#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-//#include <inttypes.h>
#include <limits.h>
#include "proxmark3.h"
#include "data.h"
return 0;
}
-void printBitStream(uint8_t BitStream[], uint32_t bitLen){
+//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;
}
+//by marshmellow
void printEM410x(uint64_t id)
{
if (id !=0){
return;
}
+//by marshmellow
int CmdEm410xDecode(const char *Cmd)
{
uint64_t id=0;
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
uint32_t i=0;
- for (i=0;i<GraphTraceLen;++i){
- BitStream[i]=(uint8_t)(GraphBuffer[i]+128);
- }
+ i=getFromGraphBuf(BitStream);
id = Em410xDecode(BitStream,i);
printEM410x(id);
+ if (id>0) return 1;
return 0;
}
-int getFromGraphBuf(uint8_t *buff)
-{
- uint32_t i;
- for (i=0;i<GraphTraceLen;++i)
- buff[i]=(uint8_t)(GraphBuffer[i]+128);
- return i;
-}
-
//by marshmellow
//takes 2 arguments - clock and invert both as integers
//attempts to demodulate ask while decoding manchester
int errCnt=0;
errCnt = askmandemod(BitStream, &BitLen,&clk,&invert);
if (errCnt==-1){ //if fatal error (or -1)
- PrintAndLog("no data found");
+ //PrintAndLog("no data found");
return 0;
}
PrintAndLog("Using Clock: %d and invert=%d",clk,invert);
+ //no longer put BitStream back into GraphBuffer...
//PrintAndLog("Data start pos:%d, lastBit:%d, stop pos:%d, numBits:%d",iii,lastBit,i,bitnum);
//move BitStream back to GraphBuffer
/*
GraphTraceLen=bitnum;
RepaintGraphWindow();
*/
- //output
+ //output
if (errCnt>0){
PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
}
printBitStream(BitStream,BitLen);
uint64_t lo =0;
lo = Em410xDecode(BitStream,BitLen);
- printEM410x(lo);
-
+ if (lo>0){
+ //set GraphBuffer for clone or sim command
+ setGraphBuf(BitStream,BitLen);
+ PrintAndLog("EM410x pattern found: ");
+ printEM410x(lo);
+ }
+ if (BitLen>16) return 1;
return 0;
}
//by marshmellow
-//biphase demod = 10 (or 01)=1 / 00 (or 11)=0
-
-
-//by marshmellow
-//manchester demod
+//manchester decode
//stricktly take 10 and 01 and convert to 0 and 1
int Cmdmandecoderaw(const char *Cmd)
{
return 0;
}
bitnum=i;
- errCnt=manrawdemod(BitStream,&bitnum);
+ errCnt=manrawdecode(BitStream,&bitnum);
if (errCnt>=20){
PrintAndLog("Too many errors: %d",errCnt);
return 0;
id = Em410xDecode(BitStream,i);
printEM410x(id);
}
- return 0;
+ return 1;
+}
+
+//by marshmellow
+//biphase decode
+//take 01 or 10 = 0 and 11 or 00 = 1
+//takes 1 argument "offset" default = 0 if 1 it will shift the decode by one bit
+// 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
+int CmdBiphaseDecodeRaw(const char *Cmd)
+{
+ int i = 0;
+ int errCnt=0;
+ int bitnum=0;
+ int offset=0;
+ int high=0, low=0;
+ sscanf(Cmd, "%i", &offset);
+ uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+ //get graphbuffer & high and low
+ for (;i<GraphTraceLen;++i){
+ if(GraphBuffer[i]>high)high=GraphBuffer[i];
+ else if(GraphBuffer[i]<low)low=GraphBuffer[i];
+ BitStream[i]=GraphBuffer[i];
+ }
+ if (high>1 || low <0){
+ PrintAndLog("Error: please raw demod the wave first then decode");
+ return 0;
+ }
+ bitnum=i;
+ errCnt=BiphaseRawDecode(BitStream,&bitnum, offset);
+ if (errCnt>=20){
+ PrintAndLog("Too many errors attempting to decode: %d",errCnt);
+ return 0;
+ }
+ PrintAndLog("Biphase Decoded using offset: %d - # errors:%d - data:",offset,errCnt);
+ printBitStream(BitStream,bitnum);
+ PrintAndLog("\nif bitstream does not look right try offset=1");
+ return 1;
}
+
//by marshmellow
//takes 2 arguments - clock and invert both as integers
//attempts to demodulate ask only
}
/* Print our clock rate */
+// uses data from graphbuffer
int CmdDetectClockRate(const char *Cmd)
{
- int clock = DetectClock(0);
- PrintAndLog("Auto-detected clock rate: %d", clock);
+ GetClock("",0,0);
+ //int clock = DetectASKClock(0);
+ //PrintAndLog("Auto-detected clock rate: %d", clock);
return 0;
}
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
uint32_t BitLen = getFromGraphBuf(BitStream);
int size = fskdemod(BitStream,BitLen,rfLen,invert);
-
- PrintAndLog("FSK decoded bitstream:");
- ClearGraph(0);
- for (i=0;i<size;++i){
- GraphBuffer[i]=BitStream[i];
+ if (size>0){
+ PrintAndLog("FSK decoded bitstream:");
+ ClearGraph(0);
+ for (i=0;i<size;++i){
+ GraphBuffer[i]=BitStream[i];
+ }
+ GraphTraceLen=size;
+ RepaintGraphWindow();
+
+ // 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
+ printBitStream(BitStream,size);
+ } else{
+ PrintAndLog("no FSK data found");
}
- GraphTraceLen=size;
- RepaintGraphWindow();
-
- // 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
- printBitStream(BitStream,size);
return 0;
}
PrintAndLog("Error demoding fsk");
return 0;
}
+ if (hi2==0 && hi==0 && lo==0) return 0;
if (hi2 != 0){ //extra large HID tags
PrintAndLog("TAG ID: %x%08x%08x (%d)",
(unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
+ setGraphBuf(BitStream,BitLen);
+ return 1;
}
else { //standard HID tags <38 bits
//Dbprintf("TAG ID: %x%08x (%d)",(unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF); //old print cmd
- uint8_t bitlen = 0;
+ uint8_t fmtLen = 0;
uint32_t fc = 0;
uint32_t cardnum = 0;
if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
lo2=lo2>>1;
idx3++;
}
- bitlen =idx3+19;
+ fmtLen =idx3+19;
fc =0;
cardnum=0;
- if(bitlen==26){
+ if(fmtLen==26){
cardnum = (lo>>1)&0xFFFF;
fc = (lo>>17)&0xFF;
}
- if(bitlen==37){
+ if(fmtLen==37){
cardnum = (lo>>1)&0x7FFFF;
fc = ((hi&0xF)<<12)|(lo>>20);
}
- if(bitlen==34){
+ if(fmtLen==34){
cardnum = (lo>>1)&0xFFFF;
fc= ((hi&1)<<15)|(lo>>17);
}
- if(bitlen==35){
+ if(fmtLen==35){
cardnum = (lo>>1)&0xFFFFF;
fc = ((hi&1)<<11)|(lo>>21);
}
}
else { //if bit 38 is not set then 37 bit format is used
- bitlen= 37;
+ fmtLen= 37;
fc =0;
cardnum=0;
- if(bitlen==37){
+ if(fmtLen==37){
cardnum = (lo>>1)&0x7FFFF;
fc = ((hi&0xF)<<12)|(lo>>20);
}
}
PrintAndLog("TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
(unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
- (unsigned int) bitlen, (unsigned int) fc, (unsigned int) cardnum);
- return 0;
+ (unsigned int) fmtLen, (unsigned int) fc, (unsigned int) cardnum);
+ setGraphBuf(BitStream,BitLen);
+ return 1;
}
return 0;
}
//raw fsk demod no manchester decoding no start bit finding just get binary from wave
//set defaults
int idx=0;
- //test samples are not just noise
- if (GraphTraceLen < 64) return 0;
+ //something in graphbuffer
+ if (GraphTraceLen < 65) return 0;
uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
uint32_t BitLen = getFromGraphBuf(BitStream);
//get binary from fsk wave
+ // PrintAndLog("DEBUG: got buff");
idx = IOdemodFSK(BitStream,BitLen);
if (idx<0){
- PrintAndLog("Error demoding fsk");
+ //PrintAndLog("Error demoding fsk");
return 0;
}
+ // PrintAndLog("DEBUG: Got IOdemodFSK");
if (idx==0){
- PrintAndLog("IO Prox Data not found - FSK Data:");
- printBitStream(BitStream,92);
+ //PrintAndLog("IO Prox Data not found - FSK Data:");
+ //if (BitLen > 92) printBitStream(BitStream,92);
+ return 0;
}
//Index map
//0 10 20 30 40 50 60
//
//XSF(version)facility:codeone+codetwo (raw)
//Handle the data
-
+ if (idx+64>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]);
PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx+9], BitStream[idx+10], BitStream[idx+11],BitStream[idx+12],BitStream[idx+13],BitStream[idx+14],BitStream[idx+15],BitStream[idx+16],BitStream[idx+17]);
PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx+18], BitStream[idx+19], BitStream[idx+20],BitStream[idx+21],BitStream[idx+22],BitStream[idx+23],BitStream[idx+24],BitStream[idx+25],BitStream[idx+26]);
uint16_t number = (bytebits_to_byte(BitStream+idx+36,8)<<8)|(bytebits_to_byte(BitStream+idx+45,8)); //36,9
PrintAndLog("XSF(%02d)%02x:%d (%08x%08x)",version,facilitycode,number,code,code2);
- return 0;
+ setGraphBuf(BitStream,BitLen);
+ return 1;
}
int CmdFSKdemod(const char *Cmd) //old CmdFSKdemod needs updating
{
int CmdTuneSamples(const char *Cmd)
{
- int timeout = 0;
- printf("\nMeasuring antenna characteristics, please wait...");
-
- UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING};
- 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);
- if (peakv<2000)
- PrintAndLog("# Your LF antenna is unusable.");
- else if (peakv<10000)
- PrintAndLog("# Your LF antenna is marginal.");
- if (vHf<2000)
- PrintAndLog("# Your HF antenna is unusable.");
- else if (vHf<5000)
- PrintAndLog("# Your HF antenna is marginal.");
-
- for (int i = 0; i < 256; i++) {
- GraphBuffer[i] = resp.d.asBytes[i] - 128;
- }
-
- PrintAndLog("Done! Divisor 89 is 134khz, 95 is 125khz.\n");
- PrintAndLog("\n");
- GraphTraceLen = 256;
- ShowGraphWindow();
+ int cnt = 0;
+ int n = 255;
+ uint8_t got[255];
- return 0;
+ PrintAndLog("Reading %d samples\n", n);
+ GetFromBigBuf(got,n,7256); // armsrc/apps.h: #define FREE_BUFFER_OFFSET 7256
+ WaitForResponse(CMD_ACK,NULL);
+ for (int j = 0; j < n; j++) {
+ GraphBuffer[cnt++] = ((int)got[j]) - 128;
+ }
+
+ PrintAndLog("Done! Divisor 89 is 134khz, 95 is 125khz.\n");
+ PrintAndLog("\n");
+ GraphTraceLen = n;
+ RepaintGraphWindow();
+ return 0;
}
-
int CmdLoad(const char *Cmd)
{
FILE *f = fopen(Cmd, "r");
{"askmandemod", Cmdaskmandemod, 1, "[clock] [invert<0 or 1>] -- Attempt to demodulate ASK/Manchester tags and output binary (args optional[clock will try Auto-detect])"},
{"askrawdemod", Cmdaskrawdemod, 1, "[clock] [invert<0 or 1>] -- Attempt to demodulate ASK tags and output binary (args optional[clock will try Auto-detect])"},
{"autocorr", CmdAutoCorr, 1, "<window length> -- Autocorrelation over window"},
+ {"biphaserawdecode",CmdBiphaseDecodeRaw,1,"[offset] Biphase decode binary stream already in graph buffer (offset = bit to start decode from)"},
{"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, "Detect clock rate"},
+ {"detectaskclock",CmdDetectClockRate, 1, "Detect ASK clock rate"},
{"fskdemod", CmdFSKdemod, 1, "Demodulate graph window as a HID FSK"},
{"fskhiddemod", CmdFSKdemodHID, 1, "Demodulate graph window as a HID FSK using raw"},
{"fskiodemod", CmdFSKdemodIO, 1, "Demodulate graph window as an IO Prox FSK using raw"},
projects / proxmark3-svn / blobdiff