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proxmark3/client/cmddata.c
marshmellow42 5bce72d5e3 split lf paradox/nexwatch into own files 
see changelog.md for cli changes!
2017-03-27 18:04:20 -04:00

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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.
//-----------------------------------------------------------------------------
// Data and Graph commands
//-----------------------------------------------------------------------------
#include <stdio.h> // also included in util.h
#include <string.h> // also included in util.h
#include <inttypes.h>
#include <limits.h> // for CmdNorm INT_MIN && INT_MAX
#include "data.h" // also included in util.h
#include "cmddata.h"
#include "util.h"
#include "cmdmain.h"
#include "proxmark3.h"
#include "ui.h" // for show graph controls
#include "graph.h" // for graph data
#include "cmdparser.h"// already included in cmdmain.h
#include "usb_cmd.h" // already included in cmdmain.h and proxmark3.h
#include "lfdemod.h" // for demod code
#include "crc.h" // for pyramid checksum maxim
#include "crc16.h" // for FDXB demod checksum
#include "loclass/cipherutils.h" // for decimating samples in getsamples
#include "cmdlfem4x.h"// for em410x demod
uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
uint8_t g_debugMode=0;
size_t DemodBufferLen=0;
//size_t g_demodStartIdx=0;
//uint8_t g_demodClock=0;
static int CmdHelp(const char *Cmd);
//set the demod buffer with given array of binary (one bit per byte)
//by marshmellow
void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
{
if (buff == NULL)
return;
if ( size >= MAX_DEMOD_BUF_LEN)
size = MAX_DEMOD_BUF_LEN;
size_t i = 0;
for (; i < size; i++){
DemodBuffer[i]=buff[startIdx++];
}
DemodBufferLen=size;
return;
}
int CmdSetDebugMode(const char *Cmd)
{
int demod=0;
sscanf(Cmd, "%i", &demod);
g_debugMode=(uint8_t)demod;
return 1;
}
int usage_data_printdemodbuf(){
PrintAndLog("Usage: data printdemodbuffer x o <offset> l <length>");
PrintAndLog("Options: ");
PrintAndLog(" h This help");
PrintAndLog(" x output in hex (omit for binary output)");
PrintAndLog(" o <offset> enter offset in # of bits");
PrintAndLog(" l <length> enter length to print in # of bits or hex characters respectively");
return 0;
}
//by marshmellow
void printDemodBuff(void)
{
int bitLen = DemodBufferLen;
if (bitLen<1) {
PrintAndLog("no bits found in demod buffer");
return;
}
if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty
char *bin = sprint_bin_break(DemodBuffer,bitLen,16);
PrintAndLog("%s",bin);
return;
}
int CmdPrintDemodBuff(const char *Cmd)
{
char hex[512]={0x00};
bool hexMode = false;
bool errors = false;
uint32_t offset = 0; //could be size_t but no param_get16...
uint32_t length = 512;
char cmdp = 0;
while(param_getchar(Cmd, cmdp) != 0x00)
{
switch(param_getchar(Cmd, cmdp))
{
case 'h':
case 'H':
return usage_data_printdemodbuf();
case 'x':
case 'X':
hexMode = true;
cmdp++;
break;
case 'o':
case 'O':
offset = param_get32ex(Cmd, cmdp+1, 0, 10);
if (!offset) errors = true;
cmdp += 2;
break;
case 'l':
case 'L':
length = param_get32ex(Cmd, cmdp+1, 512, 10);
if (!length) errors = true;
cmdp += 2;
break;
default:
PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
errors = true;
break;
}
if(errors) break;
}
//Validations
if(errors) return usage_data_printdemodbuf();
length = (length > (DemodBufferLen-offset)) ? DemodBufferLen-offset : length;
int numBits = (length) & 0x00FFC; //make sure we don't exceed our string
if (hexMode){
char *buf = (char *) (DemodBuffer + offset);
numBits = (numBits > sizeof(hex)) ? sizeof(hex) : numBits;
numBits = binarraytohex(hex, buf, numBits);
if (numBits==0) return 0;
PrintAndLog("DemodBuffer: %s",hex);
} else {
PrintAndLog("DemodBuffer:\n%s", sprint_bin_break(DemodBuffer+offset,numBits,16));
}
return 1;
}
//by marshmellow
//this function strictly converts >1 to 1 and <1 to 0 for each sample in the graphbuffer
int CmdGetBitStream(const char *Cmd)
{
int i;
CmdHpf(Cmd);
for (i = 0; i < GraphTraceLen; i++) {
if (GraphBuffer[i] >= 1) {
GraphBuffer[i] = 1;
} else {
GraphBuffer[i] = 0;
}
}
RepaintGraphWindow();
return 0;
}
//by marshmellow
//Cmd Args: Clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
// (amp may not be needed anymore)
//verbose will print results and demoding messages
//emSearch will auto search for EM410x format in bitstream
//askType switches decode: ask/raw = 0, ask/manchester = 1
int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, bool *stCheck) {
int invert=0;
int clk=0;
int maxErr=100;
int maxLen=0;
uint8_t askamp = 0;
char amp = param_getchar(Cmd, 0);
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
sscanf(Cmd, "%i %i %i %i %c", &clk, &invert, &maxErr, &maxLen, &amp);
if (!maxLen) maxLen = BIGBUF_SIZE;
if (invert != 0 && invert != 1) {
PrintAndLog("Invalid argument: %s", Cmd);
return 0;
}
if (clk==1){
invert=1;
clk=0;
}
size_t BitLen = getFromGraphBuf(BitStream);
if (g_debugMode) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
if (BitLen < 255) return 0;
if (maxLen < BitLen && maxLen != 0) BitLen = maxLen;
int foundclk = 0;
//amp before ST check
if (amp == 'a' || amp == 'A') {
askAmp(BitStream, BitLen);
}
bool st = false;
size_t ststart = 0, stend = 0;
if (*stCheck) st = DetectST_ext(BitStream, &BitLen, &foundclk, &ststart, &stend);
if (st) {
*stCheck = st;
clk = (clk == 0) ? foundclk : clk;
CursorCPos = ststart;
CursorDPos = stend;
if (verbose || g_debugMode) PrintAndLog("\nFound Sequence Terminator - First one is shown by orange and blue graph markers");
}
int errCnt = askdemod(BitStream, &BitLen, &clk, &invert, maxErr, askamp, askType);
if (errCnt<0 || BitLen<16){ //if fatal error (or -1)
if (g_debugMode) PrintAndLog("DEBUG: no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
return 0;
}
if (errCnt > maxErr){
if (g_debugMode) PrintAndLog("DEBUG: Too many errors found, errors:%d, bits:%d, clock:%d",errCnt, BitLen, clk);
return 0;
}
if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen);
//output
setDemodBuf(BitStream,BitLen,0);
if (verbose || g_debugMode){
if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);
else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);
// Now output the bitstream to the scrollback by line of 16 bits
printDemodBuff();
}
uint64_t lo = 0;
uint32_t hi = 0;
if (emSearch){
AskEm410xDecode(true, &hi, &lo);
}
return 1;
}
int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType) {
bool st = false;
return ASKDemod_ext(Cmd, verbose, emSearch, askType, &st);
}
//by marshmellow
//takes 5 arguments - clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
//attempts to demodulate ask while decoding manchester
//prints binary found and saves in graphbuffer for further commands
int Cmdaskmandemod(const char *Cmd)
{
char cmdp = param_getchar(Cmd, 0);
if (strlen(Cmd) > 45 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: data rawdemod am <s> [clock] <invert> [maxError] [maxLen] [amplify]");
PrintAndLog(" ['s'] optional, check for Sequence Terminator");
PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
PrintAndLog(" <invert>, 1 to invert output");
PrintAndLog(" [set maximum allowed errors], default = 100");
PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
PrintAndLog("");
PrintAndLog(" sample: data rawdemod am = demod an ask/manchester tag from GraphBuffer");
PrintAndLog(" : data rawdemod am 32 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32");
PrintAndLog(" : data rawdemod am 32 1 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32 and inverting data");
PrintAndLog(" : data rawdemod am 1 = demod an ask/manchester tag from GraphBuffer while inverting data");
PrintAndLog(" : data rawdemod am 64 1 0 = demod an ask/manchester tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
return 0;
}
bool st = true;
if (Cmd[0]=='s')
return ASKDemod_ext(Cmd++, true, true, 1, &st);
else if (Cmd[1] == 's')
return ASKDemod_ext(Cmd+=2, true, true, 1, &st);
else
return ASKDemod(Cmd, true, true, 1);
}
//by marshmellow
//manchester decode
//stricktly take 10 and 01 and convert to 0 and 1
int Cmdmandecoderaw(const char *Cmd)
{
int i =0;
int errCnt=0;
size_t size=0;
int invert=0;
int maxErr = 20;
char cmdp = param_getchar(Cmd, 0);
if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: data manrawdecode [invert] [maxErr]");
PrintAndLog(" Takes 10 and 01 and converts to 0 and 1 respectively");
PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
PrintAndLog(" [invert] invert output");
PrintAndLog(" [maxErr] set number of errors allowed (default = 20)");
PrintAndLog("");
PrintAndLog(" sample: data manrawdecode = decode manchester bitstream from the demodbuffer");
return 0;
}
if (DemodBufferLen==0) return 0;
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
int high=0,low=0;
for (;i<DemodBufferLen;++i){
if (DemodBuffer[i]>high) high=DemodBuffer[i];
else if(DemodBuffer[i]<low) low=DemodBuffer[i];
BitStream[i]=DemodBuffer[i];
}
if (high>7 || low <0 ){
PrintAndLog("Error: please raw demod the wave first then manchester raw decode");
return 0;
}
sscanf(Cmd, "%i %i", &invert, &maxErr);
size=i;
uint8_t alignPos = 0;
errCnt=manrawdecode(BitStream, &size, invert, &alignPos);
if (errCnt>=maxErr){
PrintAndLog("Too many errors: %d",errCnt);
return 0;
}
PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
if (errCnt==0){
uint64_t id = 0;
uint32_t hi = 0;
size_t idx=0;
if (Em410xDecode(BitStream, &size, &idx, &hi, &id)){
//need to adjust to set bitstream back to manchester encoded data
//setDemodBuf(BitStream, size, idx);
printEM410x(hi, id);
}
}
return 1;
}
//by marshmellow
//biphase decode
//take 01 or 10 = 0 and 11 or 00 = 1
//takes 2 arguments "offset" default = 0 if 1 it will shift the decode by one bit
// and "invert" default = 0 if 1 it will invert output
// the argument offset allows us to manually shift if the output is incorrect - [EDIT: now auto detects]
int CmdBiphaseDecodeRaw(const char *Cmd)
{
size_t size=0;
int offset=0, invert=0, maxErr=20, errCnt=0;
char cmdp = param_getchar(Cmd, 0);
if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: data biphaserawdecode [offset] [invert] [maxErr]");
PrintAndLog(" Converts 10 or 01 to 1 and 11 or 00 to 0");
PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
PrintAndLog(" --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
PrintAndLog("");
PrintAndLog(" [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position");
PrintAndLog(" [invert <0|1>], set to 1 to invert output");
PrintAndLog(" [maxErr int], set max errors tolerated - default=20");
PrintAndLog("");
PrintAndLog(" sample: data biphaserawdecode = decode biphase bitstream from the demodbuffer");
PrintAndLog(" sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output");
return 0;
}
sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr);
if (DemodBufferLen==0){
PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first");
return 0;
}
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
memcpy(BitStream, DemodBuffer, DemodBufferLen);
size = DemodBufferLen;
errCnt=BiphaseRawDecode(BitStream, &size, offset, invert);
if (errCnt<0){
PrintAndLog("Error during decode:%d", errCnt);
return 0;
}
if (errCnt>maxErr){
PrintAndLog("Too many errors attempting to decode: %d",errCnt);
return 0;
}
if (errCnt>0){
PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);
}
PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);
PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset); //remove first bit from raw demod
return 1;
}
//by marshmellow
// - ASK Demod then Biphase decode GraphBuffer samples
int ASKbiphaseDemod(const char *Cmd, bool verbose)
{
//ask raw demod GraphBuffer first
int offset=0, clk=0, invert=0, maxErr=0;
sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
uint8_t BitStream[MAX_DEMOD_BUF_LEN];
size_t size = getFromGraphBuf(BitStream);
//invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer
int errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
if ( errCnt < 0 || errCnt > maxErr ) {
if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
return 0;
}
//attempt to Biphase decode BitStream
errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);
if (errCnt < 0){
if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
return 0;
}
if (errCnt > maxErr) {
if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt);
return 0;
}
//success set DemodBuffer and return
setDemodBuf(BitStream, size, 0);
if (g_debugMode || verbose){
PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
printDemodBuff();
}
return 1;
}
//by marshmellow - see ASKbiphaseDemod
int Cmdaskbiphdemod(const char *Cmd)
{
char cmdp = param_getchar(Cmd, 0);
if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: data rawdemod ab [offset] [clock] <invert> [maxError] [maxLen] <amplify>");
PrintAndLog(" [offset], offset to begin biphase, default=0");
PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
PrintAndLog(" <invert>, 1 to invert output");
PrintAndLog(" [set maximum allowed errors], default = 100");
PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
PrintAndLog(" NOTE: <invert> can be entered as second or third argument");
PrintAndLog(" NOTE: <amplify> can be entered as first, second or last argument");
PrintAndLog(" NOTE: any other arg must have previous args set to work");
PrintAndLog("");
PrintAndLog(" NOTE: --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
PrintAndLog("");
PrintAndLog(" sample: data rawdemod ab = demod an ask/biph tag from GraphBuffer");
PrintAndLog(" : data rawdemod ab 0 a = demod an ask/biph tag from GraphBuffer, amplified");
PrintAndLog(" : data rawdemod ab 1 32 = demod an ask/biph tag from GraphBuffer using an offset of 1 and a clock of RF/32");
PrintAndLog(" : data rawdemod ab 0 32 1 = demod an ask/biph tag from GraphBuffer using a clock of RF/32 and inverting data");
PrintAndLog(" : data rawdemod ab 0 1 = demod an ask/biph tag from GraphBuffer while inverting data");
PrintAndLog(" : data rawdemod ab 0 64 1 0 = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
PrintAndLog(" : data rawdemod ab 0 64 1 0 0 a = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp");
return 0;
}
return ASKbiphaseDemod(Cmd, true);
}
//by marshmellow - see ASKDemod
int Cmdaskrawdemod(const char *Cmd)
{
char cmdp = param_getchar(Cmd, 0);
if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
PrintAndLog(" <invert>, 1 to invert output");
PrintAndLog(" [set maximum allowed errors], default = 100");
PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
PrintAndLog("");
PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
PrintAndLog(" : data rawdemod ar 64 1 0 = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
PrintAndLog(" : data rawdemod ar 64 1 0 0 a = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp");
return 0;
}
return ASKDemod(Cmd, true, false, 0);
}
int AutoCorrelate(int window, bool SaveGrph, bool verbose)
{
static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
size_t Correlation = 0;
int maxSum = 0;
int lastMax = 0;
if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
for (int i = 0; i < GraphTraceLen - window; ++i) {
int sum = 0;
for (int j = 0; j < window; ++j) {
sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
}
CorrelBuffer[i] = sum;
if (sum >= maxSum-100 && sum <= maxSum+100){
//another max
Correlation = i-lastMax;
lastMax = i;
if (sum > maxSum) maxSum = sum;
} else if (sum > maxSum){
maxSum=sum;
lastMax = i;
}
}
if (Correlation==0){
//try again with wider margin
for (int i = 0; i < GraphTraceLen - window; i++){
if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){
//another max
Correlation = i-lastMax;
lastMax = i;
//if (CorrelBuffer[i] > maxSum) maxSum = sum;
}
}
}
if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
if (SaveGrph){
GraphTraceLen = GraphTraceLen - window;
memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
RepaintGraphWindow();
}
return Correlation;
}
int usage_data_autocorr(void)
{
//print help
PrintAndLog("Usage: data autocorr [window] [g]");
PrintAndLog("Options: ");
PrintAndLog(" h This help");
PrintAndLog(" [window] window length for correlation - default = 4000");
PrintAndLog(" g save back to GraphBuffer (overwrite)");
return 0;
}
int CmdAutoCorr(const char *Cmd)
{
char cmdp = param_getchar(Cmd, 0);
if (cmdp == 'h' || cmdp == 'H')
return usage_data_autocorr();
int window = 4000; //set default
char grph=0;
bool updateGrph = false;
sscanf(Cmd, "%i %c", &window, &grph);
if (window >= GraphTraceLen) {
PrintAndLog("window must be smaller than trace (%d samples)",
GraphTraceLen);
return 0;
}
if (grph == 'g') updateGrph=true;
return AutoCorrelate(window, updateGrph, true);
}
int CmdBitsamples(const char *Cmd)
{
int cnt = 0;
uint8_t got[12288];
GetFromBigBuf(got,sizeof(got),0);
WaitForResponse(CMD_ACK,NULL);
for (int j = 0; j < sizeof(got); j++) {
for (int k = 0; k < 8; k++) {
if(got[j] & (1 << (7 - k))) {
GraphBuffer[cnt++] = 1;
} else {
GraphBuffer[cnt++] = 0;
}
}
}
GraphTraceLen = cnt;
RepaintGraphWindow();
return 0;
}
int CmdBuffClear(const char *Cmd)
{
UsbCommand c = {CMD_BUFF_CLEAR};
SendCommand(&c);
ClearGraph(true);
return 0;
}
int CmdDec(const char *Cmd)
{
for (int i = 0; i < (GraphTraceLen / 2); ++i)
GraphBuffer[i] = GraphBuffer[i * 2];
GraphTraceLen /= 2;
PrintAndLog("decimated by 2");
RepaintGraphWindow();
return 0;
}
/**
* Undecimate - I'd call it 'interpolate', but we'll save that
* name until someone does an actual interpolation command, not just
* blindly repeating samples
* @param Cmd
* @return
*/
int CmdUndec(const char *Cmd)
{
if(param_getchar(Cmd, 0) == 'h')
{
PrintAndLog("Usage: data undec [factor]");
PrintAndLog("This function performs un-decimation, by repeating each sample N times");
PrintAndLog("Options: ");
PrintAndLog(" h This help");
PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
PrintAndLog("Example: 'data undec 3'");
return 0;
}
uint8_t factor = param_get8ex(Cmd, 0,2, 10);
//We have memory, don't we?
int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
uint32_t g_index = 0, s_index = 0;
while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
{
int count = 0;
for(count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
swap[s_index+count] = GraphBuffer[g_index];
s_index += count;
g_index++;
}
memcpy(GraphBuffer, swap, s_index * sizeof(int));
GraphTraceLen = s_index;
RepaintGraphWindow();
return 0;
}
//by marshmellow
//shift graph zero up or down based on input + or -
int CmdGraphShiftZero(const char *Cmd)
{
int shift=0;
//set options from parameters entered with the command
sscanf(Cmd, "%i", &shift);
int shiftedVal=0;
for(int i = 0; i<GraphTraceLen; i++){
shiftedVal=GraphBuffer[i]+shift;
if (shiftedVal>127)
shiftedVal=127;
else if (shiftedVal<-127)
shiftedVal=-127;
GraphBuffer[i]= shiftedVal;
}
CmdNorm("");
return 0;
}
//by marshmellow
//use large jumps in read samples to identify edges of waves and then amplify that wave to max
//similar to dirtheshold, threshold commands
//takes a threshold length which is the measured length between two samples then determines an edge
int CmdAskEdgeDetect(const char *Cmd)
{
int thresLen = 25;
int Last = 0;
sscanf(Cmd, "%i", &thresLen);
for(int i = 1; i<GraphTraceLen; i++){
if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
Last = 127;
else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
Last = -127;
GraphBuffer[i-1] = Last;
}
RepaintGraphWindow();
return 0;
}
/* Print our clock rate */
// uses data from graphbuffer
// adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
int CmdDetectClockRate(const char *Cmd)
{
char cmdp = param_getchar(Cmd, 0);
if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: data detectclock [modulation] <clock>");
PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
PrintAndLog("");
PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
}
int ans=0;
if (cmdp == 'a'){
ans = GetAskClock(Cmd+1, true, false);
} else if (cmdp == 'f'){
ans = GetFskClock("", true, false);
} else if (cmdp == 'n'){
ans = GetNrzClock("", true, false);
} else if (cmdp == 'p'){
ans = GetPskClock("", true, false);
} else {
PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
}
return ans;
}
char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
{
static char fType[8];
memset(fType, 0x00, 8);
char *fskType = fType;
if (fchigh==10 && fclow==8){
if (invert) //fsk2a
memcpy(fskType, "FSK2a", 5);
else //fsk2
memcpy(fskType, "FSK2", 4);
} else if (fchigh == 8 && fclow == 5) {
if (invert)
memcpy(fskType, "FSK1", 4);
else
memcpy(fskType, "FSK1a", 5);
} else {
memcpy(fskType, "FSK??", 5);
}
return fskType;
}
//by marshmellow
//fsk raw demod and print binary
//takes 4 arguments - Clock, invert, fchigh, fclow
//defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
int FSKrawDemod(const char *Cmd, bool verbose)
{
//raw fsk demod no manchester decoding no start bit finding just get binary from wave
uint8_t rfLen, invert, fchigh, fclow;
//set defaults
//set options from parameters entered with the command
rfLen = param_get8(Cmd, 0);
invert = param_get8(Cmd, 1);
fchigh = param_get8(Cmd, 2);
fclow = param_get8(Cmd, 3);
if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
if (rfLen==1) {
invert = 1; //if invert option only is used
rfLen = 0;
}
}
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
size_t BitLen = getFromGraphBuf(BitStream);
if (BitLen==0) return 0;
//get field clock lengths
uint16_t fcs=0;
if (!fchigh || !fclow) {
fcs = countFC(BitStream, BitLen, 1);
if (!fcs) {
fchigh = 10;
fclow = 8;
} else {
fchigh = (fcs >> 8) & 0x00FF;
fclow = fcs & 0x00FF;
}
}
//get bit clock length
if (!rfLen) {
rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
if (!rfLen) rfLen = 50;
}
int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);
if (size > 0) {
setDemodBuf(BitStream,size,0);
// Now output the bitstream to the scrollback by line of 16 bits
if (verbose || g_debugMode) {
PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert));
printDemodBuff();
}
return 1;
} else {
if (g_debugMode) PrintAndLog("no FSK data found");
}
return 0;
}
//by marshmellow
//fsk raw demod and print binary
//takes 4 arguments - Clock, invert, fchigh, fclow
//defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
int CmdFSKrawdemod(const char *Cmd)
{
char cmdp = param_getchar(Cmd, 0);
if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
PrintAndLog(" [fclow], small field clock length, omit for autodetect");
PrintAndLog("");
PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
return 0;
}
return FSKrawDemod(Cmd, true);
}
//by marshmellow
//attempt to psk1 demod graph buffer
int PSKDemod(const char *Cmd, bool verbose)
{
int invert=0;
int clk=0;
int maxErr=100;
sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
if (clk==1){
invert=1;
clk=0;
}
if (invert != 0 && invert != 1) {
if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
return 0;
}
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
size_t BitLen = getFromGraphBuf(BitStream);
if (BitLen==0) return 0;
uint8_t carrier=countFC(BitStream, BitLen, 0);
if (carrier!=2 && carrier!=4 && carrier!=8){
//invalid carrier
return 0;
}
if (g_debugMode){
PrintAndLog("Carrier: rf/%d",carrier);
}
int errCnt=0;
errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
if (errCnt > maxErr){
if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
return 0;
}
if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
return 0;
}
if (verbose || g_debugMode){
PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
if (errCnt>0){
PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
}
}
//prime demod buffer for output
setDemodBuf(BitStream,BitLen,0);
return 1;
}
// by marshmellow
// takes 3 arguments - clock, invert, maxErr as integers
// attempts to demodulate nrz only
// prints binary found and saves in demodbuffer for further commands
int NRZrawDemod(const char *Cmd, bool verbose)
{
int invert=0;
int clk=0;
int maxErr=100;
sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
if (clk==1){
invert=1;
clk=0;
}
if (invert != 0 && invert != 1) {
PrintAndLog("Invalid argument: %s", Cmd);
return 0;
}
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
size_t BitLen = getFromGraphBuf(BitStream);
if (BitLen==0) return 0;
int errCnt=0;
int clkStartIdx = 0;
errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert, &clkStartIdx);
if (errCnt > maxErr){
if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
return 0;
}
if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
return 0;
}
if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
//prime demod buffer for output
setDemodBuf(BitStream,BitLen,0);
if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
if (verbose || g_debugMode) {
PrintAndLog("NRZ demoded bitstream:");
// Now output the bitstream to the scrollback by line of 16 bits
printDemodBuff();
}
return 1;
}
int CmdNRZrawDemod(const char *Cmd)
{
char cmdp = param_getchar(Cmd, 0);
if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
PrintAndLog(" <invert>, 1 for invert output");
PrintAndLog(" [set maximum allowed errors], default = 100.");
PrintAndLog("");
PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
PrintAndLog(" : data rawdemod nr 64 1 0 = demod a nrz/direct tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
return 0;
}
return NRZrawDemod(Cmd, true);
}
// by marshmellow
// takes 3 arguments - clock, invert, maxErr as integers
// attempts to demodulate psk only
// prints binary found and saves in demodbuffer for further commands
int CmdPSK1rawDemod(const char *Cmd)
{
int ans;
char cmdp = param_getchar(Cmd, 0);
if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
PrintAndLog(" <invert>, 1 for invert output");
PrintAndLog(" [set maximum allowed errors], default = 100.");
PrintAndLog("");
PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
PrintAndLog(" : data rawdemod p1 64 1 0 = demod a psk1 tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
return 0;
}
ans = PSKDemod(Cmd, true);
//output
if (!ans){
if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
return 0;
}
PrintAndLog("PSK1 demoded bitstream:");
// Now output the bitstream to the scrollback by line of 16 bits
printDemodBuff();
return 1;
}
// by marshmellow
// takes same args as cmdpsk1rawdemod
int CmdPSK2rawDemod(const char *Cmd)
{
int ans=0;
char cmdp = param_getchar(Cmd, 0);
if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
PrintAndLog(" <invert>, 1 for invert output");
PrintAndLog(" [set maximum allowed errors], default = 100.");
PrintAndLog("");
PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
PrintAndLog(" : data rawdemod p2 64 1 0 = demod a psk2 tag from GraphBuffer using a clock of RF/64, inverting output and allowing 0 demod errors");
return 0;
}
ans=PSKDemod(Cmd, true);
if (!ans){
if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
return 0;
}
psk1TOpsk2(DemodBuffer, DemodBufferLen);
PrintAndLog("PSK2 demoded bitstream:");
// Now output the bitstream to the scrollback by line of 16 bits
printDemodBuff();
return 1;
}
// by marshmellow - combines all raw demod functions into one menu command
int CmdRawDemod(const char *Cmd)
{
char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
PrintAndLog(" <options> see specific modulation help for optional parameters");
PrintAndLog("");
PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
return 0;
}
char cmdp2 = Cmd[1];
int ans = 0;
if (cmdp == 'f' && cmdp2 == 's'){
ans = CmdFSKrawdemod(Cmd+2);
} else if(cmdp == 'a' && cmdp2 == 'b'){
ans = Cmdaskbiphdemod(Cmd+2);
} else if(cmdp == 'a' && cmdp2 == 'm'){
ans = Cmdaskmandemod(Cmd+2);
} else if(cmdp == 'a' && cmdp2 == 'r'){
ans = Cmdaskrawdemod(Cmd+2);
} else if(cmdp == 'n' && cmdp2 == 'r'){
ans = CmdNRZrawDemod(Cmd+2);
} else if(cmdp == 'p' && cmdp2 == '1'){
ans = CmdPSK1rawDemod(Cmd+2);
} else if(cmdp == 'p' && cmdp2 == '2'){
ans = CmdPSK2rawDemod(Cmd+2);
} else {
PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
}
return ans;
}
int CmdGrid(const char *Cmd)
{
sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
PlotGridXdefault= PlotGridX;
PlotGridYdefault= PlotGridY;
RepaintGraphWindow();
return 0;
}
int CmdSetGraphMarkers(const char *Cmd) {
sscanf(Cmd, "%i %i", &CursorCPos, &CursorDPos);
RepaintGraphWindow();
return 0;
}
int CmdHexsamples(const char *Cmd)
{
int i, j;
int requested = 0;
int offset = 0;
char string_buf[25];
char* string_ptr = string_buf;
uint8_t got[BIGBUF_SIZE];
sscanf(Cmd, "%i %i", &requested, &offset);
/* if no args send something */
if (requested == 0) {
requested = 8;
}
if (offset + requested > sizeof(got)) {
PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
return 0;
}
GetFromBigBuf(got,requested,offset);
WaitForResponse(CMD_ACK,NULL);
i = 0;
for (j = 0; j < requested; j++) {
i++;
string_ptr += sprintf(string_ptr, "%02x ", got[j]);
if (i == 8) {
*(string_ptr - 1) = '\0'; // remove the trailing space
PrintAndLog("%s", string_buf);
string_buf[0] = '\0';
string_ptr = string_buf;
i = 0;
}
if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
*(string_ptr - 1) = '\0';
PrintAndLog("%s", string_buf);
string_buf[0] = '\0';
}
}
return 0;
}
int CmdHide(const char *Cmd)
{
HideGraphWindow();
return 0;
}
//zero mean GraphBuffer
int CmdHpf(const char *Cmd)
{
int i;
int accum = 0;
for (i = 10; i < GraphTraceLen; ++i)
accum += GraphBuffer[i];
accum /= (GraphTraceLen - 10);
for (i = 0; i < GraphTraceLen; ++i)
GraphBuffer[i] -= accum;
RepaintGraphWindow();
return 0;
}
uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b)
{
int i;
uint8_t val = 0;
for(i =0 ; i < bits_per_sample; i++)
{
val |= (headBit(b) << (7-i));
}
return val;
}
int getSamples(const char *Cmd, bool silent)
{
//If we get all but the last byte in bigbuf,
// we don't have to worry about remaining trash
// in the last byte in case the bits-per-sample
// does not line up on byte boundaries
uint8_t got[BIGBUF_SIZE-1] = { 0 };
int n = strtol(Cmd, NULL, 0);
if (n == 0 || n > sizeof(got))
n = sizeof(got);
PrintAndLog("Reading %d bytes from device memory\n", n);
GetFromBigBuf(got,n,0);
PrintAndLog("Data fetched");
UsbCommand response;
WaitForResponse(CMD_ACK, &response);
uint8_t bits_per_sample = 8;
//Old devices without this feature would send 0 at arg[0]
if(response.arg[0] > 0)
{
sample_config *sc = (sample_config *) response.d.asBytes;
PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample
, sc->decimation);
bits_per_sample = sc->bits_per_sample;
}
if(bits_per_sample < 8)
{
PrintAndLog("Unpacking...");
BitstreamIn bout = { got, bits_per_sample * n, 0};
int j =0;
for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
uint8_t sample = getByte(bits_per_sample, &bout);
GraphBuffer[j] = ((int) sample )- 128;
}
GraphTraceLen = j;
PrintAndLog("Unpacked %d samples" , j );
}else
{
for (int j = 0; j < n; j++) {
GraphBuffer[j] = ((int)got[j]) - 128;
}
GraphTraceLen = n;
}
RepaintGraphWindow();
return 0;
}
int CmdSamples(const char *Cmd)
{
return getSamples(Cmd, false);
}
int CmdTuneSamples(const char *Cmd)
{
int timeout = 0, arg = FLAG_TUNE_ALL;
if(*Cmd == 'l') {
arg = FLAG_TUNE_LF;
} else if (*Cmd == 'h') {
arg = FLAG_TUNE_HF;
} else if (*Cmd != '\0') {
PrintAndLog("use 'tune' or 'tune l' or 'tune h'");
return 0;
}
printf("\nMeasuring antenna characteristics, please wait...");
UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {arg, 0, 0}};
SendCommand(&c);
UsbCommand resp;
while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {
timeout++;
printf(".");
if (timeout > 7) {
PrintAndLog("\nNo response from Proxmark. Aborting...");
return 1;
}
}
int peakv, peakf;
int vLf125, vLf134, vHf;
vLf125 = resp.arg[0] & 0xffff;
vLf134 = resp.arg[0] >> 16;
vHf = resp.arg[1] & 0xffff;;
peakf = resp.arg[2] & 0xffff;
peakv = resp.arg[2] >> 16;
PrintAndLog("");
PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
#define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
#define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
#define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
#define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
if (peakv < LF_UNUSABLE_V)
PrintAndLog("# Your LF antenna is unusable.");
else if (peakv < LF_MARGINAL_V)
PrintAndLog("# Your LF antenna is marginal.");
if (vHf < HF_UNUSABLE_V)
PrintAndLog("# Your HF antenna is unusable.");
else if (vHf < HF_MARGINAL_V)
PrintAndLog("# Your HF antenna is marginal.");
if (peakv >= LF_UNUSABLE_V) {
for (int i = 0; i < 256; i++) {
GraphBuffer[i] = resp.d.asBytes[i] - 128;
}
PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
PrintAndLog("\n");
GraphTraceLen = 256;
ShowGraphWindow();
RepaintGraphWindow();
}
return 0;
}
int CmdLoad(const char *Cmd)
{
char filename[FILE_PATH_SIZE] = {0x00};
int len = 0;
len = strlen(Cmd);
if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
memcpy(filename, Cmd, len);
FILE *f = fopen(filename, "r");
if (!f) {
PrintAndLog("couldn't open '%s'", filename);
return 0;
}
GraphTraceLen = 0;
char line[80];
while (fgets(line, sizeof (line), f)) {
GraphBuffer[GraphTraceLen] = atoi(line);
GraphTraceLen++;
}
fclose(f);
PrintAndLog("loaded %d samples", GraphTraceLen);
RepaintGraphWindow();
return 0;
}
int CmdLtrim(const char *Cmd)
{
int ds = atoi(Cmd);
if (GraphTraceLen<=0) return 0;
for (int i = ds; i < GraphTraceLen; ++i)
GraphBuffer[i-ds] = GraphBuffer[i];
GraphTraceLen -= ds;
RepaintGraphWindow();
return 0;
}
// trim graph to input argument length
int CmdRtrim(const char *Cmd)
{
int ds = atoi(Cmd);
GraphTraceLen = ds;
RepaintGraphWindow();
return 0;
}
// trim graph (middle) piece
int CmdMtrim(const char *Cmd) {
int start = 0, stop = 0;
sscanf(Cmd, "%i %i", &start, &stop);
if (start > GraphTraceLen || stop > GraphTraceLen || start > stop) return 0;
start++; //leave start position sample
GraphTraceLen -= stop - start;
for (int i = 0; i < GraphTraceLen; i++) {
GraphBuffer[start+i] = GraphBuffer[stop+i];
}
return 0;
}
int CmdNorm(const char *Cmd)
{
int i;
int max = INT_MIN, min = INT_MAX;
for (i = 10; i < GraphTraceLen; ++i) {
if (GraphBuffer[i] > max)
max = GraphBuffer[i];
if (GraphBuffer[i] < min)
min = GraphBuffer[i];
}
if (max != min) {
for (i = 0; i < GraphTraceLen; ++i) {
GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
(max - min);
//marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
}
}
RepaintGraphWindow();
return 0;
}
int CmdPlot(const char *Cmd)
{
ShowGraphWindow();
return 0;
}
int CmdSave(const char *Cmd)
{
char filename[FILE_PATH_SIZE] = {0x00};
int len = 0;
len = strlen(Cmd);
if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
memcpy(filename, Cmd, len);
FILE *f = fopen(filename, "w");
if(!f) {
PrintAndLog("couldn't open '%s'", filename);
return 0;
}
int i;
for (i = 0; i < GraphTraceLen; i++) {
fprintf(f, "%d\n", GraphBuffer[i]);
}
fclose(f);
PrintAndLog("saved to '%s'", Cmd);
return 0;
}
int CmdScale(const char *Cmd)
{
CursorScaleFactor = atoi(Cmd);
if (CursorScaleFactor == 0) {
PrintAndLog("bad, can't have zero scale");
CursorScaleFactor = 1;
}
RepaintGraphWindow();
return 0;
}
int CmdDirectionalThreshold(const char *Cmd)
{
int8_t upThres = param_get8(Cmd, 0);
int8_t downThres = param_get8(Cmd, 1);
printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
int lastValue = GraphBuffer[0];
GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
for (int i = 1; i < GraphTraceLen; ++i) {
// Apply first threshold to samples heading up
if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
{
lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
GraphBuffer[i] = 127;
}
// Apply second threshold to samples heading down
else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
{
lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
GraphBuffer[i] = -127;
}
else
{
lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
GraphBuffer[i] = GraphBuffer[i-1];
}
}
GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
RepaintGraphWindow();
return 0;
}
int CmdZerocrossings(const char *Cmd)
{
// Zero-crossings aren't meaningful unless the signal is zero-mean.
CmdHpf("");
int sign = 1;
int zc = 0;
int lastZc = 0;
for (int i = 0; i < GraphTraceLen; ++i) {
if (GraphBuffer[i] * sign >= 0) {
// No change in sign, reproduce the previous sample count.
zc++;
GraphBuffer[i] = lastZc;
} else {
// Change in sign, reset the sample count.
sign = -sign;
GraphBuffer[i] = lastZc;
if (sign > 0) {
lastZc = zc;
zc = 0;
}
}
}
RepaintGraphWindow();
return 0;
}
int usage_data_bin2hex(){
PrintAndLog("Usage: data bin2hex <binary_digits>");
PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
return 0;
}
/**
* @brief Utility for conversion via cmdline.
* @param Cmd
* @return
*/
int Cmdbin2hex(const char *Cmd)
{
int bg =0, en =0;
if(param_getptr(Cmd, &bg, &en, 0))
{
return usage_data_bin2hex();
}
//Number of digits supplied as argument
size_t length = en - bg +1;
size_t bytelen = (length+7) / 8;
uint8_t* arr = (uint8_t *) malloc(bytelen);
memset(arr, 0, bytelen);
BitstreamOut bout = { arr, 0, 0 };
for(; bg <= en ;bg++)
{
char c = Cmd[bg];
if( c == '1') pushBit(&bout, 1);
else if( c == '0') pushBit(&bout, 0);
else PrintAndLog("Ignoring '%c'", c);
}
if(bout.numbits % 8 != 0)
{
printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
}
//Uses printf instead of PrintAndLog since the latter
// adds linebreaks to each printout - this way was more convenient since we don't have to
// allocate a string and write to that first...
for(size_t x = 0; x < bytelen ; x++)
{
printf("%02X", arr[x]);
}
printf("\n");
free(arr);
return 0;
}
int usage_data_hex2bin() {
PrintAndLog("Usage: data hex2bin <hex_digits>");
PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
return 0;
}
int Cmdhex2bin(const char *Cmd)
{
int bg =0, en =0;
if(param_getptr(Cmd, &bg, &en, 0))
{
return usage_data_hex2bin();
}
while(bg <= en )
{
char x = Cmd[bg++];
// capitalize
if (x >= 'a' && x <= 'f')
x -= 32;
// convert to numeric value
if (x >= '0' && x <= '9')
x -= '0';
else if (x >= 'A' && x <= 'F')
x -= 'A' - 10;
else
continue;
//Uses printf instead of PrintAndLog since the latter
// adds linebreaks to each printout - this way was more convenient since we don't have to
// allocate a string and write to that first...
for(int i= 0 ; i < 4 ; ++i)
printf("%d",(x >> (3 - i)) & 1);
}
printf("\n");
return 0;
}
static command_t CommandTable[] =
{
{"help", CmdHelp, 1, "This help"},
{"askedgedetect", CmdAskEdgeDetect, 1, "[threshold] Adjust Graph for manual ask demod using the length of sample differences to detect the edge of a wave (use 20-45, def:25)"},
{"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
{"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
{"bin2hex", Cmdbin2hex, 1, "bin2hex <digits> -- Converts binary to hexadecimal"},
{"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
{"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
{"dec", CmdDec, 1, "Decimate samples"},
{"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
//{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},
{"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
{"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
{"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
{"hex2bin", Cmdhex2bin, 1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
{"hide", CmdHide, 1, "Hide graph window"},
{"hpf", CmdHpf, 1, "Remove DC offset from trace"},
{"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
{"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
{"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
{"mtrim", CmdMtrim, 1, "<start> <stop> -- Trim out samples from the specified start to the specified stop"},
{"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
{"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
{"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
{"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
{"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
{"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
{"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
{"setgraphmarkers", CmdSetGraphMarkers, 1, "[orange_marker] [blue_marker] (in graph window)"},
{"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
{"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
{"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
{"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
{"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
{"undec", CmdUndec, 1, "Un-decimate samples by 2"},
{"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
{NULL, NULL, 0, NULL}
};
int CmdData(const char *Cmd)
{
CmdsParse(CommandTable, Cmd);
return 0;
}
int CmdHelp(const char *Cmd)
{
CmdsHelp(CommandTable);
return 0;
}
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