#include "lfdemod.h"
#include "usb_cmd.h"
#include "crc.h"
+#include "crc16.h"
uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
uint8_t g_debugMode;
-int DemodBufferLen;
+size_t DemodBufferLen;
static int CmdHelp(const char *Cmd);
//set the demod buffer with given array of binary (one bit per byte)
return 1;
}
+int usage_data_printdemodbuf(){
+ PrintAndLog("Usage: data printdemodbuffer x o <offset>");
+ PrintAndLog("Options: ");
+ PrintAndLog(" h This help");
+ PrintAndLog(" x output in hex (omit for binary output)");
+ PrintAndLog(" o <offset> enter offset in # of bits");
+ return 0;
+}
+
//by marshmellow
void printDemodBuff(void)
{
- uint32_t i = 0;
int bitLen = DemodBufferLen;
- if (bitLen<16) {
+ 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
- // ensure equally divided by 16
- bitLen &= 0xfff0;
-
- for (i = 0; i <= (bitLen-16); i+=16) {
- PrintAndLog("%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i",
- DemodBuffer[i],
- DemodBuffer[i+1],
- DemodBuffer[i+2],
- DemodBuffer[i+3],
- DemodBuffer[i+4],
- DemodBuffer[i+5],
- DemodBuffer[i+6],
- DemodBuffer[i+7],
- DemodBuffer[i+8],
- DemodBuffer[i+9],
- DemodBuffer[i+10],
- DemodBuffer[i+11],
- DemodBuffer[i+12],
- DemodBuffer[i+13],
- DemodBuffer[i+14],
- DemodBuffer[i+15]
- );
- }
+ char *bin = sprint_bin_break(DemodBuffer,bitLen,16);
+ PrintAndLog("%s",bin);
+
return;
}
int CmdPrintDemodBuff(const char *Cmd)
{
- char hex;
- char printBuff[512]={0x00};
- uint8_t numBits = DemodBufferLen & 0xFFF0;
- sscanf(Cmd, "%c", &hex);
- if (hex == 'h'){
- PrintAndLog("Usage: data printdemodbuffer [x]");
- PrintAndLog("Options: ");
- PrintAndLog(" h This help");
- PrintAndLog(" x output in hex (omit for binary output)");
- return 0;
- }
- if (hex == 'x'){
- numBits = binarraytohex(printBuff, (char *)DemodBuffer, numBits);
- if (numBits==0) return 0;
- PrintAndLog("DemodBuffer: %s",printBuff);
- } else {
- printDemodBuff();
- }
- return 1;
-}
-int CmdAmp(const char *Cmd)
-{
- int i, rising, falling;
- 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) {
- rising = falling= 0;
- for (i = 0; i < GraphTraceLen; ++i) {
- if (GraphBuffer[i + 1] < GraphBuffer[i]) {
- if (rising) {
- GraphBuffer[i] = max;
- rising = 0;
- }
- falling = 1;
- }
- if (GraphBuffer[i + 1] > GraphBuffer[i]) {
- if (falling) {
- GraphBuffer[i] = min;
- falling = 0;
- }
- rising= 1;
- }
+ char hex[512]={0x00};
+ bool hexMode = false;
+ bool errors = false;
+ uint8_t offset = 0;
+ 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_get8(Cmd, cmdp+1);
+ if (!offset) errors = true;
+ cmdp += 2;
+ break;
+ default:
+ PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
+ errors = true;
+ break;
}
+ if(errors) break;
}
- RepaintGraphWindow();
- return 0;
-}
-
-/*
- * Generic command to demodulate ASK.
- *
- * Argument is convention: positive or negative (High mod means zero
- * or high mod means one)
- *
- * Updates the Graph trace with 0/1 values
- *
- * Arguments:
- * c : 0 or 1 (or invert)
- */
- //this method ignores the clock
+ //Validations
+ if(errors) return usage_data_printdemodbuf();
- //this function strictly converts highs and lows to 1s and 0s for each sample in the graphbuffer
-int Cmdaskdemod(const char *Cmd)
-{
- int i;
- int c, high = 0, low = 0;
-
- sscanf(Cmd, "%i", &c);
+ int numBits = (DemodBufferLen-offset) & 0x7FC; //make sure we don't exceed our string
- /* Detect high and lows */
- for (i = 0; i < GraphTraceLen; ++i)
- {
- if (GraphBuffer[i] > high)
- high = GraphBuffer[i];
- else if (GraphBuffer[i] < low)
- low = GraphBuffer[i];
- }
- high=abs(high*.75);
- low=abs(low*.75);
- if (c != 0 && c != 1) {
- PrintAndLog("Invalid argument: %s", Cmd);
- return 0;
- }
- //prime loop
- if (GraphBuffer[0] > 0) {
- GraphBuffer[0] = 1-c;
+ if (hexMode){
+ char *buf = (char *) (DemodBuffer + offset);
+ numBits = binarraytohex(hex, buf, numBits);
+ if (numBits==0) return 0;
+ PrintAndLog("DemodBuffer: %s",hex);
} else {
- GraphBuffer[0] = c;
- }
- for (i = 1; i < GraphTraceLen; ++i) {
- /* Transitions are detected at each peak
- * Transitions are either:
- * - we're low: transition if we hit a high
- * - we're high: transition if we hit a low
- * (we need to do it this way because some tags keep high or
- * low for long periods, others just reach the peak and go
- * down)
- */
- //[marhsmellow] change == to >= for high and <= for low for fuzz
- if ((GraphBuffer[i] >= high) && (GraphBuffer[i - 1] == c)) {
- GraphBuffer[i] = 1 - c;
- } else if ((GraphBuffer[i] <= low) && (GraphBuffer[i - 1] == (1 - c))){
- GraphBuffer[i] = c;
- } else {
- /* No transition */
- GraphBuffer[i] = GraphBuffer[i - 1];
- }
+ //setDemodBuf(DemodBuffer, DemodBufferLen-offset, offset);
+ char *bin = sprint_bin_break(DemodBuffer+offset,numBits,16);
+ PrintAndLog("DemodBuffer:\n%s",bin);
}
- RepaintGraphWindow();
- return 0;
+ 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)
{
return 0;
}
-
-//by marshmellow
-void printBitStream(uint8_t BitStream[], uint32_t bitLen)
-{
- uint32_t i = 0;
- if (bitLen<16) {
- PrintAndLog("Too few bits found: %d",bitLen);
- return;
- }
- if (bitLen>512) bitLen=512;
-
- // ensure equally divided by 16
- bitLen &= 0xfff0;
-
-
- for (i = 0; i <= (bitLen-16); i+=16) {
- PrintAndLog("%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i",
- BitStream[i],
- BitStream[i+1],
- BitStream[i+2],
- BitStream[i+3],
- BitStream[i+4],
- BitStream[i+5],
- BitStream[i+6],
- BitStream[i+7],
- BitStream[i+8],
- BitStream[i+9],
- BitStream[i+10],
- BitStream[i+11],
- BitStream[i+12],
- BitStream[i+13],
- BitStream[i+14],
- BitStream[i+15]
- );
- }
- return;
-}
//by marshmellow
//print 64 bit EM410x ID in multiple formats
void printEM410x(uint32_t hi, uint64_t id)
}
if (hi){
//output 88 bit em id
- PrintAndLog("\nEM TAG ID : %06x%016llx", hi, id);
+ PrintAndLog("\nEM TAG ID : %06X%016llX", hi, id);
} else{
//output 40 bit em id
- PrintAndLog("\nEM TAG ID : %010llx", id);
- PrintAndLog("Unique TAG ID : %010llx", id2lo);
+ PrintAndLog("\nEM TAG ID : %010llX", id);
+ PrintAndLog("Unique TAG ID : %010llX", id2lo);
PrintAndLog("\nPossible de-scramble patterns");
PrintAndLog("HoneyWell IdentKey {");
PrintAndLog("DEZ 8 : %08lld",id & 0xFFFFFF);
);
uint64_t paxton = (((id>>32) << 24) | (id & 0xffffff)) + 0x143e00;
PrintAndLog("}\nOther : %05lld_%03lld_%08lld",(id&0xFFFF),((id>>16LL) & 0xFF),(id & 0xFFFFFF));
- PrintAndLog("Pattern Paxton : %0d", paxton);
+ PrintAndLog("Pattern Paxton : %lld [0x%llX]", paxton, paxton);
uint32_t p1id = (id & 0xFFFFFF);
uint8_t arr[32] = {0x00};
p1 |= arr[2] << 4;
p1 |= arr[1] << 5;
p1 |= arr[0] << 9;
- PrintAndLog("Pattern 1 : 0x%X - %d", p1, p1);
+ PrintAndLog("Pattern 1 : %d [0x%X]", p1, p1);
uint16_t sebury1 = id & 0xFFFF;
uint8_t sebury2 = (id >> 16) & 0x7F;
uint32_t sebury3 = id & 0x7FFFFF;
- PrintAndLog("Pattern Sebury : %d %d %d (hex: %X %X %X)", sebury1, sebury2, sebury3, sebury1, sebury2, sebury3);
+ PrintAndLog("Pattern Sebury : %d %d %d [0x%X 0x%X 0x%X]", sebury1, sebury2, sebury3, sebury1, sebury2, sebury3);
}
}
return;
}
-
-int AskEm410xDemod(const char *Cmd, uint32_t *hi, uint64_t *lo)
+int AskEm410xDecode(bool verbose, uint32_t *hi, uint64_t *lo )
{
- int ans = ASKmanDemod(Cmd, FALSE, FALSE);
- if (!ans) return 0;
-
- size_t idx=0;
- if (Em410xDecode(DemodBuffer,(size_t *) &DemodBufferLen, &idx, hi, lo)){
+ size_t idx = 0;
+ size_t BitLen = DemodBufferLen;
+ uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+ memcpy(BitStream, DemodBuffer, BitLen);
+ if (Em410xDecode(BitStream, &BitLen, &idx, hi, lo)){
+ //set GraphBuffer for clone or sim command
+ setDemodBuf(BitStream, BitLen, idx);
if (g_debugMode){
- PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, DemodBufferLen);
+ PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
printDemodBuff();
}
+ if (verbose){
+ PrintAndLog("EM410x pattern found: ");
+ printEM410x(*hi, *lo);
+ }
return 1;
}
return 0;
}
+
+int AskEm410xDemod(const char *Cmd, uint32_t *hi, uint64_t *lo, bool verbose)
+{
+ if (!ASKDemod(Cmd, FALSE, FALSE, 1)) return 0;
+ return AskEm410xDecode(verbose, hi, lo);
+}
+
//by marshmellow
//takes 3 arguments - clock, invert and maxErr as integers
//attempts to demodulate ask while decoding manchester
PrintAndLog(" : data askem410xdemod 64 1 0 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/64 and inverting data and allowing 0 demod errors");
return 0;
}
- uint32_t hi = 0;
uint64_t lo = 0;
- if (AskEm410xDemod(Cmd, &hi, &lo)) {
- PrintAndLog("EM410x pattern found: ");
- printEM410x(hi, lo);
- return 1;
- }
- return 0;
+ uint32_t hi = 0;
+ return AskEm410xDemod(Cmd, &hi, &lo, true);
}
-int ASKmanDemod(const char *Cmd, bool verbose, bool emSearch)
+//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(const char *Cmd, bool verbose, bool emSearch, uint8_t askType)
{
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", &clk, &invert, &maxErr);
+ sscanf(Cmd, "%i %i %i %i %c", &clk, &invert, &maxErr, &maxLen, &);
+ if (!maxLen) maxLen = 512*64;
if (invert != 0 && invert != 1) {
PrintAndLog("Invalid argument: %s", Cmd);
return 0;
invert=1;
clk=0;
}
+ if (amp == 'a' || amp == 'A') askAmp=1;
size_t BitLen = getFromGraphBuf(BitStream);
- if (g_debugMode==1) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
- if (BitLen==0) return 0;
- int errCnt=0;
- errCnt = askmandemod(BitStream, &BitLen, &clk, &invert, maxErr);
- if (errCnt<0||BitLen<16){ //if fatal error (or -1)
- if (g_debugMode==1) PrintAndLog("no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
+ if (g_debugMode) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
+ if (BitLen<255) return 0;
+ if (maxLen<BitLen && maxLen != 0) BitLen = maxLen;
+
+ 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 (verbose || g_debugMode) PrintAndLog("\nUsing Clock: %d - Invert: %d - Bits Found: %d",clk,invert,BitLen);
+ 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
- if (errCnt>0){
- if (verbose || g_debugMode) PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
- }
- if (verbose || g_debugMode) PrintAndLog("ASK/Manchester decoded bitstream:");
- // Now output the bitstream to the scrollback by line of 16 bits
setDemodBuf(BitStream,BitLen,0);
- if (verbose || g_debugMode) printDemodBuff();
- uint64_t lo =0;
- uint32_t hi =0;
- size_t idx=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){
- if (Em410xDecode(BitStream, &BitLen, &idx, &hi, &lo)){
- //set GraphBuffer for clone or sim command
- setDemodBuf(BitStream, BitLen, idx);
- if (g_debugMode){
- PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
- printDemodBuff();
- }
- if (verbose) PrintAndLog("EM410x pattern found: ");
- if (verbose) printEM410x(hi, lo);
- return 1;
- }
+ AskEm410xDecode(true, &hi, &lo);
}
return 1;
}
//by marshmellow
-//takes 3 arguments - clock, invert, maxErr as integers
+//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) > 10 || cmdp == 'h' || cmdp == 'H') {
- PrintAndLog("Usage: data rawdemod am [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.");
+ if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
+ PrintAndLog("Usage: data rawdemod am [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 (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 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;
}
- return ASKmanDemod(Cmd, TRUE, TRUE);
+ return ASKDemod(Cmd, TRUE, TRUE, 1);
}
//by marshmellow
int i =0;
int errCnt=0;
size_t size=0;
- size_t maxErr = 20;
+ int invert=0;
+ int maxErr = 20;
char cmdp = param_getchar(Cmd, 0);
- if (strlen(Cmd) > 1 || cmdp == 'h' || cmdp == 'H') {
- PrintAndLog("Usage: data manrawdecode");
+ 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;
else if(DemodBuffer[i]<low) low=DemodBuffer[i];
BitStream[i]=DemodBuffer[i];
}
- if (high>1 || low <0 ){
- PrintAndLog("Error: please raw demod the wave first then mancheseter raw decode");
+ 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;
- errCnt=manrawdecode(BitStream, &size);
+ errCnt=manrawdecode(BitStream, &size, invert);
if (errCnt>=maxErr){
PrintAndLog("Too many errors: %d",errCnt);
return 0;
}
PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
- printBitStream(BitStream, size);
+ PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
if (errCnt==0){
uint64_t id = 0;
uint32_t hi = 0;
//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
-// since it is not like manchester and doesn't have an incorrect bit pattern we
-// cannot determine if our decode is correct or if it should be shifted by one bit
-// the argument offset allows us to manually shift if the output is incorrect
-// (better would be to demod and decode at the same time so we can distinguish large
-// width waves vs small width waves to help the decode positioning) or askbiphdemod
+// 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;
}
if (errCnt>0){
- PrintAndLog("# Errors found during Demod (shown as 77 in bit stream): %d",errCnt);
+ PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);
}
PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);
- printBitStream(BitStream, size);
+ PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset); //remove first bit from raw demod
return 1;
}
-// set demod buffer back to raw after biphase demod
-void setBiphasetoRawDemodBuf(uint8_t *BitStream, size_t size)
-{
- uint8_t rawStream[512]={0x00};
- size_t i=0;
- uint8_t curPhase=0;
- if (size > 256) {
- PrintAndLog("ERROR - Biphase Demod Buffer overrun");
- return;
- }
- for (size_t idx=0; idx<size; idx++){
- if(!BitStream[idx]){
- rawStream[i++] = curPhase;
- rawStream[i++] = curPhase;
- curPhase ^= 1;
- } else {
- rawStream[i++] = curPhase;
- rawStream[i++] = curPhase ^ 1;
- }
- }
- setDemodBuf(rawStream,i,0);
- return;
-}
-
-//by marshmellow
-//takes 4 arguments - clock, invert, maxErr as integers and amplify as char
-//attempts to demodulate ask only
-//prints binary found and saves in graphbuffer for further commands
-int ASKrawDemod(const char *Cmd, bool verbose)
-{
- int invert=0;
- int clk=0;
- int maxErr=100;
- uint8_t askAmp = 0;
- char amp = param_getchar(Cmd, 0);
- uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
- sscanf(Cmd, "%i %i %i %c", &clk, &invert, &maxErr, &);
- if (invert != 0 && invert != 1) {
- if (verbose || g_debugMode) PrintAndLog("Invalid argument: %s", Cmd);
- return 0;
- }
- if (clk==1){
- invert=1;
- clk=0;
- }
- if (amp == 'a' || amp == 'A') askAmp=1;
- size_t BitLen = getFromGraphBuf(BitStream);
- if (BitLen==0) return 0;
- int errCnt=0;
- errCnt = askrawdemod(BitStream, &BitLen, &clk, &invert, maxErr, askAmp);
- if (errCnt==-1||BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
- if (verbose || g_debugMode) PrintAndLog("no data found");
- if (g_debugMode) PrintAndLog("errCnt: %d, BitLen: %d, clk: %d, invert: %d", errCnt, BitLen, clk, invert);
- return 0;
- }
- if (verbose || g_debugMode) PrintAndLog("Using Clock: %d - invert: %d - Bits Found: %d", clk, invert, BitLen);
-
- //move BitStream back to DemodBuffer
- setDemodBuf(BitStream,BitLen,0);
-
- //output
- if (errCnt>0 && (verbose || g_debugMode)){
- PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d", errCnt);
- }
- if (verbose || g_debugMode){
- PrintAndLog("ASK demoded bitstream:");
- // Now output the bitstream to the scrollback by line of 16 bits
- printBitStream(BitStream,BitLen);
- }
- 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, ans=0;
- ans = sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
- if (ans>0)
- ans = ASKrawDemod(Cmd+2, FALSE);
- else
- ans = ASKrawDemod(Cmd, FALSE);
- if (!ans) {
- if (g_debugMode || verbose) PrintAndLog("Error AskrawDemod: %d", ans);
- return 0;
- }
-
- //attempt to Biphase decode DemodBuffer
- size_t size = DemodBufferLen;
- uint8_t BitStream[MAX_DEMOD_BUF_LEN];
- memcpy(BitStream, DemodBuffer, DemodBufferLen);
+ 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;
+ }
- int errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);
+ //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;
//success set DemodBuffer and return
setDemodBuf(BitStream, size, 0);
if (g_debugMode || verbose){
- PrintAndLog("Biphase Decoded using offset: %d - # errors:%d - data:",offset,errCnt);
+ PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
printDemodBuff();
}
return 1;
int Cmdaskbiphdemod(const char *Cmd)
{
char cmdp = param_getchar(Cmd, 0);
- if (strlen(Cmd) > 12 || cmdp == 'h' || cmdp == 'H') {
- PrintAndLog("Usage: data rawdemod ab [offset] [clock] <invert> [maxError] <amplify>");
+ 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("");
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 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 a = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp");
+ 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);
return 1;
}
-//by marshmellow - see ASKrawDemod
+//by marshmellow - see ASKDemod
int Cmdaskrawdemod(const char *Cmd)
{
char cmdp = param_getchar(Cmd, 0);
- if (strlen(Cmd) > 12 || cmdp == 'h' || cmdp == 'H') {
- PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [amplify]");
+ if (strlen(Cmd) > 25 || 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 a = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp");
+ 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 ASKrawDemod(Cmd, TRUE);
+ return ASKDemod(Cmd, TRUE, FALSE, 0);
}
int AutoCorrelate(int window, bool SaveGrph, bool verbose)
return 0;
}
-/*
- * Convert to a bitstream
- */
-int CmdBitstream(const char *Cmd)
-{
- int i, j;
- int bit;
- int gtl;
- int clock;
- int low = 0;
- int high = 0;
- int hithigh, hitlow, first;
-
- /* Detect high and lows and clock */
- for (i = 0; i < GraphTraceLen; ++i)
- {
- if (GraphBuffer[i] > high)
- high = GraphBuffer[i];
- else if (GraphBuffer[i] < low)
- low = GraphBuffer[i];
- }
-
- /* Get our clock */
- clock = GetAskClock(Cmd, high, 1);
- gtl = ClearGraph(0);
-
- bit = 0;
- for (i = 0; i < (int)(gtl / clock); ++i)
- {
- hithigh = 0;
- hitlow = 0;
- first = 1;
- /* Find out if we hit both high and low peaks */
- for (j = 0; j < clock; ++j)
- {
- if (GraphBuffer[(i * clock) + j] == high)
- hithigh = 1;
- else if (GraphBuffer[(i * clock) + j] == low)
- hitlow = 1;
- /* it doesn't count if it's the first part of our read
- because it's really just trailing from the last sequence */
- if (first && (hithigh || hitlow))
- hithigh = hitlow = 0;
- else
- first = 0;
-
- if (hithigh && hitlow)
- break;
- }
-
- /* If we didn't hit both high and low peaks, we had a bit transition */
- if (!hithigh || !hitlow)
- bit ^= 1;
-
- AppendGraph(0, clock, bit);
- }
-
- RepaintGraphWindow();
- return 0;
-}
-
int CmdBuffClear(const char *Cmd)
{
UsbCommand c = {CMD_BUFF_CLEAR};
//by marshmellow
//use large jumps in read samples to identify edges of waves and then amplify that wave to max
-//similar to dirtheshold, threshold, and askdemod commands
+//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;
sscanf(Cmd, "%i", &thresLen);
- int shift = 127;
- int shiftedVal=0;
+
for(int i = 1; i<GraphTraceLen; i++){
if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
- shift=127;
+ GraphBuffer[i-1] = 127;
else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
- shift=-127;
-
- shiftedVal=GraphBuffer[i]+shift;
-
- if (shiftedVal>127)
- shiftedVal=127;
- else if (shiftedVal<-127)
- shiftedVal=-127;
- GraphBuffer[i-1] = shiftedVal;
+ GraphBuffer[i-1] = -127;
}
RepaintGraphWindow();
- //CmdNorm("");
return 0;
}
int CmdDetectClockRate(const char *Cmd)
{
char cmdp = param_getchar(Cmd, 0);
- if (strlen(Cmd) > 3 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
- PrintAndLog("Usage: data detectclock [modulation]");
+ 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");
}
int ans=0;
if (cmdp == 'a'){
- ans = GetAskClock("", true, false);
+ ans = GetAskClock(Cmd+1, true, false);
} else if (cmdp == 'f'){
ans = GetFskClock("", true, false);
} else if (cmdp == 'n'){
return ans;
}
+char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
+{
+ char *fskType;
+ if (fchigh==10 && fclow==8){
+ if (invert) //fsk2a
+ fskType = "FSK2a";
+ else //fsk2
+ fskType = "FSK2";
+ } else if (fchigh == 8 && fclow == 5) {
+ if (invert)
+ fskType = "FSK1";
+ else
+ fskType = "FSK1a";
+ } else {
+ fskType = "FSK??";
+ }
+ return fskType;
+}
+
//by marshmellow
//fsk raw demod and print binary
//takes 4 arguments - Clock, invert, fchigh, fclow
rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
if (rfLen == 0) rfLen = 50;
}
- if (verbose) PrintAndLog("Args invert: %d - Clock:%d - fchigh:%d - fclow: %d",invert,rfLen,fchigh, fclow);
int size = fskdemod(BitStream,BitLen,(uint8_t)rfLen,(uint8_t)invert,(uint8_t)fchigh,(uint8_t)fclow);
if (size>0){
setDemodBuf(BitStream,size,0);
// Now output the bitstream to the scrollback by line of 16 bits
- if(size > (8*32)+2) size = (8*32)+2; //only output a max of 8 blocks of 32 bits most tags will have full bit stream inside that sample size
- if (verbose) {
- PrintAndLog("FSK decoded bitstream:");
- printBitStream(BitStream,size);
+ if (verbose || g_debugMode) {
+ PrintAndLog("\nUsing Clock:%d, invert:%d, fchigh:%d, fclow:%d", rfLen, invert, fchigh, fclow);
+ PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert));
+ printDemodBuff();
}
return 1;
} else{
- if (verbose) PrintAndLog("no FSK data found");
+ if (g_debugMode) PrintAndLog("no FSK data found");
}
return 0;
}
return 0;
}
if (idx==0){
- if (g_debugMode==1){
+ if (g_debugMode){
PrintAndLog("DEBUG: IO Prox Data not found - FSK Bits: %d",BitLen);
- if (BitLen > 92) printBitStream(BitStream,92);
+ if (BitLen > 92) PrintAndLog("%s", sprint_bin_break(BitStream,92,16));
}
return 0;
}
//XSF(version)facility:codeone+codetwo (raw)
//Handle the data
if (idx+64>BitLen) {
- if (g_debugMode==1) PrintAndLog("not enough bits found - bitlen: %d",BitLen);
+ if (g_debugMode) PrintAndLog("not enough bits found - bitlen: %d",BitLen);
return 0;
}
PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx], BitStream[idx+1], BitStream[idx+2], BitStream[idx+3], BitStream[idx+4], BitStream[idx+5], BitStream[idx+6], BitStream[idx+7], BitStream[idx+8]);
for (uint8_t i=1; i<6; ++i){
calccrc += bytebits_to_byte(BitStream+idx+9*i,8);
- //PrintAndLog("%d", calccrc);
}
calccrc &= 0xff;
calccrc = 0xff - calccrc;
return 1;
}
-int CmdFSKdemod(const char *Cmd) //old CmdFSKdemod needs updating
-{
- static const int LowTone[] = {
- 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
- };
- static const int HighTone[] = {
- 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,
- };
-
- int lowLen = sizeof (LowTone) / sizeof (int);
- int highLen = sizeof (HighTone) / sizeof (int);
- int convLen = (highLen > lowLen) ? highLen : lowLen;
- uint32_t hi = 0, lo = 0;
-
- int i, j;
- int minMark = 0, maxMark = 0;
-
- for (i = 0; i < GraphTraceLen - convLen; ++i) {
- int lowSum = 0, highSum = 0;
-
- for (j = 0; j < lowLen; ++j) {
- lowSum += LowTone[j]*GraphBuffer[i+j];
- }
- for (j = 0; j < highLen; ++j) {
- highSum += HighTone[j] * GraphBuffer[i + j];
- }
- lowSum = abs(100 * lowSum / lowLen);
- highSum = abs(100 * highSum / highLen);
- GraphBuffer[i] = (highSum << 16) | lowSum;
- }
-
- for(i = 0; i < GraphTraceLen - convLen - 16; ++i) {
- int lowTot = 0, highTot = 0;
- // 10 and 8 are f_s divided by f_l and f_h, rounded
- for (j = 0; j < 10; ++j) {
- lowTot += (GraphBuffer[i+j] & 0xffff);
- }
- for (j = 0; j < 8; j++) {
- highTot += (GraphBuffer[i + j] >> 16);
- }
- GraphBuffer[i] = lowTot - highTot;
- if (GraphBuffer[i] > maxMark) maxMark = GraphBuffer[i];
- if (GraphBuffer[i] < minMark) minMark = GraphBuffer[i];
+// FDX-B ISO11784/85 demod (aka animal tag) BIPHASE, inverted, rf/32, with preamble of 00000000001 (128bits)
+// 8 databits + 1 parity (1)
+// CIITT 16 chksum
+// NATIONAL CODE, ICAR database
+// COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
+// FLAG (animal/non-animal)
+int CmdFDXBdemodBI(const char *Cmd){
+
+ int invert = 1;
+ int clk = 32;
+ int errCnt = 0;
+ int maxErr = 0;
+ uint8_t BitStream[MAX_DEMOD_BUF_LEN];
+ size_t size = getFromGraphBuf(BitStream);
+
+ 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;
}
- GraphTraceLen -= (convLen + 16);
- RepaintGraphWindow();
+ errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1);
+ if (errCnt < 0 || errCnt > maxErr ) {
+ if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
+ return 0;
+ }
- // Find bit-sync (3 lo followed by 3 high) (HID ONLY)
- int max = 0, maxPos = 0;
- for (i = 0; i < 6000; ++i) {
- int dec = 0;
- for (j = 0; j < 3 * lowLen; ++j) {
- dec -= GraphBuffer[i + j];
- }
- for (; j < 3 * (lowLen + highLen ); ++j) {
- dec += GraphBuffer[i + j];
- }
- if (dec > max) {
- max = dec;
- maxPos = i;
- }
+ int preambleIndex = FDXBdemodBI(BitStream, &size);
+ if (preambleIndex < 0){
+ if (g_debugMode) PrintAndLog("Error FDXBDemod , no startmarker found :: %d",preambleIndex);
+ return 0;
}
- // place start of bit sync marker in graph
- GraphBuffer[maxPos] = maxMark;
- GraphBuffer[maxPos + 1] = minMark;
-
- maxPos += j;
-
- // place end of bit sync marker in graph
- GraphBuffer[maxPos] = maxMark;
- GraphBuffer[maxPos+1] = minMark;
-
- PrintAndLog("actual data bits start at sample %d", maxPos);
- PrintAndLog("length %d/%d", highLen, lowLen);
+ setDemodBuf(BitStream, 128, preambleIndex);
- uint8_t bits[46] = {0x00};
-
- // find bit pairs and manchester decode them
- for (i = 0; i < arraylen(bits) - 1; ++i) {
- int dec = 0;
- for (j = 0; j < lowLen; ++j) {
- dec -= GraphBuffer[maxPos + j];
- }
- for (; j < lowLen + highLen; ++j) {
- dec += GraphBuffer[maxPos + j];
- }
- maxPos += j;
- // place inter bit marker in graph
- GraphBuffer[maxPos] = maxMark;
- GraphBuffer[maxPos + 1] = minMark;
-
- // hi and lo form a 64 bit pair
- hi = (hi << 1) | (lo >> 31);
- lo = (lo << 1);
- // store decoded bit as binary (in hi/lo) and text (in bits[])
- if(dec < 0) {
- bits[i] = '1';
- lo |= 1;
- } else {
- bits[i] = '0';
- }
+ // remove marker bits (1's every 9th digit after preamble) (pType = 2)
+ size = removeParity(BitStream, preambleIndex + 11, 9, 2, 117);
+ if ( size != 104 ) {
+ if (g_debugMode) PrintAndLog("Error removeParity:: %d", size);
+ return 0;
}
- PrintAndLog("bits: '%s'", bits);
- PrintAndLog("hex: %08x %08x", hi, lo);
- return 0;
+ if (g_debugMode) {
+ char *bin = sprint_bin_break(BitStream,size,16);
+ PrintAndLog("DEBUG BinStream:\n%s",bin);
+ }
+ PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
+ if (g_debugMode) PrintAndLog("Start marker %d; Size %d", preambleIndex, size);
+
+ //got a good demod
+ uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(BitStream+32,6)) << 32) | bytebits_to_byteLSBF(BitStream,32);
+ uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10);
+ uint8_t dataBlockBit = BitStream[48];
+ uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14);
+ uint8_t animalBit = BitStream[63];
+ uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);
+ uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);
+
+ uint64_t rawid = ((uint64_t)bytebits_to_byte(BitStream,32)<<32) | bytebits_to_byte(BitStream+32,32);
+ uint8_t raw[8];
+ num_to_bytes(rawid, 8, raw);
+
+ if (g_debugMode) PrintAndLog("Raw ID Hex: %s", sprint_hex(raw,8));
+
+ uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
+ PrintAndLog("Animal ID: %04u-%012llu", countryCode, NationalCode);
+ PrintAndLog("National Code: %012llu", NationalCode);
+ PrintAndLog("CountryCode: %04u", countryCode);
+ PrintAndLog("Extended Data: %s", dataBlockBit ? "True" : "False");
+ PrintAndLog("reserved Code: %u", reservedCode);
+ PrintAndLog("Animal Tag: %s", animalBit ? "True" : "False");
+ PrintAndLog("CRC: 0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");
+ PrintAndLog("Extended: 0x%X\n", extended);
+
+ return 1;
}
+
//by marshmellow
//attempt to psk1 demod graph buffer
int PSKDemod(const char *Cmd, bool verbose)
clk=0;
}
if (invert != 0 && invert != 1) {
- if (verbose) PrintAndLog("Invalid argument: %s", Cmd);
+ 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 -1;
+ if (BitLen==0) return 0;
uint8_t carrier=countFC(BitStream, BitLen, 0);
if (carrier!=2 && carrier!=4 && carrier!=8){
//invalid carrier
int errCnt=0;
errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
if (errCnt > maxErr){
- if (g_debugMode==1 && verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
+ 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==1 && verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
+ if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
return 0;
}
- if (verbose){
- PrintAndLog("Tried PSK Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
+ 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 77 in bit stream): %d",errCnt);
+ PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
}
}
//prime demod buffer for output
return 0;
}
uint8_t invert=0;
- ans = indala26decode(DemodBuffer,(size_t *) &DemodBufferLen, &invert);
+ ans = indala26decode(DemodBuffer, &DemodBufferLen, &invert);
if (ans < 1) {
if (g_debugMode==1)
PrintAndLog("Error2: %d",ans);
return 1;
}
+int CmdPSKNexWatch(const char *Cmd)
+{
+ if (!PSKDemod("", false)) return 0;
+ uint8_t preamble[28] = {0,0,0,0,0,1,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
+ size_t startIdx = 0, size = DemodBufferLen;
+ bool invert = false;
+ if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){
+ // if didn't find preamble try again inverting
+ if (!PSKDemod("1", false)) return 0;
+ size = DemodBufferLen;
+ if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)) return 0;
+ invert = true;
+ }
+ if (size != 128) return 0;
+ setDemodBuf(DemodBuffer, size, startIdx+4);
+ startIdx = 8+32; //4 = extra i added, 8 = preamble, 32 = reserved bits (always 0)
+ //get ID
+ uint32_t ID = 0;
+ for (uint8_t wordIdx=0; wordIdx<4; wordIdx++){
+ for (uint8_t idx=0; idx<8; idx++){
+ ID = (ID << 1) | DemodBuffer[startIdx+wordIdx+(idx*4)];
+ }
+ }
+ //parity check (TBD)
+
+ //checksum check (TBD)
+
+ //output
+ PrintAndLog("NexWatch ID: %d", ID);
+ if (invert){
+ PrintAndLog("Had to Invert - probably NexKey");
+ for (uint8_t idx=0; idx<size; idx++)
+ DemodBuffer[idx] ^= 1;
+ }
+
+ CmdPrintDemodBuff("x");
+ 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;
//prime demod buffer for output
setDemodBuf(BitStream,BitLen,0);
- if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
+ 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
return 0;
}
- PrintAndLog("PSK demoded bitstream:");
+ PrintAndLog("PSK1 demoded bitstream:");
// Now output the bitstream to the scrollback by line of 16 bits
printDemodBuff();
return 1;
{
char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
- if (strlen(Cmd) > 14 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
+ if (strlen(Cmd) > 20 || 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");
char cmdp2 = Cmd[1];
int ans = 0;
if (cmdp == 'f' && cmdp2 == 's'){
- ans = CmdFSKrawdemod(Cmd+3);
+ ans = CmdFSKrawdemod(Cmd+2);
} else if(cmdp == 'a' && cmdp2 == 'b'){
- ans = Cmdaskbiphdemod(Cmd+3);
+ ans = Cmdaskbiphdemod(Cmd+2);
} else if(cmdp == 'a' && cmdp2 == 'm'){
- ans = Cmdaskmandemod(Cmd+3);
+ ans = Cmdaskmandemod(Cmd+2);
} else if(cmdp == 'a' && cmdp2 == 'r'){
- ans = Cmdaskrawdemod(Cmd+3);
+ ans = Cmdaskrawdemod(Cmd+2);
} else if(cmdp == 'n' && cmdp2 == 'r'){
- ans = CmdNRZrawDemod(Cmd+3);
+ ans = CmdNRZrawDemod(Cmd+2);
} else if(cmdp == 'p' && cmdp2 == '1'){
- ans = CmdPSK1rawDemod(Cmd+3);
+ ans = CmdPSK1rawDemod(Cmd+2);
} else if(cmdp == 'p' && cmdp2 == '2'){
- ans = CmdPSK2rawDemod(Cmd+3);
+ ans = CmdPSK2rawDemod(Cmd+2);
} else {
PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
}
PrintAndLog("Unpacking...");
BitstreamOut bout = { got, bits_per_sample * n, 0};
int j =0;
- for (j = 0; j * bits_per_sample < n * 8 && j < sizeof(GraphBuffer); j++) {
+ 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;
}
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.
+ #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.");
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;
return 0;
}
-/*
- * Manchester demodulate a bitstream. The bitstream needs to be already in
- * the GraphBuffer as 0 and 1 values
- *
- * Give the clock rate as argument in order to help the sync - the algorithm
- * resyncs at each pulse anyway.
- *
- * Not optimized by any means, this is the 1st time I'm writing this type of
- * routine, feel free to improve...
- *
- * 1st argument: clock rate (as number of samples per clock rate)
- * Typical values can be 64, 32, 128...
- */
-int CmdManchesterDemod(const char *Cmd)
-{
- int i, j, invert= 0;
- int bit;
- int clock;
- int lastval = 0;
- int low = 0;
- int high = 0;
- int hithigh, hitlow, first;
- int lc = 0;
- int bitidx = 0;
- int bit2idx = 0;
- int warnings = 0;
-
- /* check if we're inverting output */
- if (*Cmd == 'i')
- {
- PrintAndLog("Inverting output");
- invert = 1;
- ++Cmd;
- do
- ++Cmd;
- while(*Cmd == ' '); // in case a 2nd argument was given
- }
-
- /* Holds the decoded bitstream: each clock period contains 2 bits */
- /* later simplified to 1 bit after manchester decoding. */
- /* Add 10 bits to allow for noisy / uncertain traces without aborting */
- /* int BitStream[GraphTraceLen*2/clock+10]; */
-
- /* But it does not work if compiling on WIndows: therefore we just allocate a */
- /* large array */
- uint8_t BitStream[MAX_GRAPH_TRACE_LEN] = {0};
-
- /* Detect high and lows */
- for (i = 0; i < GraphTraceLen; i++)
- {
- if (GraphBuffer[i] > high)
- high = GraphBuffer[i];
- else if (GraphBuffer[i] < low)
- low = GraphBuffer[i];
- }
-
- /* Get our clock */
- clock = GetAskClock(Cmd, high, 1);
-
- int tolerance = clock/4;
-
- /* Detect first transition */
- /* Lo-Hi (arbitrary) */
- /* skip to the first high */
- for (i= 0; i < GraphTraceLen; i++)
- if (GraphBuffer[i] == high)
- break;
- /* now look for the first low */
- for (; i < GraphTraceLen; i++)
- {
- if (GraphBuffer[i] == low)
- {
- lastval = i;
- break;
- }
- }
-
- /* If we're not working with 1/0s, demod based off clock */
- if (high != 1)
- {
- bit = 0; /* We assume the 1st bit is zero, it may not be
- * the case: this routine (I think) has an init problem.
- * Ed.
- */
- for (; i < (int)(GraphTraceLen / clock); i++)
- {
- hithigh = 0;
- hitlow = 0;
- first = 1;
-
- /* Find out if we hit both high and low peaks */
- for (j = 0; j < clock; j++)
- {
- if (GraphBuffer[(i * clock) + j] == high)
- hithigh = 1;
- else if (GraphBuffer[(i * clock) + j] == low)
- hitlow = 1;
-
- /* it doesn't count if it's the first part of our read
- because it's really just trailing from the last sequence */
- if (first && (hithigh || hitlow))
- hithigh = hitlow = 0;
- else
- first = 0;
-
- if (hithigh && hitlow)
- break;
- }
-
- /* If we didn't hit both high and low peaks, we had a bit transition */
- if (!hithigh || !hitlow)
- bit ^= 1;
-
- BitStream[bit2idx++] = bit ^ invert;
- }
- }
-
- /* standard 1/0 bitstream */
- else
- {
-
- /* Then detect duration between 2 successive transitions */
- for (bitidx = 1; i < GraphTraceLen; i++)
- {
- if (GraphBuffer[i-1] != GraphBuffer[i])
- {
- lc = i-lastval;
- lastval = i;
-
- // Error check: if bitidx becomes too large, we do not
- // have a Manchester encoded bitstream or the clock is really
- // wrong!
- if (bitidx > (GraphTraceLen*2/clock+8) ) {
- PrintAndLog("Error: the clock you gave is probably wrong, aborting.");
- return 0;
- }
- // Then switch depending on lc length:
- // Tolerance is 1/4 of clock rate (arbitrary)
- if (abs(lc-clock/2) < tolerance) {
- // Short pulse : either "1" or "0"
- BitStream[bitidx++]=GraphBuffer[i-1];
- } else if (abs(lc-clock) < tolerance) {
- // Long pulse: either "11" or "00"
- BitStream[bitidx++]=GraphBuffer[i-1];
- BitStream[bitidx++]=GraphBuffer[i-1];
- } else {
- // Error
- warnings++;
- PrintAndLog("Warning: Manchester decode error for pulse width detection.");
- PrintAndLog("(too many of those messages mean either the stream is not Manchester encoded, or clock is wrong)");
-
- if (warnings > 10)
- {
- PrintAndLog("Error: too many detection errors, aborting.");
- return 0;
- }
- }
- }
- }
-
- // At this stage, we now have a bitstream of "01" ("1") or "10" ("0"), parse it into final decoded bitstream
- // Actually, we overwrite BitStream with the new decoded bitstream, we just need to be careful
- // to stop output at the final bitidx2 value, not bitidx
- for (i = 0; i < bitidx; i += 2) {
- if ((BitStream[i] == 0) && (BitStream[i+1] == 1)) {
- BitStream[bit2idx++] = 1 ^ invert;
- } else if ((BitStream[i] == 1) && (BitStream[i+1] == 0)) {
- BitStream[bit2idx++] = 0 ^ invert;
- } else {
- // We cannot end up in this state, this means we are unsynchronized,
- // move up 1 bit:
- i++;
- warnings++;
- PrintAndLog("Unsynchronized, resync...");
- PrintAndLog("(too many of those messages mean the stream is not Manchester encoded)");
-
- if (warnings > 10)
- {
- PrintAndLog("Error: too many decode errors, aborting.");
- return 0;
- }
- }
- }
- }
-
- PrintAndLog("Manchester decoded bitstream");
- // Now output the bitstream to the scrollback by line of 16 bits
- for (i = 0; i < (bit2idx-16); i+=16) {
- PrintAndLog("%i %i %i %i %i %i %i %i %i %i %i %i %i %i %i %i",
- BitStream[i],
- BitStream[i+1],
- BitStream[i+2],
- BitStream[i+3],
- BitStream[i+4],
- BitStream[i+5],
- BitStream[i+6],
- BitStream[i+7],
- BitStream[i+8],
- BitStream[i+9],
- BitStream[i+10],
- BitStream[i+11],
- BitStream[i+12],
- BitStream[i+13],
- BitStream[i+14],
- BitStream[i+15]);
- }
- return 0;
-}
-
-/* Modulate our data into manchester */
-int CmdManchesterMod(const char *Cmd)
-{
- int i, j;
- int clock;
- int bit, lastbit, wave;
-
- /* Get our clock */
- clock = GetAskClock(Cmd, 0, 1);
-
- wave = 0;
- lastbit = 1;
- for (i = 0; i < (int)(GraphTraceLen / clock); i++)
- {
- bit = GraphBuffer[i * clock] ^ 1;
-
- for (j = 0; j < (int)(clock/2); j++)
- GraphBuffer[(i * clock) + j] = bit ^ lastbit ^ wave;
- for (j = (int)(clock/2); j < clock; j++)
- GraphBuffer[(i * clock) + j] = bit ^ lastbit ^ wave ^ 1;
-
- /* Keep track of how we start our wave and if we changed or not this time */
- wave ^= bit ^ lastbit;
- lastbit = bit;
- }
-
- RepaintGraphWindow();
- return 0;
-}
-
int CmdNorm(const char *Cmd)
{
int i;
return 0;
}
-int CmdThreshold(const char *Cmd)
-{
- int threshold = atoi(Cmd);
-
- for (int i = 0; i < GraphTraceLen; ++i) {
- if (GraphBuffer[i] >= threshold)
- GraphBuffer[i] = 1;
- else
- GraphBuffer[i] = -1;
- }
- RepaintGraphWindow();
- return 0;
-}
-
int CmdDirectionalThreshold(const char *Cmd)
{
int8_t upThres = param_get8(Cmd, 0);
static command_t CommandTable[] =
{
{"help", CmdHelp, 1, "This help"},
- {"amp", CmdAmp, 1, "Amplify peaks"},
- //{"askdemod", Cmdaskdemod, 1, "<0 or 1> -- Attempt to demodulate simple ASK tags"},
- {"askedgedetect", CmdAskEdgeDetect, 1, "[threshold] Adjust Graph for manual ask demod using length of sample differences to detect the edge of a wave (default = 25)"},
+ {"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)"},
{"askem410xdemod", CmdAskEM410xDemod, 1, "[clock] [invert<0|1>] [maxErr] -- Demodulate an EM410x tag from GraphBuffer (args optional)"},
{"askgproxiidemod", CmdG_Prox_II_Demod, 1, "Demodulate a G Prox II tag from GraphBuffer"},
{"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
- {"biphaserawdecode",CmdBiphaseDecodeRaw,1,"[offset] [invert<0|1>] Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
+ {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
{"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
- //{"bitstream", CmdBitstream, 1, "[clock rate] -- Convert waveform into a bitstream"},
{"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)"},
- //{"fskdemod", CmdFSKdemod, 1, "Demodulate graph window as a HID FSK"},
+ {"fdxbdemod", CmdFDXBdemodBI , 1, "Demodulate a FDX-B ISO11784/85 Biphase tag from GraphBuffer"},
{"fskawiddemod", CmdFSKdemodAWID, 1, "Demodulate an AWID FSK tag from GraphBuffer"},
//{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},
{"fskhiddemod", CmdFSKdemodHID, 1, "Demodulate a HID FSK tag from GraphBuffer"},
{"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"},
- //{"mandemod", CmdManchesterDemod, 1, "[i] [clock rate] -- Manchester demodulate binary stream (option 'i' to invert output)"},
- {"manrawdecode", Cmdmandecoderaw, 1, "Manchester decode binary stream in DemodBuffer"},
- {"manmod", CmdManchesterMod, 1, "[clock rate] -- Manchester modulate a binary stream"},
+ {"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] -- print the data in the DemodBuffer - 'x' for hex output"},
+ {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> -- print the data in the DemodBuffer - 'x' for hex output"},
{"pskindalademod", CmdIndalaDecode, 1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},
+ {"psknexwatchdemod",CmdPSKNexWatch, 1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"},
{"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)"},
{"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
{"setdebugmode", CmdSetDebugMode, 1, "<0|1> -- Turn on or off Debugging Mode for demods"},
{"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
- //{"threshold", CmdThreshold, 1, "<threshold> -- Maximize/minimize every value in the graph window depending on threshold"},
{"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"},
projects / proxmark3-svn / blobdiff