  21 <password> (password mode)");
			PrintAndLog("  22 <nr> <ar> (authentication)");
			PrintAndLog("  23 <key> (authentication) key is in format: ISK high + ISK low");
			PrintAndLog("  25 (test recorded authentications)");
			return 1;
		} break;
	}

	// Copy the hitag2 function into the first argument
	c.arg[0] = htf;

  // Send the command to the proxmark
  SendCommand(&c);
  
  UsbCommand resp;
  WaitForResponse(CMD_ACK,&resp);
  
  // Check the return status, stored in the first argument
  if (resp.arg[0] == false) return 1;
    
  uint32_t id = bytes_to_num(resp.d.asBytes,4);
  char filename[256];
  FILE* pf = NULL;

  sprintf(filename,"%08x_%04x.ht2",id,(rand() & 0xffff));
  if ((pf = fopen(filename,"wb")) == NULL) {
    PrintAndLog("Error: Could not open file [%s]",filename);
    return 1;
  }
  
  // Write the 48 tag memory bytes to file and finalize
  fwrite(resp.d.asBytes,1,48,pf);
  fclose(pf);

  PrintAndLog("Succesfully saved tag memory to [%s]",filename);
  
  return 0;
}

static command_t CommandTable[] = 
{
  {"help",    CmdHelp,           1, "This help"},
  {"list",    CmdLFHitagList,    1, "<outfile> List Hitag trace history"},
  {"reader",  CmdLFHitagReader,  1, "Act like a Hitag Reader"},
  {"sim",     CmdLFHitagSim,     1, "<infile> Simulate Hitag transponder"},
  {"snoop",   CmdLFHitagSnoop,   1, "Eavesdrop Hitag communication"},
		{NULL, NULL, 0, NULL}
};

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

int CmdHelp(const char *Cmd)
{
  CmdsHelp(CommandTable);
  return 0;
}
Commit	Line	Data
db09cb3a	1	//-----------------------------------------------------------------------------
	2	// Copyright (C) 2012 Roel Verdult
	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	// Low frequency Hitag support
	9	//-----------------------------------------------------------------------------
	10
	11	#include <stdio.h>
	12	#include <stdlib.h>
	13	#include <string.h>
	14	#include "data.h"
902cb3c0	15	#include "proxmark3.h"
db09cb3a	16	#include "ui.h"
	17	#include "cmdparser.h"
	18	#include "common.h"
	19	#include "util.h"
	20	#include "hitag2.h"
902cb3c0	21	#include "sleep.h"
902cb3c0	22	#include "cmdmain.h"
db09cb3a	23
	24	static int CmdHelp(const char *Cmd);
	25
47e18126	26	size_t nbytes(size_t nbits) {
	27	return (nbits/8)+((nbits%8)>0);
	28	}
	29
db09cb3a	30	int CmdLFHitagList(const char *Cmd)
db09cb3a	31	{
f71f4deb	32	uint8_t *got = malloc(USB_CMD_DATA_SIZE);
	33
	34	// Query for the actual size of the trace
	35	UsbCommand response;
	36	GetFromBigBuf(got, USB_CMD_DATA_SIZE, 0);
	37	WaitForResponse(CMD_ACK, &response);
	38	uint16_t traceLen = response.arg[2];
	39	if (traceLen > USB_CMD_DATA_SIZE) {
	40	uint8_t *p = realloc(got, traceLen);
	41	if (p == NULL) {
	42	PrintAndLog("Cannot allocate memory for trace");
	43	free(got);
	44	return 2;
	45	}
	46	got = p;
	47	GetFromBigBuf(got, traceLen, 0);
	48	WaitForResponse(CMD_ACK,NULL);
	49	}
	50
	51	PrintAndLog("recorded activity (TraceLen = %d bytes):");
	52	PrintAndLog(" ETU :nbits: who bytes");
	53	PrintAndLog("---------+-----+----+-----------");
db09cb3a	54
f71f4deb	55	int i = 0;
	56	int prev = -1;
	57	int len = strlen(Cmd);
b915fda3	58
f71f4deb	59	char filename[FILE_PATH_SIZE] = { 0x00 };
f71f4deb	60	FILE* pf = NULL;
b915fda3	61
f71f4deb	62	if (len > FILE_PATH_SIZE)
	63	len = FILE_PATH_SIZE;
	64	memcpy(filename, Cmd, len);
b915fda3	65
f71f4deb	66	if (strlen(filename) > 0) {
	67	if ((pf = fopen(filename,"wb")) == NULL) {
	68	PrintAndLog("Error: Could not open file [%s]",filename);
	69	return 1;
	70	}
b915fda3	71	}
db09cb3a	72
f71f4deb	73	for (;;) {
b915fda3	74
f71f4deb	75	if(i > traceLen) { break; }
	76
	77	bool isResponse;
	78	int timestamp = ((uint32_t )(got+i));
	79	if (timestamp & 0x80000000) {
	80	timestamp &= 0x7fffffff;
	81	isResponse = 1;
	82	} else {
	83	isResponse = 0;
	84	}
	85
	86	int parityBits = ((uint32_t )(got+i+4));
	87	// 4 bytes of additional information...
	88	// maximum of 32 additional parity bit information
	89	//
	90	// TODO:
	91	// at each quarter bit period we can send power level (16 levels)
	92	// or each half bit period in 256 levels.
	93
	94	int bits = got[i+8];
	95	int len = nbytes(got[i+8]);
	96
	97	if (len > 100) {
	98	break;
	99	}
	100	if (i + len > traceLen) { break;}
	101
	102	uint8_t *frame = (got+i+9);
	103
	104	// Break and stick with current result if buffer was not completely full
	105	if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; }
	106
	107	char line[1000] = "";
	108	int j;
	109	for (j = 0; j < len; j++) {
	110	int oddparity = 0x01;
	111	int k;
	112
	113	for (k=0;k<8;k++) {
	114	oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01);
	115	}
	116
	117	//if((parityBits >> (len - j - 1)) & 0x01) {
	118	if (isResponse && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
	119	sprintf(line+(j*4), "%02x! ", frame[j]);
	120	}
	121	else {
	122	sprintf(line+(j*4), "%02x ", frame[j]);
	123	}
	124	}
	125
	126	PrintAndLog(" +%7d: %3d: %s %s",
	127	(prev < 0 ? 0 : (timestamp - prev)),
	128	bits,
	129	(isResponse ? "TAG" : " "),
	130	line);
	131
	132	if (pf) {
	133	fprintf(pf," +%7d: %3d: %s %s\n",
	134	(prev < 0 ? 0 : (timestamp - prev)),
	135	bits,
	136	(isResponse ? "TAG" : " "),
	137	line);
	138	}
139
140	prev = timestamp;
141	i += (len + 9);
142	}
2d495a81	143
f71f4deb	144	if (pf) {
	145	fclose(pf);
	146	PrintAndLog("Recorded activity succesfully written to file: %s", filename);
	147	}
97d582a6	148
f71f4deb	149	free(got);
f71f4deb	150	return 0;
db09cb3a	151	}
	152
	153	int CmdLFHitagSnoop(const char *Cmd) {
	154	UsbCommand c = {CMD_SNOOP_HITAG};
	155	SendCommand(&c);
	156	return 0;
	157	}
	158
	159	int CmdLFHitagSim(const char *Cmd) {
b915fda3	160
db09cb3a	161	UsbCommand c = {CMD_SIMULATE_HITAG};
b915fda3	162	char filename[FILE_PATH_SIZE] = { 0x00 };
db09cb3a	163	FILE* pf;
db09cb3a	164	bool tag_mem_supplied;
b915fda3	165	int len = strlen(Cmd);
	166	if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
	167	memcpy(filename, Cmd, len);
db09cb3a	168
	169	if (strlen(filename) > 0) {
	170	if ((pf = fopen(filename,"rb+")) == NULL) {
	171	PrintAndLog("Error: Could not open file [%s]",filename);
	172	return 1;
	173	}
	174	tag_mem_supplied = true;
759c16b3	175	if (fread(c.d.asBytes,48,1,pf) == 0) {
759c16b3	176	PrintAndLog("Error: File reading error");
90e278d3	177	fclose(pf);
759c16b3	178	return 1;
759c16b3	179	}
db09cb3a	180	fclose(pf);
	181	} else {
	182	tag_mem_supplied = false;
	183	}
	184
	185	// Does the tag comes with memory
	186	c.arg[0] = (uint32_t)tag_mem_supplied;
	187
	188	SendCommand(&c);
	189	return 0;
	190	}
	191
	192	int CmdLFHitagReader(const char *Cmd) {
	193	// UsbCommand c = {CMD_READER_HITAG};
	194
	195	// param_get32ex(Cmd,1,0,16);
	196	UsbCommand c = {CMD_READER_HITAG};//, {param_get32ex(Cmd,0,0,10),param_get32ex(Cmd,1,0,16),param_get32ex(Cmd,2,0,16),param_get32ex(Cmd,3,0,16)}};
	197	hitag_data* htd = (hitag_data*)c.d.asBytes;
	198	hitag_function htf = param_get32ex(Cmd,0,0,10);
	199
	200	switch (htf) {
	201	case RHT2F_PASSWORD: {
	202	num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->pwd.password);
	203	} break;
	204	case RHT2F_AUTHENTICATE: {
	205	num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->auth.NrAr);
	206	num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
	207	} break;
bde10a50	208	case RHT2F_CRYPTO: {
	209	num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
	210	// num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
	211	} break;
db09cb3a	212	case RHT2F_TEST_AUTH_ATTEMPTS: {
	213	// No additional parameters needed
	214	} break;
	215	default: {
	216	PrintAndLog("Error: unkown reader function %d",htf);
ab4da50d	217	PrintAndLog("Hitag reader functions");
	218	PrintAndLog(" HitagS (0*)");
	219	PrintAndLog(" Hitag1 (1*)");
	220	PrintAndLog(" Hitag2 (2*)");
	221	PrintAndLog(" 21 <password> (password mode)");
	222	PrintAndLog(" 22 <nr> <ar> (authentication)");
	223	PrintAndLog(" 23 <key> (authentication) key is in format: ISK high + ISK low");
	224	PrintAndLog(" 25 (test recorded authentications)");
db09cb3a	225	return 1;
	226	} break;
	227	}
	228
	229	// Copy the hitag2 function into the first argument
	230	c.arg[0] = htf;
	231
ab4da50d	232	// Send the command to the proxmark
db09cb3a	233	SendCommand(&c);
ab4da50d	234
	235	UsbCommand resp;
	236	WaitForResponse(CMD_ACK,&resp);
	237
	238	// Check the return status, stored in the first argument
	239	if (resp.arg[0] == false) return 1;
	240
	241	uint32_t id = bytes_to_num(resp.d.asBytes,4);
	242	char filename[256];
	243	FILE* pf = NULL;
	244
	245	sprintf(filename,"%08x_%04x.ht2",id,(rand() & 0xffff));
	246	if ((pf = fopen(filename,"wb")) == NULL) {
	247	PrintAndLog("Error: Could not open file [%s]",filename);
	248	return 1;
	249	}
	250
	251	// Write the 48 tag memory bytes to file and finalize
	252	fwrite(resp.d.asBytes,1,48,pf);
	253	fclose(pf);
	254
	255	PrintAndLog("Succesfully saved tag memory to [%s]",filename);
	256
db09cb3a	257	return 0;
	258	}
	259
3fe4ff4f	260	static command_t CommandTable[] =
db09cb3a	261	{
db09cb3a	262	{"help", CmdHelp, 1, "This help"},
b915fda3	263	{"list", CmdLFHitagList, 1, "<outfile> List Hitag trace history"},
db09cb3a	264	{"reader", CmdLFHitagReader, 1, "Act like a Hitag Reader"},
b915fda3	265	{"sim", CmdLFHitagSim, 1, "<infile> Simulate Hitag transponder"},
db09cb3a	266	{"snoop", CmdLFHitagSnoop, 1, "Eavesdrop Hitag communication"},
	267	{NULL, NULL, 0, NULL}
	268	};
	269
	270	int CmdLFHitag(const char *Cmd)
	271	{
3fe4ff4f	272	CmdsParse(CommandTable, Cmd);
db09cb3a	273	return 0;
	274	}
	275
	276	int CmdHelp(const char *Cmd)
	277	{
3fe4ff4f	278	CmdsHelp(CommandTable);
db09cb3a	279	return 0;
db09cb3a	280	}