]> cvs.zerfleddert.de Git - proxmark3-svn/blobdiff - armsrc/lfops.c
Revert "problems creating pull request with the new traces"
[proxmark3-svn] / armsrc / lfops.c
index 7d497e3cc42c411ed83a02d9d59aa106fc90d4a4..894adef78c277a03db9e98f1a8ac81c374a8694d 100644 (file)
@@ -14,6 +14,7 @@
 #include "hitag2.h"
 #include "crc16.h"
 #include "string.h"
+#include "lfdemod.h"
 
 
 /**
@@ -630,85 +631,12 @@ void CmdHIDsimTAG(int hi, int lo, int ledcontrol)
                LED_A_OFF();
 }
 
-size_t fsk_demod(uint8_t * dest, size_t size)
-{
-       uint32_t last_transition = 0;
-       uint32_t idx = 1;
-
-       // we don't care about actual value, only if it's more or less than a
-       // threshold essentially we capture zero crossings for later analysis
-       uint8_t threshold_value = 127;
-
-       // sync to first lo-hi transition, and threshold
-
-       //Need to threshold first sample
-       if(dest[0] < threshold_value) dest[0] = 0;
-       else dest[0] = 1;
-
-       size_t numBits = 0;
-       // count cycles between consecutive lo-hi transitions, there should be either 8 (fc/8)
-       // or 10 (fc/10) cycles but in practice due to noise etc we may end up with with anywhere
-       // between 7 to 11 cycles so fuzz it by treat anything <9 as 8 and anything else as 10
-       for(idx = 1; idx < size; idx++) {
-               // threshold current value
-               if (dest[idx] < threshold_value) dest[idx] = 0;
-               else dest[idx] = 1;
-
-               // Check for 0->1 transition
-               if (dest[idx-1] < dest[idx]) { // 0 -> 1 transition
-
-                       if (idx-last_transition <  9) {
-                                       dest[numBits]=1;
-                       } else {
-                                       dest[numBits]=0;
-                       }
-                       last_transition = idx;
-                       numBits++;
-               }
-       }
-       return numBits; //Actually, it returns the number of bytes, but each byte represents a bit: 1 or 0
-}
-
-
-size_t aggregate_bits(uint8_t *dest,size_t size, uint8_t h2l_crossing_value,uint8_t l2h_crossing_value, uint8_t maxConsequtiveBits )
-{
-       uint8_t lastval=dest[0];
-       uint32_t idx=0;
-       size_t numBits=0;
-       uint32_t n=1;
-
-       for( idx=1; idx < size; idx++) {
-
-               if (dest[idx]==lastval) {
-                       n++;
-                       continue;
-               }
-               //if lastval was 1, we have a 1->0 crossing
-               if ( dest[idx-1] ) {
-                       n=(n+1) / h2l_crossing_value;
-               } else {// 0->1 crossing
-                       n=(n+1) / l2h_crossing_value;
-               }
-               if (n == 0) n = 1;
-
-               if(n < maxConsequtiveBits)
-               {
-                       memset(dest+numBits, dest[idx-1] , n);
-                       numBits += n;
-               }
-               n=0;
-               lastval=dest[idx];
-       }//end for
-
-       return numBits;
-
-}
-// loop to capture raw HID waveform then FSK demodulate the TAG ID from it
+// loop to get raw HID waveform then FSK demodulate the TAG ID from it
 void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
 {
        uint8_t *dest = (uint8_t *)BigBuf;
 
-       size_t size=0,idx=0; //, found=0;
+       size_t size=0; //, found=0;
        uint32_t hi2=0, hi=0, lo=0;
 
        // Configure to go in 125Khz listen mode
@@ -721,148 +649,195 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
 
                DoAcquisition125k_internal(-1,true);
                size  = sizeof(BigBuf);
-
+    if (size < 2000) continue; 
                // FSK demodulator
-               size = fsk_demod(dest, size);
-
-               // we now have a set of cycle counts, loop over previous results and aggregate data into bit patterns
-               // 1->0 : fc/8 in sets of 6
-               // 0->1 : fc/10 in sets of 5
-               size = aggregate_bits(dest,size, 6,5,5);
 
+               int bitLen = HIDdemodFSK(dest,size,&hi2,&hi,&lo);
+               
                WDT_HIT();
 
+               if (bitLen>0 && lo>0){
                // final loop, go over previously decoded manchester data and decode into usable tag ID
                // 111000 bit pattern represent start of frame, 01 pattern represents a 1 and 10 represents a 0
-               uint8_t frame_marker_mask[] = {1,1,1,0,0,0};
-               int numshifts = 0;
-               idx = 0;
-               while( idx + sizeof(frame_marker_mask) < size) {
-                       // search for a start of frame marker
-                       if ( memcmp(dest+idx, frame_marker_mask, sizeof(frame_marker_mask)) == 0)
-                       { // frame marker found
-                               idx+=sizeof(frame_marker_mask);
-
-                               while(dest[idx] != dest[idx+1] && idx < size-2)
-                               {       
-                                       // Keep going until next frame marker (or error)
-                                       // Shift in a bit. Start by shifting high registers
-                                       hi2 = (hi2<<1)|(hi>>31);
-                                       hi = (hi<<1)|(lo>>31);
-                                       //Then, shift in a 0 or one into low
-                                       if (dest[idx] && !dest[idx+1])  // 1 0
-                                               lo=(lo<<1)|0;
-                                       else // 0 1
-                                               lo=(lo<<1)|
-                                                               1;
-                                       numshifts ++;
-                                       idx += 2;
+                       if (hi2 != 0){ //extra large HID tags
+                               Dbprintf("TAG ID: %x%08x%08x (%d)",
+                                        (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
+                       }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;
+                               uint32_t fc = 0;
+                               uint32_t cardnum = 0;
+                               if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
+                                       uint32_t lo2=0;
+                                       lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
+                                       uint8_t idx3 = 1;
+                                       while(lo2>1){ //find last bit set to 1 (format len bit)
+                                               lo2=lo2>>1;
+                                               idx3++;
+                                       }
+                                       bitlen =idx3+19;  
+                                       fc =0;
+                                       cardnum=0;
+                                       if(bitlen==26){
+                                               cardnum = (lo>>1)&0xFFFF;
+                                               fc = (lo>>17)&0xFF;
+                                       }
+                                       if(bitlen==37){
+                                               cardnum = (lo>>1)&0x7FFFF;
+                                               fc = ((hi&0xF)<<12)|(lo>>20);
+                                       }
+                                       if(bitlen==34){
+                                               cardnum = (lo>>1)&0xFFFF;
+                                               fc= ((hi&1)<<15)|(lo>>17);
+                                       }
+                                       if(bitlen==35){
+                                               cardnum = (lo>>1)&0xFFFFF;
+                                               fc = ((hi&1)<<11)|(lo>>21);
+                                       }
                                }
-                               //Dbprintf("Num shifts: %d ", numshifts);
-                               // Hopefully, we read a tag and  hit upon the next frame marker
-                               if(idx + sizeof(frame_marker_mask) < size)
-                               {
-                                       if ( memcmp(dest+idx, frame_marker_mask, sizeof(frame_marker_mask)) == 0)
-                                       {
-                                               if (hi2 != 0){
-                                                       Dbprintf("TAG ID: %x%08x%08x (%d)",
-                                                                (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
-                                               }
-                                               else {
-                                                       Dbprintf("TAG ID: %x%08x (%d)",
-                                                        (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
-                                               }
+                               else { //if bit 38 is not set then 37 bit format is used
+                                       bitlen= 37;
+                                       fc =0;
+                                       cardnum=0;
+                                       if(bitlen==37){
+                                               cardnum = (lo>>1)&0x7FFFF;
+                                               fc = ((hi&0xF)<<12)|(lo>>20);
                                        }
-
                                }
-
-                               // reset
-                               hi2 = hi = lo = 0;
-                               numshifts = 0;
-                       }else
-                       {
-                               idx++;
+                                               //Dbprintf("TAG ID: %x%08x (%d)",
+                               // (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);                              
+                               Dbprintf("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);
                        }
+                       if (findone){
+                               if (ledcontrol) LED_A_OFF();
+                               return;
+                       }
+                       // reset
+                       hi2 = hi = lo = 0;
                }
                WDT_HIT();
-
-       }
+               //SpinDelay(50);
+       }       
        DbpString("Stopped");
        if (ledcontrol) LED_A_OFF();
 }
 
-uint32_t bytebits_to_byte(uint8_t* src, int numbits)
-{
-       uint32_t num = 0;
-       for(int i = 0 ; i < numbits ; i++)
-       {
-               num = (num << 1) | (*src);
-               src++;
-       }
-       return num;
-}
-
-
-void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
+void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol)
 {
        uint8_t *dest = (uint8_t *)BigBuf;
 
-       size_t size=0, idx=0;
-       uint32_t code=0, code2=0;
-
+       size_t size=0; //, found=0;
+       uint32_t bitLen=0;
+       int clk=0, invert=0, errCnt=0;
+       uint64_t lo=0;
        // Configure to go in 125Khz listen mode
        LFSetupFPGAForADC(95, true);
 
        while(!BUTTON_PRESS()) {
 
-
                WDT_HIT();
                if (ledcontrol) LED_A_ON();
 
                DoAcquisition125k_internal(-1,true);
                size  = sizeof(BigBuf);
-
+    if (size < 2000) continue; 
                // FSK demodulator
-               size = fsk_demod(dest, size);
+     //int askmandemod(uint8_t *BinStream,uint32_t *BitLen,int *clk, int *invert);
+    bitLen=size;
+    //Dbprintf("DEBUG: Buffer got");
+    errCnt = askmandemod(dest,&bitLen,&clk,&invert); //HIDdemodFSK(dest,size,&hi2,&hi,&lo);
+               //Dbprintf("DEBUG: ASK Got");
+               WDT_HIT();
 
-               // we now have a set of cycle counts, loop over previous results and aggregate data into bit patterns
-               // 1->0 : fc/8 in sets of 7
-               // 0->1 : fc/10 in sets of 6
-               size = aggregate_bits(dest, size, 7,6,13);
+               if (errCnt>=0){
+                       lo = Em410xDecode(dest,bitLen);
+                       //Dbprintf("DEBUG: EM GOT");
+               //printEM410x(lo);
+               if (lo>0){
+               Dbprintf("EM TAG ID: %02x%08x - (%05d_%03d_%08d)",(uint32_t)(lo>>32),(uint32_t)lo,(uint32_t)(lo&0xFFFF),(uint32_t)((lo>>16LL) & 0xFF),(uint32_t)(lo & 0xFFFFFF));
+       }
+                       if (findone){
+                               if (ledcontrol) LED_A_OFF();
+                               return;
+                       }
+               } else{
+                       //Dbprintf("DEBUG: No Tag");
+               }
+               WDT_HIT();
+               lo = 0;
+               clk=0;
+    invert=0;
+               errCnt=0;
+               size=0;
+               //SpinDelay(50);
+       }       
+       DbpString("Stopped");
+       if (ledcontrol) LED_A_OFF();
+}
 
+void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
+{
+       uint8_t *dest = (uint8_t *)BigBuf;
+       size_t size=0;
+       int idx=0;
+       uint32_t code=0, code2=0;
+  uint8_t version=0;
+  uint8_t facilitycode=0;
+  uint16_t number=0;
+       // Configure to go in 125Khz listen mode
+       LFSetupFPGAForADC(95, true);
+       
+       while(!BUTTON_PRESS()) {
                WDT_HIT();
-               
-               //Handle the data
-           uint8_t mask[] = {0,0,0,0,0,0,0,0,0,1};
-               for( idx=0; idx < size - 64; idx++) {
-
-               if ( memcmp(dest + idx, mask, sizeof(mask)) ) continue;
-
-                   Dbprintf("%d%d%d%d%d%d%d%d",dest[idx],   dest[idx+1],   dest[idx+2],dest[idx+3],dest[idx+4],dest[idx+5],dest[idx+6],dest[idx+7]);
-                   Dbprintf("%d%d%d%d%d%d%d%d",dest[idx+8], dest[idx+9], dest[idx+10],dest[idx+11],dest[idx+12],dest[idx+13],dest[idx+14],dest[idx+15]);                         
-                   Dbprintf("%d%d%d%d%d%d%d%d",dest[idx+16],dest[idx+17],dest[idx+18],dest[idx+19],dest[idx+20],dest[idx+21],dest[idx+22],dest[idx+23]);
-                   Dbprintf("%d%d%d%d%d%d%d%d",dest[idx+24],dest[idx+25],dest[idx+26],dest[idx+27],dest[idx+28],dest[idx+29],dest[idx+30],dest[idx+31]);
-                   Dbprintf("%d%d%d%d%d%d%d%d",dest[idx+32],dest[idx+33],dest[idx+34],dest[idx+35],dest[idx+36],dest[idx+37],dest[idx+38],dest[idx+39]);
-                   Dbprintf("%d%d%d%d%d%d%d%d",dest[idx+40],dest[idx+41],dest[idx+42],dest[idx+43],dest[idx+44],dest[idx+45],dest[idx+46],dest[idx+47]);
-                   Dbprintf("%d%d%d%d%d%d%d%d",dest[idx+48],dest[idx+49],dest[idx+50],dest[idx+51],dest[idx+52],dest[idx+53],dest[idx+54],dest[idx+55]);
-                   Dbprintf("%d%d%d%d%d%d%d%d",dest[idx+56],dest[idx+57],dest[idx+58],dest[idx+59],dest[idx+60],dest[idx+61],dest[idx+62],dest[idx+63]);
-                       
-                   code = bytebits_to_byte(dest+idx,32);
-                   code2 = bytebits_to_byte(dest+idx+32,32); 
-
-                   short version = bytebits_to_byte(dest+idx+14,4); 
-                   char unknown = bytebits_to_byte(dest+idx+19,8) ;
-                   uint16_t number = bytebits_to_byte(dest+idx+36,9); 
-                   
-                   Dbprintf("XSF(%02d)%02x:%d (%08x%08x)",version,unknown,number,code,code2);
-                   if (ledcontrol)     LED_D_OFF();
-               
+               if (ledcontrol) LED_A_ON();
+               DoAcquisition125k_internal(-1,true);
+               size  = sizeof(BigBuf);
+               //make sure buffer has data
+               if (size < 2000) continue;
+               //fskdemod and get start index
+               WDT_HIT();
+               idx = IOdemodFSK(dest,size);
+               if (idx>0){
+                       //valid tag found
+
+                       //Index map
+                       //0           10          20          30          40          50          60
+                       //|           |           |           |           |           |           |
+                       //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
+                       //-----------------------------------------------------------------------------
+                       //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
+                       //
+                       //XSF(version)facility:codeone+codetwo
+                       //Handle the data
+      if(findone){ //only print binary if we are doing one
+               Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx],   dest[idx+1],   dest[idx+2],dest[idx+3],dest[idx+4],dest[idx+5],dest[idx+6],dest[idx+7],dest[idx+8]);
+                   Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+9], dest[idx+10],dest[idx+11],dest[idx+12],dest[idx+13],dest[idx+14],dest[idx+15],dest[idx+16],dest[idx+17]);                         
+                   Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+18],dest[idx+19],dest[idx+20],dest[idx+21],dest[idx+22],dest[idx+23],dest[idx+24],dest[idx+25],dest[idx+26]);
+                   Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+27],dest[idx+28],dest[idx+29],dest[idx+30],dest[idx+31],dest[idx+32],dest[idx+33],dest[idx+34],dest[idx+35]);
+                   Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+36],dest[idx+37],dest[idx+38],dest[idx+39],dest[idx+40],dest[idx+41],dest[idx+42],dest[idx+43],dest[idx+44]);
+                   Dbprintf("%d%d%d%d%d%d%d%d %d",dest[idx+45],dest[idx+46],dest[idx+47],dest[idx+48],dest[idx+49],dest[idx+50],dest[idx+51],dest[idx+52],dest[idx+53]);
+                   Dbprintf("%d%d%d%d%d%d%d%d %d%d",dest[idx+54],dest[idx+55],dest[idx+56],dest[idx+57],dest[idx+58],dest[idx+59],dest[idx+60],dest[idx+61],dest[idx+62],dest[idx+63]);
+                       }
+                       code = bytebits_to_byte(dest+idx,32);
+           code2 = bytebits_to_byte(dest+idx+32,32); 
+           version = bytebits_to_byte(dest+idx+27,8); //14,4
+           facilitycode = bytebits_to_byte(dest+idx+18,8) ;
+           number = (bytebits_to_byte(dest+idx+36,8)<<8)|(bytebits_to_byte(dest+idx+45,8)); //36,9
+           
+           Dbprintf("XSF(%02d)%02x:%05d (%08x%08x)",version,facilitycode,number,code,code2);                   
                        // if we're only looking for one tag 
                        if (findone){
-                               LED_A_OFF();
+                               if (ledcontrol) LED_A_OFF();
+                               //LED_A_OFF();
                                return;
-                       }               
-               }
+                       }
+                       code=code2=0;
+                       version=facilitycode=0;
+                       number=0;
+                       idx=0;
+               }       
                WDT_HIT();
        }
        DbpString("Stopped");
@@ -950,7 +925,8 @@ void T55xxWriteBit(int bit)
 // Write one card block in page 0, no lock
 void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMode)
 {
-       unsigned int i;
+       //unsigned int i;  //enio adjustment 12/10/14
+       uint32_t i;
 
        FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
        FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
@@ -995,8 +971,8 @@ void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t PwdMod
 void T55xxReadBlock(uint32_t Block, uint32_t Pwd, uint8_t PwdMode)
 {
        uint8_t *dest = (uint8_t *)BigBuf;
-       int m=0, i=0;
-  
+       //int m=0, i=0; //enio adjustment 12/10/14
+       uint32_t m=0, i=0;
        FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
        m = sizeof(BigBuf);
   // Clear destination buffer before sending the command
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