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proxmark3/client/cmdlf.c
iceman1001 c71f4da9bc CHG: increased the preamble 
CHG:  from inverted to non-inverted. 2 of the forum samples is non-inverted.

Block 0:  00150080
2016-05-02 21:21:43 +02:00

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//-----------------------------------------------------------------------------
// 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.
//-----------------------------------------------------------------------------
// Low frequency commands
//-----------------------------------------------------------------------------
#include "cmdlf.h"
static int CmdHelp(const char *Cmd);
int usage_lf_cmdread(void) {
PrintAndLog("Usage: lf cmdread d <delay period> z <zero period> o <one period> c <cmdbytes> [H]");
PrintAndLog("Options: ");
PrintAndLog(" h This help");
PrintAndLog(" L Low frequency (125 KHz)");
PrintAndLog(" H High frequency (134 KHz)");
PrintAndLog(" d <delay> delay OFF period, (dec)");
PrintAndLog(" z <zero> time period ZERO, (dec)");
PrintAndLog(" o <one> time period ONE, (dec)");
PrintAndLog(" c <cmd> Command bytes");
PrintAndLog(" ************* All periods in microseconds (ms)");
PrintAndLog("Examples:");
PrintAndLog(" lf cmdread d 80 z 100 o 200 c 11000");
PrintAndLog(" lf cmdread d 80 z 100 o 100 c 11000 H");
return 0;
}
int usage_lf_read(void){
PrintAndLog("Usage: lf read [h] [s]");
PrintAndLog("Options: ");
PrintAndLog(" h This help");
PrintAndLog(" s silent run no printout");
PrintAndLog("This function takes no arguments. ");
PrintAndLog("Use 'lf config' to set parameters.");
return 0;
}
int usage_lf_snoop(void) {
PrintAndLog("Usage: lf snoop");
PrintAndLog("Options: ");
PrintAndLog(" h This help");
PrintAndLog("This function takes no arguments. ");
PrintAndLog("Use 'lf config' to set parameters.");
return 0;
}
int usage_lf_config(void) {
PrintAndLog("Usage: lf config [H|<divisor>] [b <bps>] [d <decim>] [a 0|1]");
PrintAndLog("Options: ");
PrintAndLog(" h This help");
PrintAndLog(" L Low frequency (125 KHz)");
PrintAndLog(" H High frequency (134 KHz)");
PrintAndLog(" q <divisor> Manually set divisor. 88-> 134KHz, 95-> 125 Hz");
PrintAndLog(" b <bps> Sets resolution of bits per sample. Default (max): 8");
PrintAndLog(" d <decim> Sets decimation. A value of N saves only 1 in N samples. Default: 1");
PrintAndLog(" a [0|1] Averaging - if set, will average the stored sample value when decimating. Default: 1");
PrintAndLog(" t <threshold> Sets trigger threshold. 0 means no threshold (range: 0-128)");
PrintAndLog("Examples:");
PrintAndLog(" lf config b 8 L");
PrintAndLog(" Samples at 125KHz, 8bps.");
PrintAndLog(" lf config H b 4 d 3");
PrintAndLog(" Samples at 134KHz, averages three samples into one, stored with ");
PrintAndLog(" a resolution of 4 bits per sample.");
PrintAndLog(" lf read");
PrintAndLog(" Performs a read (active field)");
PrintAndLog(" lf snoop");
PrintAndLog(" Performs a snoop (no active field)");
return 0;
}
int usage_lf_simfsk(void) {
PrintAndLog("Usage: lf simfsk [c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>]");
PrintAndLog("Options: ");
PrintAndLog(" h This help");
PrintAndLog(" c <clock> Manually set clock - can autodetect if using DemodBuffer");
PrintAndLog(" i invert data");
PrintAndLog(" H <fcHigh> Manually set the larger Field Clock");
PrintAndLog(" L <fcLow> Manually set the smaller Field Clock");
//PrintAndLog(" s TBD- -to enable a gap between playback repetitions - default: no gap");
PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
PrintAndLog("\n NOTE: if you set one clock manually set them all manually");
return 0;
}
int usage_lf_simask(void) {
PrintAndLog("Usage: lf simask [c <clock>] [i] [b|m|r] [s] [d <raw hex to sim>]");
PrintAndLog("Options: ");
PrintAndLog(" h This help");
PrintAndLog(" c <clock> Manually set clock - can autodetect if using DemodBuffer");
PrintAndLog(" i invert data");
PrintAndLog(" b sim ask/biphase");
PrintAndLog(" m sim ask/manchester - Default");
PrintAndLog(" r sim ask/raw");
PrintAndLog(" s add t55xx Sequence Terminator gap - default: no gaps (only manchester)");
PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
return 0;
}
int usage_lf_simpsk(void) {
PrintAndLog("Usage: lf simpsk [1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>]");
PrintAndLog("Options: ");
PrintAndLog(" h This help");
PrintAndLog(" c <clock> Manually set clock - can autodetect if using DemodBuffer");
PrintAndLog(" i invert data");
PrintAndLog(" 1 set PSK1 (default)");
PrintAndLog(" 2 set PSK2");
PrintAndLog(" 3 set PSK3");
PrintAndLog(" r <carrier> 2|4|8 are valid carriers: default = 2");
PrintAndLog(" d <hexdata> Data to sim as hex - omit to sim from DemodBuffer");
return 0;
}
int usage_lf_find(void){
PrintAndLog("Usage: lf search <0|1> [u]");
PrintAndLog(" <use data from Graphbuffer> , if not set, try reading data from tag.");
PrintAndLog(" [Search for Unknown tags] , if not set, reads only known tags.");
PrintAndLog("");
PrintAndLog(" sample: lf search = try reading data from tag & search for known tags");
PrintAndLog(" : lf search 1 = use data from GraphBuffer & search for known tags");
PrintAndLog(" : lf search u = try reading data from tag & search for known and unknown tags");
PrintAndLog(" : lf search 1 u = use data from GraphBuffer & search for known and unknown tags");
return 0;
}
/* send a LF command before reading */
int CmdLFCommandRead(const char *Cmd)
{
static char dummy[3] = {0x20,0x00,0x00};
UsbCommand c = {CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K};
bool errors = FALSE;
uint8_t cmdp = 0;
int strLength = 0;
while(param_getchar(Cmd, cmdp) != 0x00) {
switch(param_getchar(Cmd, cmdp))
{
case 'h':
return usage_lf_cmdread();
case 'H':
dummy[1]='h';
cmdp++;
break;
case 'L':
cmdp++;
break;
case 'c':
strLength = param_getstr(Cmd, cmdp+1, (char *)&c.d.asBytes);
cmdp+=2;
break;
case 'd':
c.arg[0] = param_get32ex(Cmd, cmdp+1, 0, 10);
cmdp+=2;
break;
case 'z':
c.arg[1] = param_get32ex(Cmd, cmdp+1, 0, 10);
cmdp+=2;
break;
case 'o':
c.arg[2] = param_get32ex(Cmd, cmdp+1, 0, 10);
cmdp+=2;
break;
default:
PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
errors = 1;
break;
}
if(errors) break;
}
// No args
if (cmdp == 0) errors = 1;
//Validations
if (errors) return usage_lf_cmdread();
// in case they specified 'H'
strcpy((char *)&c.d.asBytes + strLength, dummy);
clearCommandBuffer();
SendCommand(&c);
return 0;
}
int CmdFlexdemod(const char *Cmd)
{
int i;
for (i = 0; i < GraphTraceLen; ++i) {
if (GraphBuffer[i] < 0) {
GraphBuffer[i] = -1;
} else {
GraphBuffer[i] = 1;
}
}
#define LONG_WAIT 100
int start;
for (start = 0; start < GraphTraceLen - LONG_WAIT; start++) {
int first = GraphBuffer[start];
for (i = start; i < start + LONG_WAIT; i++) {
if (GraphBuffer[i] != first) {
break;
}
}
if (i == (start + LONG_WAIT)) {
break;
}
}
if (start == GraphTraceLen - LONG_WAIT) {
PrintAndLog("nothing to wait for");
return 0;
}
GraphBuffer[start] = 2;
GraphBuffer[start+1] = -2;
uint8_t bits[64] = {0x00};
int bit, sum;
i = start;
for (bit = 0; bit < 64; bit++) {
sum = 0;
for (int j = 0; j < 16; j++) {
sum += GraphBuffer[i++];
}
bits[bit] = (sum > 0) ? 1 : 0;
PrintAndLog("bit %d sum %d", bit, sum);
}
for (bit = 0; bit < 64; bit++) {
int j;
int sum = 0;
for (j = 0; j < 16; j++) {
sum += GraphBuffer[i++];
}
if (sum > 0 && bits[bit] != 1) {
PrintAndLog("oops1 at %d", bit);
}
if (sum < 0 && bits[bit] != 0) {
PrintAndLog("oops2 at %d", bit);
}
}
// HACK writing back to graphbuffer.
GraphTraceLen = 32*64;
i = 0;
int phase = 0;
for (bit = 0; bit < 64; bit++) {
phase = (bits[bit] == 0) ? 0 : 1;
int j;
for (j = 0; j < 32; j++) {
GraphBuffer[i++] = phase;
phase = !phase;
}
}
RepaintGraphWindow();
return 0;
}
int CmdIndalaDemod(const char *Cmd)
{
// Usage: recover 64bit UID by default, specify "224" as arg to recover a 224bit UID
int state = -1;
int count = 0;
int i, j;
// worst case with GraphTraceLen=64000 is < 4096
// under normal conditions it's < 2048
uint8_t rawbits[4096];
int rawbit = 0;
int worst = 0, worstPos = 0;
// PrintAndLog("Expecting a bit less than %d raw bits", GraphTraceLen / 32);
// loop through raw signal - since we know it is psk1 rf/32 fc/2 skip every other value (+=2)
for (i = 0; i < GraphTraceLen-1; i += 2) {
count += 1;
if ((GraphBuffer[i] > GraphBuffer[i + 1]) && (state != 1)) {
// appears redundant - marshmellow
if (state == 0) {
for (j = 0; j < count - 8; j += 16) {
rawbits[rawbit++] = 0;
}
if ((abs(count - j)) > worst) {
worst = abs(count - j);
worstPos = i;
}
}
state = 1;
count = 0;
} else if ((GraphBuffer[i] < GraphBuffer[i + 1]) && (state != 0)) {
//appears redundant
if (state == 1) {
for (j = 0; j < count - 8; j += 16) {
rawbits[rawbit++] = 1;
}
if ((abs(count - j)) > worst) {
worst = abs(count - j);
worstPos = i;
}
}
state = 0;
count = 0;
}
}
if ( rawbit>0 ){
PrintAndLog("Recovered %d raw bits, expected: %d", rawbit, GraphTraceLen/32);
PrintAndLog("worst metric (0=best..7=worst): %d at pos %d", worst, worstPos);
} else {
return 0;
}
// Finding the start of a UID
int uidlen, long_wait;
if (strcmp(Cmd, "224") == 0) {
uidlen = 224;
long_wait = 30;
} else {
uidlen = 64;
long_wait = 29;
}
int start;
int first = 0;
for (start = 0; start <= rawbit - uidlen; start++) {
first = rawbits[start];
for (i = start; i < start + long_wait; i++) {
if (rawbits[i] != first) {
break;
}
}
if (i == (start + long_wait)) {
break;
}
}
if (start == rawbit - uidlen + 1) {
PrintAndLog("nothing to wait for");
return 0;
}
// Inverting signal if needed
if (first == 1) {
for (i = start; i < rawbit; i++) {
rawbits[i] = !rawbits[i];
}
}
// Dumping UID
uint8_t bits[224] = {0x00};
char showbits[225] = {0x00};
int bit;
i = start;
int times = 0;
if (uidlen > rawbit) {
PrintAndLog("Warning: not enough raw bits to get a full UID");
for (bit = 0; bit < rawbit; bit++) {
bits[bit] = rawbits[i++];
// As we cannot know the parity, let's use "." and "/"
showbits[bit] = '.' + bits[bit];
}
showbits[bit+1]='\0';
PrintAndLog("Partial UID=%s", showbits);
return 0;
} else {
for (bit = 0; bit < uidlen; bit++) {
bits[bit] = rawbits[i++];
showbits[bit] = '0' + bits[bit];
}
times = 1;
}
//convert UID to HEX
uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
int idx;
uid1 = uid2 = 0;
if (uidlen==64){
for( idx=0; idx<64; idx++) {
if (showbits[idx] == '0') {
uid1 = (uid1<<1) | (uid2>>31);
uid2 = (uid2<<1) | 0;
} else {
uid1 = (uid1<<1) | (uid2>>31);
uid2 = (uid2<<1) | 1;
}
}
PrintAndLog("UID=%s (%x%08x)", showbits, uid1, uid2);
} else {
uid3 = uid4 = uid5 = uid6 = uid7 = 0;
for( idx=0; idx<224; idx++) {
uid1 = (uid1<<1) | (uid2>>31);
uid2 = (uid2<<1) | (uid3>>31);
uid3 = (uid3<<1) | (uid4>>31);
uid4 = (uid4<<1) | (uid5>>31);
uid5 = (uid5<<1) | (uid6>>31);
uid6 = (uid6<<1) | (uid7>>31);
if (showbits[idx] == '0')
uid7 = (uid7<<1) | 0;
else
uid7 = (uid7<<1) | 1;
}
PrintAndLog("UID=%s (%x%08x%08x%08x%08x%08x%08x)", showbits, uid1, uid2, uid3, uid4, uid5, uid6, uid7);
}
// Checking UID against next occurrences
int failed = 0;
for (; i + uidlen <= rawbit;) {
failed = 0;
for (bit = 0; bit < uidlen; bit++) {
if (bits[bit] != rawbits[i++]) {
failed = 1;
break;
}
}
if (failed == 1) {
break;
}
times += 1;
}
PrintAndLog("Occurrences: %d (expected %d)", times, (rawbit - start) / uidlen);
// Remodulating for tag cloning
// HACK: 2015-01-04 this will have an impact on our new way of seening lf commands (demod)
// since this changes graphbuffer data.
GraphTraceLen = 32 * uidlen;
i = 0;
int phase = 0;
for (bit = 0; bit < uidlen; bit++) {
phase = (bits[bit] == 0) ? 0 : 1;
int j;
for (j = 0; j < 32; j++) {
GraphBuffer[i++] = phase;
phase = !phase;
}
}
RepaintGraphWindow();
return 1;
}
int CmdIndalaClone(const char *Cmd)
{
UsbCommand c;
unsigned int uid1, uid2, uid3, uid4, uid5, uid6, uid7;
uid1 = uid2 = uid3 = uid4 = uid5 = uid6 = uid7 = 0;
int n = 0, i = 0;
if (strchr(Cmd,'l') != 0) {
while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
uid1 = (uid1 << 4) | (uid2 >> 28);
uid2 = (uid2 << 4) | (uid3 >> 28);
uid3 = (uid3 << 4) | (uid4 >> 28);
uid4 = (uid4 << 4) | (uid5 >> 28);
uid5 = (uid5 << 4) | (uid6 >> 28);
uid6 = (uid6 << 4) | (uid7 >> 28);
uid7 = (uid7 << 4) | (n & 0xf);
}
PrintAndLog("Cloning 224bit tag with UID %x%08x%08x%08x%08x%08x%08x", uid1, uid2, uid3, uid4, uid5, uid6, uid7);
c.cmd = CMD_INDALA_CLONE_TAG_L;
c.d.asDwords[0] = uid1;
c.d.asDwords[1] = uid2;
c.d.asDwords[2] = uid3;
c.d.asDwords[3] = uid4;
c.d.asDwords[4] = uid5;
c.d.asDwords[5] = uid6;
c.d.asDwords[6] = uid7;
} else {
while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
uid1 = (uid1 << 4) | (uid2 >> 28);
uid2 = (uid2 << 4) | (n & 0xf);
}
PrintAndLog("Cloning 64bit tag with UID %x%08x", uid1, uid2);
c.cmd = CMD_INDALA_CLONE_TAG;
c.arg[0] = uid1;
c.arg[1] = uid2;
}
clearCommandBuffer();
SendCommand(&c);
return 0;
}
int CmdLFSetConfig(const char *Cmd)
{
uint8_t divisor = 0;//Frequency divisor
uint8_t bps = 0; // Bits per sample
uint8_t decimation = 0; //How many to keep
bool averaging = 1; // Defaults to true
bool errors = FALSE;
int trigger_threshold = -1;//Means no change
uint8_t unsigned_trigg = 0;
uint8_t cmdp = 0;
while(param_getchar(Cmd, cmdp) != 0x00)
{
switch(param_getchar(Cmd, cmdp))
{
case 'h':
return usage_lf_config();
case 'H':
divisor = 88;
cmdp++;
break;
case 'L':
divisor = 95;
cmdp++;
break;
case 'q':
errors |= param_getdec(Cmd,cmdp+1,&divisor);
cmdp+=2;
break;
case 't':
errors |= param_getdec(Cmd,cmdp+1,&unsigned_trigg);
cmdp+=2;
if(!errors) trigger_threshold = unsigned_trigg;
break;
case 'b':
errors |= param_getdec(Cmd,cmdp+1,&bps);
cmdp+=2;
break;
case 'd':
errors |= param_getdec(Cmd,cmdp+1,&decimation);
cmdp+=2;
break;
case 'a':
averaging = param_getchar(Cmd,cmdp+1) == '1';
cmdp+=2;
break;
default:
PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
errors = 1;
break;
}
if(errors) break;
}
// No args
if (cmdp == 0) errors = 1;
//Validations
if (errors) return usage_lf_config();
//Bps is limited to 8, so fits in lower half of arg1
if (bps >> 4) bps = 8;
sample_config config = { decimation, bps, averaging, divisor, trigger_threshold };
//Averaging is a flag on high-bit of arg[1]
UsbCommand c = {CMD_SET_LF_SAMPLING_CONFIG};
memcpy(c.d.asBytes,&config,sizeof(sample_config));
clearCommandBuffer();
SendCommand(&c);
return 0;
}
int CmdLFRead(const char *Cmd)
{
bool arg1 = false;
uint8_t cmdp = param_getchar(Cmd, 0);
if ( cmdp == 'h' || cmdp == 'H') return usage_lf_read();
//suppress print
if ( cmdp == 's' || cmdp == 'S') arg1 = true;
UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_125K, {arg1,0,0}};
clearCommandBuffer();
SendCommand(&c);
if ( !WaitForResponseTimeout(CMD_ACK,NULL,2500) ) {
PrintAndLog("command execution time out");
return 1;
}
return 0;
}
int CmdLFSnoop(const char *Cmd)
{
uint8_t cmdp = param_getchar(Cmd, 0);
if(cmdp == 'h' || cmdp == 'H') return usage_lf_snoop();
UsbCommand c = {CMD_LF_SNOOP_RAW_ADC_SAMPLES};
clearCommandBuffer();
SendCommand(&c);
WaitForResponse(CMD_ACK,NULL);
return 0;
}
static void ChkBitstream(const char *str)
{
int i;
/* convert to bitstream if necessary */
for (i = 0; i < (int)(GraphTraceLen / 2); i++){
if (GraphBuffer[i] > 1 || GraphBuffer[i] < 0) {
CmdGetBitStream("");
break;
}
}
}
//Attempt to simulate any wave in buffer (one bit per output sample)
// converts GraphBuffer to bitstream (based on zero crossings) if needed.
int CmdLFSim(const char *Cmd)
{
int i,j;
static int gap;
sscanf(Cmd, "%i", &gap);
// convert to bitstream if necessary
ChkBitstream(Cmd);
//can send only 512 bits at a time (1 byte sent per bit...)
printf("Sending [%d bytes]", GraphTraceLen);
for (i = 0; i < GraphTraceLen; i += USB_CMD_DATA_SIZE) {
UsbCommand c = {CMD_DOWNLOADED_SIM_SAMPLES_125K, {i, 0, 0}};
for (j = 0; j < USB_CMD_DATA_SIZE; j++) {
c.d.asBytes[j] = GraphBuffer[i+j];
}
clearCommandBuffer();
SendCommand(&c);
WaitForResponse(CMD_ACK,NULL);
printf(".");
}
PrintAndLog("\nStarting to simulate");
UsbCommand c = {CMD_SIMULATE_TAG_125K, {GraphTraceLen, gap, 0}};
clearCommandBuffer();
SendCommand(&c);
return 0;
}
// by marshmellow - sim ask data given clock, fcHigh, fcLow, invert
// - allow pull data from DemodBuffer
int CmdLFfskSim(const char *Cmd)
{
//might be able to autodetect FCs and clock from Graphbuffer if using demod buffer
// otherwise will need FChigh, FClow, Clock, and bitstream
uint8_t fcHigh=0, fcLow=0, clk=0;
uint8_t invert=0;
bool errors = FALSE;
char hexData[32] = {0x00}; // store entered hex data
uint8_t data[255] = {0x00};
int dataLen = 0;
uint8_t cmdp = 0;
while(param_getchar(Cmd, cmdp) != 0x00)
{
switch(param_getchar(Cmd, cmdp))
{
case 'h':
return usage_lf_simfsk();
case 'i':
invert = 1;
cmdp++;
break;
case 'c':
errors |= param_getdec(Cmd,cmdp+1,&clk);
cmdp+=2;
break;
case 'H':
errors |= param_getdec(Cmd,cmdp+1,&fcHigh);
cmdp+=2;
break;
case 'L':
errors |= param_getdec(Cmd,cmdp+1,&fcLow);
cmdp+=2;
break;
//case 's':
// separator=1;
// cmdp++;
// break;
case 'd':
dataLen = param_getstr(Cmd, cmdp+1, hexData);
if (dataLen==0) {
errors=TRUE;
} else {
dataLen = hextobinarray((char *)data, hexData);
}
if (dataLen==0) errors=TRUE;
if (errors) PrintAndLog ("Error getting hex data");
cmdp+=2;
break;
default:
PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
errors = TRUE;
break;
}
if(errors) break;
}
if(cmdp == 0 && DemodBufferLen == 0)
{
errors = TRUE;// No args
}
//Validations
if(errors)
{
return usage_lf_simfsk();
}
if (dataLen == 0){ //using DemodBuffer
if (clk==0 || fcHigh==0 || fcLow==0){ //manual settings must set them all
uint8_t ans = fskClocks(&fcHigh, &fcLow, &clk, 0);
if (ans==0){
if (!fcHigh) fcHigh=10;
if (!fcLow) fcLow=8;
if (!clk) clk=50;
}
}
} else {
setDemodBuf(data, dataLen, 0);
}
//default if not found
if (clk == 0) clk = 50;
if (fcHigh == 0) fcHigh = 10;
if (fcLow == 0) fcLow = 8;
uint16_t arg1, arg2;
arg1 = fcHigh << 8 | fcLow;
arg2 = invert << 8 | clk;
size_t size = DemodBufferLen;
if (size > USB_CMD_DATA_SIZE) {
PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
size = USB_CMD_DATA_SIZE;
}
UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
memcpy(c.d.asBytes, DemodBuffer, size);
clearCommandBuffer();
SendCommand(&c);
return 0;
}
// by marshmellow - sim ask data given clock, invert, manchester or raw, separator
// - allow pull data from DemodBuffer
int CmdLFaskSim(const char *Cmd)
{
//autodetect clock from Graphbuffer if using demod buffer
// needs clock, invert, manchester/raw as m or r, separator as s, and bitstream
uint8_t encoding = 1, separator = 0, clk=0, invert=0;
bool errors = FALSE;
char hexData[32] = {0x00};
uint8_t data[255]= {0x00}; // store entered hex data
int dataLen = 0;
uint8_t cmdp = 0;
while(param_getchar(Cmd, cmdp) != 0x00) {
switch(param_getchar(Cmd, cmdp)) {
case 'h': return usage_lf_simask();
case 'i':
invert = 1;
cmdp++;
break;
case 'c':
errors |= param_getdec(Cmd,cmdp+1,&clk);
cmdp+=2;
break;
case 'b':
encoding=2; //biphase
cmdp++;
break;
case 'm':
encoding=1;
cmdp++;
break;
case 'r':
encoding=0;
cmdp++;
break;
case 's':
separator=1;
cmdp++;
break;
case 'd':
dataLen = param_getstr(Cmd, cmdp+1, hexData);
if (dataLen==0)
errors = TRUE;
else
dataLen = hextobinarray((char *)data, hexData);
if (dataLen==0) errors = TRUE;
if (errors) PrintAndLog ("Error getting hex data, datalen: %d", dataLen);
cmdp+=2;
break;
default:
PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
errors = TRUE;
break;
}
if(errors) break;
}
if(cmdp == 0 && DemodBufferLen == 0)
errors = TRUE;// No args
//Validations
if(errors) return usage_lf_simask();
if (dataLen == 0){ //using DemodBuffer
if (clk == 0)
clk = GetAskClock("0", false, false);
} else {
setDemodBuf(data, dataLen, 0);
}
if (clk == 0) clk = 64;
if (encoding == 0) clk = clk/2; //askraw needs to double the clock speed
size_t size = DemodBufferLen;
if (size > USB_CMD_DATA_SIZE) {
PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
size = USB_CMD_DATA_SIZE;
}
PrintAndLog("preparing to sim ask data: %d bits", size);
uint16_t arg1, arg2;
arg1 = clk << 8 | encoding;
arg2 = invert << 8 | separator;
UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
memcpy(c.d.asBytes, DemodBuffer, size);
clearCommandBuffer();
SendCommand(&c);
return 0;
}
// by marshmellow - sim psk data given carrier, clock, invert
// - allow pull data from DemodBuffer or parameters
int CmdLFpskSim(const char *Cmd)
{
//might be able to autodetect FC and clock from Graphbuffer if using demod buffer
//will need carrier, Clock, and bitstream
uint8_t carrier=0, clk=0;
uint8_t invert=0;
bool errors = FALSE;
char hexData[32] = {0x00}; // store entered hex data
uint8_t data[255] = {0x00};
int dataLen = 0;
uint8_t cmdp = 0;
uint8_t pskType = 1;
while(param_getchar(Cmd, cmdp) != 0x00)
{
switch(param_getchar(Cmd, cmdp))
{
case 'h':
return usage_lf_simpsk();
case 'i':
invert = 1;
cmdp++;
break;
case 'c':
errors |= param_getdec(Cmd,cmdp+1,&clk);
cmdp+=2;
break;
case 'r':
errors |= param_getdec(Cmd,cmdp+1,&carrier);
cmdp+=2;
break;
case '1':
pskType=1;
cmdp++;
break;
case '2':
pskType=2;
cmdp++;
break;
case '3':
pskType=3;
cmdp++;
break;
case 'd':
dataLen = param_getstr(Cmd, cmdp+1, hexData);
if (dataLen==0) {
errors=TRUE;
} else {
dataLen = hextobinarray((char *)data, hexData);
}
if (dataLen==0) errors=TRUE;
if (errors) PrintAndLog ("Error getting hex data");
cmdp+=2;
break;
default:
PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
errors = TRUE;
break;
}
if (errors) break;
}
if (cmdp == 0 && DemodBufferLen == 0)
{
errors = TRUE;// No args
}
//Validations
if (errors)
{
return usage_lf_simpsk();
}
if (dataLen == 0){ //using DemodBuffer
PrintAndLog("Getting Clocks");
if (clk==0) clk = GetPskClock("", FALSE, FALSE);
PrintAndLog("clk: %d",clk);
if (!carrier) carrier = GetPskCarrier("", FALSE, FALSE);
PrintAndLog("carrier: %d", carrier);
} else {
setDemodBuf(data, dataLen, 0);
}
if (clk <= 0) clk = 32;
if (carrier == 0) carrier = 2;
if (pskType != 1){
if (pskType == 2){
//need to convert psk2 to psk1 data before sim
psk2TOpsk1(DemodBuffer, DemodBufferLen);
} else {
PrintAndLog("Sorry, PSK3 not yet available");
}
}
uint16_t arg1, arg2;
arg1 = clk << 8 | carrier;
arg2 = invert;
size_t size=DemodBufferLen;
if (size > USB_CMD_DATA_SIZE) {
PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
size=USB_CMD_DATA_SIZE;
}
UsbCommand c = {CMD_PSK_SIM_TAG, {arg1, arg2, size}};
PrintAndLog("DEBUG: Sending DemodBuffer Length: %d", size);
memcpy(c.d.asBytes, DemodBuffer, size);
clearCommandBuffer();
SendCommand(&c);
return 0;
}
int CmdLFSimBidir(const char *Cmd)
{
// Set ADC to twice the carrier for a slight supersampling
// HACK: not implemented in ARMSRC.
PrintAndLog("Not implemented yet.");
UsbCommand c = {CMD_LF_SIMULATE_BIDIR, {47, 384, 0}};
SendCommand(&c);
return 0;
}
int CmdVchDemod(const char *Cmd)
{
// Is this the entire sync pattern, or does this also include some
// data bits that happen to be the same everywhere? That would be
// lovely to know.
static const int SyncPattern[] = {
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
};
// So first, we correlate for the sync pattern, and mark that.
int bestCorrel = 0, bestPos = 0;
int i;
// It does us no good to find the sync pattern, with fewer than
// 2048 samples after it...
for (i = 0; i < (GraphTraceLen-2048); i++) {
int sum = 0;
int j;
for (j = 0; j < arraylen(SyncPattern); j++) {
sum += GraphBuffer[i+j]*SyncPattern[j];
}
if (sum > bestCorrel) {
bestCorrel = sum;
bestPos = i;
}
}
PrintAndLog("best sync at %d [metric %d]", bestPos, bestCorrel);
char bits[257];
bits[256] = '\0';
int worst = INT_MAX;
int worstPos = 0;
for (i = 0; i < 2048; i += 8) {
int sum = 0;
int j;
for (j = 0; j < 8; j++) {
sum += GraphBuffer[bestPos+i+j];
}
if (sum < 0) {
bits[i/8] = '.';
} else {
bits[i/8] = '1';
}
if(abs(sum) < worst) {
worst = abs(sum);
worstPos = i;
}
}
PrintAndLog("bits:");
PrintAndLog("%s", bits);
PrintAndLog("worst metric: %d at pos %d", worst, worstPos);
if (strcmp(Cmd, "clone")==0) {
GraphTraceLen = 0;
char *s;
for(s = bits; *s; s++) {
int j;
for(j = 0; j < 16; j++) {
GraphBuffer[GraphTraceLen++] = (*s == '1') ? 1 : 0;
}
}
RepaintGraphWindow();
}
return 0;
}
//by marshmellow
int CmdLFfind(const char *Cmd) {
int ans = 0;
char cmdp = param_getchar(Cmd, 0);
char testRaw = param_getchar(Cmd, 1);
if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') return usage_lf_find();
if (!offline && (cmdp != '1')){
CmdLFRead("s");
getSamples("30000",false);
} else if (GraphTraceLen < 1000) {
PrintAndLog("Data in Graphbuffer was too small.");
return 0;
}
if (cmdp == 'u' || cmdp == 'U') testRaw = 'u';
PrintAndLog("NOTE: some demods output possible binary\n if it finds something that looks like a tag");
PrintAndLog("False Positives ARE possible\n");
PrintAndLog("\nChecking for known tags:\n");
ans=CmdFSKdemodIO("");
if (ans>0) {
PrintAndLog("\nValid IO Prox ID Found!");
return 1;
}
ans=CmdFSKdemodPyramid("");
if (ans>0) {
PrintAndLog("\nValid Pyramid ID Found!");
return 1;
}
ans=CmdFSKdemodParadox("");
if (ans>0) {
PrintAndLog("\nValid Paradox ID Found!");
return 1;
}
ans=CmdFSKdemodAWID("");
if (ans>0) {
PrintAndLog("\nValid AWID ID Found!");
return 1;
}
ans=CmdFSKdemodHID("");
if (ans>0) {
PrintAndLog("\nValid HID Prox ID Found!");
return 1;
}
ans=CmdAskEM410xDemod("");
if (ans>0) {
PrintAndLog("\nValid EM410x ID Found!");
return 1;
}
ans=CmdG_Prox_II_Demod("");
if (ans>0) {
PrintAndLog("\nValid Guardall G-Prox II ID Found!");
return 1;
}
ans=CmdFDXBdemodBI("");
if (ans>0) {
PrintAndLog("\nValid FDX-B ID Found!");
return 1;
}
ans=EM4x50Read("", false);
if (ans>0) {
PrintAndLog("\nValid EM4x50 ID Found!");
return 1;
}
ans=CmdVikingDemod("");
if (ans>0) {
PrintAndLog("\nValid Viking ID Found!");
return 1;
}
ans=CmdIndalaDecode("");
if (ans>0) {
PrintAndLog("\nValid Indala ID Found!");
return 1;
}
ans=CmdPSKNexWatch("");
if (ans>0) {
PrintAndLog("\nValid NexWatch ID Found!");
return 1;
}
ans=CmdLFNedapDemod("");
if (ans>0) {
PrintAndLog("\nValid NEDAP ID Found!");
return 1;
}
// TIdemod?
PrintAndLog("\nNo Known Tags Found!\n");
if (testRaw=='u' || testRaw=='U'){
//test unknown tag formats (raw mode)
PrintAndLog("\nChecking for Unknown tags:\n");
ans=AutoCorrelate(4000, FALSE, FALSE);
if (ans > 0) {
PrintAndLog("Possible Auto Correlation of %d repeating samples",ans);
if ( ans % 8 == 0) {
int bytes = (ans / 8);
PrintAndLog("Possible %d bytes", bytes);
int blocks = 0;
if ( bytes % 2 == 0) {
blocks = (bytes / 2);
PrintAndLog("Possible 2 blocks, width %d", blocks);
}
if ( bytes % 4 == 0) {
blocks = (bytes / 4);
PrintAndLog("Possible 4 blocks, width %d", blocks);
}
if ( bytes % 8 == 0) {
blocks = (bytes / 8);
PrintAndLog("Possible 8 blocks, width %d", blocks);
}
if ( bytes % 16 == 0) {
blocks = (bytes / 16);
PrintAndLog("Possible 16 blocks, width %d", blocks);
}
}
}
ans=GetFskClock("",FALSE,FALSE);
if (ans != 0){ //fsk
ans=FSKrawDemod("",TRUE);
if (ans>0) {
PrintAndLog("\nUnknown FSK Modulated Tag Found!");
return 1;
}
}
bool st = TRUE;
ans=ASKDemod_ext("0 0 0",TRUE,FALSE,1,&st);
if (ans>0) {
PrintAndLog("\nUnknown ASK Modulated and Manchester encoded Tag Found!");
PrintAndLog("\nif it does not look right it could instead be ASK/Biphase - try 'data rawdemod ab'");
return 1;
}
ans=CmdPSK1rawDemod("");
if (ans>0) {
PrintAndLog("Possible unknown PSK1 Modulated Tag Found above!\n\nCould also be PSK2 - try 'data rawdemod p2'");
PrintAndLog("\nCould also be PSK3 - [currently not supported]");
PrintAndLog("\nCould also be NRZ - try 'data nrzrawdemod");
return 1;
}
PrintAndLog("\nNo Data Found!\n");
}
return 0;
}
static command_t CommandTable[] =
{
{"help", CmdHelp, 1, "This help"},
{"awid", CmdLFAWID, 1, "{ AWID RFIDs... }"},
{"em4x", CmdLFEM4X, 1, "{ EM4X RFIDs... }"},
{"guard", CmdLFGuard, 1, "{ Guardall RFIDs... }"},
{"hid", CmdLFHID, 1, "{ HID RFIDs... }"},
{"hitag", CmdLFHitag, 1, "{ HITAG RFIDs... }"},
{"io", CmdLFIO, 1, "{ IOPROX RFIDs... }"},
{"nedap", CmdLFNedap, 1, "{ NEDAP RFIDs... }"},
{"pcf7931", CmdLFPCF7931, 1, "{ PCF7931 RFIDs... }"},
{"presco", CmdLFPresco, 1, "{ Presco RFIDs... }"},
{"pyramid", CmdLFPyramid, 1, "{ Farpointe/Pyramid RFIDs... }"},
{"ti", CmdLFTI, 1, "{ TI RFIDs... }"},
{"t55xx", CmdLFT55XX, 1, "{ T55xx RFIDs... }"},
{"viking", CmdLFViking, 1, "{ Viking RFIDs... }"},
{"config", CmdLFSetConfig, 0, "Set config for LF sampling, bit/sample, decimation, frequency"},
{"cmdread", CmdLFCommandRead, 0, "<off period> <'0' period> <'1' period> <command> ['h' 134] \n\t\t-- Modulate LF reader field to send command before read (all periods in microseconds)"},
{"flexdemod", CmdFlexdemod, 1, "Demodulate samples for FlexPass"},
{"indalademod", CmdIndalaDemod, 1, "['224'] -- Demodulate samples for Indala 64 bit UID (option '224' for 224 bit)"},
{"indalaclone", CmdIndalaClone, 0, "<UID> ['l']-- Clone Indala to T55x7 (tag must be in antenna)(UID in HEX)(option 'l' for 224 UID"},
{"read", CmdLFRead, 0, "['s' silent] Read 125/134 kHz LF ID-only tag. Do 'lf read h' for help"},
{"search", CmdLFfind, 1, "[offline] ['u'] Read and Search for valid known tag (in offline mode it you can load first then search) \n\t\t-- 'u' to search for unknown tags"},
{"sim", CmdLFSim, 0, "[GAP] -- Simulate LF tag from buffer with optional GAP (in microseconds)"},
{"simask", CmdLFaskSim, 0, "[clock] [invert <1|0>] [biphase/manchester/raw <'b'|'m'|'r'>] [msg separator 's'] [d <hexdata>] \n\t\t-- Simulate LF ASK tag from demodbuffer or input"},
{"simfsk", CmdLFfskSim, 0, "[c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>] \n\t\t-- Simulate LF FSK tag from demodbuffer or input"},
{"simpsk", CmdLFpskSim, 0, "[1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>] \n\t\t-- Simulate LF PSK tag from demodbuffer or input"},
{"simbidir", CmdLFSimBidir, 0, "Simulate LF tag (with bidirectional data transmission between reader and tag)"},
{"snoop", CmdLFSnoop, 0, "['l'|'h'|<divisor>] [trigger threshold]-- Snoop LF (l:125khz, h:134khz)"},
{"vchdemod", CmdVchDemod, 1, "['clone'] -- Demodulate samples for VeriChip"},
{NULL, NULL, 0, NULL}
};
int CmdLF(const char *Cmd) {
clearCommandBuffer();
CmdsParse(CommandTable, Cmd);
return 0;
}
int CmdHelp(const char *Cmd) {
CmdsHelp(CommandTable);
return 0;
}
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