[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};
	clearCommandBuffer();
	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;

	clearCommandBuffer();
	SendCommand(&c);
	return 0;
}

int CmdLFHitagReader(const char *Cmd) {
	

	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);
		} 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;

	clearCommandBuffer();
	// 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[FILE_PATH_SIZE];
	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
09181a54	62	if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
f71f4deb	63	memcpy(filename, Cmd, len);
b915fda3	64
f71f4deb	65	if (strlen(filename) > 0) {
	66	if ((pf = fopen(filename,"wb")) == NULL) {
	67	PrintAndLog("Error: Could not open file [%s]",filename);
	68	return 1;
	69	}
b915fda3	70	}
db09cb3a	71
f71f4deb	72	for (;;) {
b915fda3	73
ab7bb494	74	if(i >= traceLen) { break; }
f71f4deb	75
	76	bool isResponse;
	77	int timestamp = ((uint32_t )(got+i));
	78	if (timestamp & 0x80000000) {
	79	timestamp &= 0x7fffffff;
	80	isResponse = 1;
	81	} else {
	82	isResponse = 0;
	83	}
	84
	85	int parityBits = ((uint32_t )(got+i+4));
	86	// 4 bytes of additional information...
	87	// maximum of 32 additional parity bit information
	88	//
	89	// TODO:
	90	// at each quarter bit period we can send power level (16 levels)
	91	// or each half bit period in 256 levels.
	92
	93	int bits = got[i+8];
	94	int len = nbytes(got[i+8]);
	95
	96	if (len > 100) {
	97	break;
	98	}
	99	if (i + len > traceLen) { break;}
	100
	101	uint8_t *frame = (got+i+9);
	102
	103	// Break and stick with current result if buffer was not completely full
	104	if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; }
	105
	106	char line[1000] = "";
	107	int j;
	108	for (j = 0; j < len; j++) {
	109	int oddparity = 0x01;
	110	int k;
	111
	112	for (k=0;k<8;k++) {
	113	oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01);
	114	}
	115
	116	//if((parityBits >> (len - j - 1)) & 0x01) {
	117	if (isResponse && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
	118	sprintf(line+(j*4), "%02x! ", frame[j]);
	119	}
	120	else {
	121	sprintf(line+(j*4), "%02x ", frame[j]);
	122	}
	123	}
	124
	125	PrintAndLog(" +%7d: %3d: %s %s",
	126	(prev < 0 ? 0 : (timestamp - prev)),
	127	bits,
	128	(isResponse ? "TAG" : " "),
	129	line);
	130
	131	if (pf) {
	132	fprintf(pf," +%7d: %3d: %s %s\n",
	133	(prev < 0 ? 0 : (timestamp - prev)),
	134	bits,
	135	(isResponse ? "TAG" : " "),
	136	line);
	137	}
	138
139	prev = timestamp;
140	i += (len + 9);
141	}
2d495a81	142
f71f4deb	143	if (pf) {
	144	fclose(pf);
	145	PrintAndLog("Recorded activity succesfully written to file: %s", filename);
	146	}
97d582a6	147
f71f4deb	148	free(got);
f71f4deb	149	return 0;
db09cb3a	150	}
	151
	152	int CmdLFHitagSnoop(const char *Cmd) {
09181a54	153	UsbCommand c = {CMD_SNOOP_HITAG};
	154	clearCommandBuffer();
	155	SendCommand(&c);
	156	return 0;
db09cb3a	157	}
	158
	159	int CmdLFHitagSim(const char *Cmd) {
b915fda3	160
09181a54	161	UsbCommand c = {CMD_SIMULATE_HITAG};
b915fda3	162	char filename[FILE_PATH_SIZE] = { 0x00 };
db09cb3a	163	FILE* pf;
db09cb3a	164	bool tag_mem_supplied;
09181a54	165
b915fda3	166	int len = strlen(Cmd);
	167	if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
	168	memcpy(filename, Cmd, len);
09181a54	169
db09cb3a	170	if (strlen(filename) > 0) {
	171	if ((pf = fopen(filename,"rb+")) == NULL) {
	172	PrintAndLog("Error: Could not open file [%s]",filename);
	173	return 1;
	174	}
	175	tag_mem_supplied = true;
759c16b3	176	if (fread(c.d.asBytes,48,1,pf) == 0) {
09181a54	177	PrintAndLog("Error: File reading error");
09181a54	178	fclose(pf);
759c16b3	179	return 1;
09181a54	180	}
db09cb3a	181	fclose(pf);
	182	} else {
	183	tag_mem_supplied = false;
	184	}
09181a54	185
db09cb3a	186	// Does the tag comes with memory
	187	c.arg[0] = (uint32_t)tag_mem_supplied;
	188
09181a54	189	clearCommandBuffer();
	190	SendCommand(&c);
	191	return 0;
db09cb3a	192	}
	193
	194	int CmdLFHitagReader(const char *Cmd) {
db09cb3a	195
09181a54	196
db09cb3a	197	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)}};
	198	hitag_data* htd = (hitag_data*)c.d.asBytes;
	199	hitag_function htf = param_get32ex(Cmd,0,0,10);
	200
	201	switch (htf) {
	202	case RHT2F_PASSWORD: {
	203	num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->pwd.password);
	204	} break;
	205	case RHT2F_AUTHENTICATE: {
	206	num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->auth.NrAr);
	207	num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
	208	} break;
bde10a50	209	case RHT2F_CRYPTO: {
bde10a50	210	num_to_bytes(param_get64ex(Cmd,1,0,16),6,htd->crypto.key);
bde10a50	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
09181a54	232	clearCommandBuffer();
	233	// Send the command to the proxmark
	234	SendCommand(&c);
ab4da50d	235
09181a54	236	UsbCommand resp;
	237	WaitForResponse(CMD_ACK,&resp);
	238
	239	// Check the return status, stored in the first argument
	240	if (resp.arg[0] == false) return 1;
	241
	242	uint32_t id = bytes_to_num(resp.d.asBytes,4);
	243	char filename[FILE_PATH_SIZE];
	244	FILE* pf = NULL;
	245
	246	sprintf(filename,"%08x_%04x.ht2",id,(rand() & 0xffff));
	247	if ((pf = fopen(filename,"wb")) == NULL) {
	248	PrintAndLog("Error: Could not open file [%s]",filename);
	249	return 1;
	250	}
	251
	252	// Write the 48 tag memory bytes to file and finalize
	253	fwrite(resp.d.asBytes,1,48,pf);
	254	fclose(pf);
	255
	256	PrintAndLog("Succesfully saved tag memory to [%s]",filename);
	257	return 0;
db09cb3a	258	}
db09cb3a	259
09181a54	260	static command_t CommandTable[] = {
	261	{"help", CmdHelp, 1, "This help"},
	262	{"list", CmdLFHitagList, 1, "<outfile> List Hitag trace history"},
	263	{"reader", CmdLFHitagReader, 1, "Act like a Hitag Reader"},
	264	{"sim", CmdLFHitagSim, 1, "<infile> Simulate Hitag transponder"},
	265	{"snoop", CmdLFHitagSnoop, 1, "Eavesdrop Hitag communication"},
	266	{NULL, NULL, 0, NULL}
db09cb3a	267	};
	268
	269	int CmdLFHitag(const char *Cmd)
	270	{
09181a54	271	CmdsParse(CommandTable, Cmd);
09181a54	272	return 0;
db09cb3a	273	}
	274
	275	int CmdHelp(const char *Cmd)
	276	{
09181a54	277	CmdsHelp(CommandTable);
09181a54	278	return 0;
db09cb3a	279	}