]> git.zerfleddert.de Git - proxmark3-svn/blobdiff - armsrc/lfops.c
Re-submitting Midnitesnake's Mifare Ultralight Patch
[proxmark3-svn] / armsrc / lfops.c
index 8d4e2dc9c84e903e23d9051cde65eaafd6f07cac..76c4b44e7f1090c5193ceefdb2ae5ea269db407c 100644 (file)
 #include "crc16.h"
 #include "string.h"
 
-void AcquireRawAdcSamples125k(int at134khz)
+void AcquireRawAdcSamples125k(int divisor)
 {
-       if (at134khz)
+       if ( (divisor == 1) || (divisor < 0) || (divisor > 255) )
                FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz
-       else
+       else if (divisor == 0)
                FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
+       else
+               FpgaSendCommand(FPGA_CMD_SET_DIVISOR, divisor);
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
 
@@ -805,6 +807,264 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
        }
 }
 
+void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
+{
+       uint8_t *dest = (uint8_t *)BigBuf;
+       int m=0, n=0, i=0, idx=0, lastval=0;
+       int found=0;
+       uint32_t code=0, code2=0;
+       //uint32_t hi2=0, hi=0, lo=0;
+
+       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER);
+
+       // Connect the A/D to the peak-detected low-frequency path.
+       SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
+
+       // Give it a bit of time for the resonant antenna to settle.
+       SpinDelay(50);
+
+       // Now set up the SSC to get the ADC samples that are now streaming at us.
+       FpgaSetupSsc();
+
+       for(;;) {
+               WDT_HIT();
+               if (ledcontrol)
+                       LED_A_ON();
+               if(BUTTON_PRESS()) {
+                       DbpString("Stopped");
+                       if (ledcontrol)
+                               LED_A_OFF();
+                       return;
+               }
+
+               i = 0;
+               m = sizeof(BigBuf);
+               memset(dest,128,m);
+               for(;;) {
+                       if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+                               AT91C_BASE_SSC->SSC_THR = 0x43;
+                               if (ledcontrol)
+                                       LED_D_ON();
+                       }
+                       if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
+                               dest[i] = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
+                               // 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
+                               if(dest[i] < 127) dest[i] = 0; else dest[i] = 1;
+                               i++;
+                               if (ledcontrol)
+                                       LED_D_OFF();
+                               if(i >= m) {
+                                       break;
+                               }
+                       }
+               }
+
+               // FSK demodulator
+
+               // sync to first lo-hi transition
+               for( idx=1; idx<m; idx++) {
+                       if (dest[idx-1]<dest[idx])
+                               lastval=idx;
+                               break;
+               }
+               WDT_HIT();
+
+               // 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( i=0; idx<m; idx++) {
+                       if (dest[idx-1]<dest[idx]) {
+                               dest[i]=idx-lastval;
+                               if (dest[i] <= 8) {
+                                               dest[i]=1;
+                               } else {
+                                               dest[i]=0;
+                               }
+
+                               lastval=idx;
+                               i++;
+                       }
+               }
+               m=i;
+               WDT_HIT();
+
+               // we now have a set of cycle counts, loop over previous results and aggregate data into bit patterns
+               lastval=dest[0];
+               idx=0;
+               i=0;
+               n=0;
+               for( idx=0; idx<m; idx++) {
+                       if (dest[idx]==lastval) {
+                               n++;
+                       } else {
+                               // a bit time is five fc/10 or six fc/8 cycles so figure out how many bits a pattern width represents,
+                               // an extra fc/8 pattern preceeds every 4 bits (about 200 cycles) just to complicate things but it gets
+                               // swallowed up by rounding
+                               // expected results are 1 or 2 bits, any more and it's an invalid manchester encoding
+                               // special start of frame markers use invalid manchester states (no transitions) by using sequences
+                               // like 111000
+                               if (dest[idx-1]) {
+                                       n=(n+1)/7;                      // fc/8 in sets of 7
+                               } else {
+                                       n=(n+1)/6;                      // fc/10 in sets of 6
+                               }
+                               switch (n) {                    // stuff appropriate bits in buffer
+                                       case 0:
+                                       case 1: // one bit
+                                               dest[i++]=dest[idx-1]^1;
+                                               //Dbprintf("%d",dest[idx-1]);
+                                               break;
+                                       case 2: // two bits
+                                               dest[i++]=dest[idx-1]^1;
+                                               dest[i++]=dest[idx-1]^1;
+                                               //Dbprintf("%d",dest[idx-1]);
+                                               //Dbprintf("%d",dest[idx-1]);
+                                               break;
+                                       case 3: // 3 bit start of frame markers
+                                               for(int j=0; j<3; j++){
+                                                 dest[i++]=dest[idx-1]^1;
+                                               //  Dbprintf("%d",dest[idx-1]);
+                                               }
+                                               break;
+                                       case 4:
+                                               for(int j=0; j<4; j++){
+                                                 dest[i++]=dest[idx-1]^1;
+                                               //  Dbprintf("%d",dest[idx-1]);
+                                               }
+                                               break;
+                                       case 5:
+                                               for(int j=0; j<5; j++){
+                                                 dest[i++]=dest[idx-1]^1;
+                                               //  Dbprintf("%d",dest[idx-1]);
+                                               }
+                                               break;
+                                       case 6:
+                                               for(int j=0; j<6; j++){
+                                                 dest[i++]=dest[idx-1]^1;
+                                               //  Dbprintf("%d",dest[idx-1]);
+                                               }
+                                               break;
+                                       case 7:
+                                               for(int j=0; j<7; j++){
+                                                 dest[i++]=dest[idx-1]^1;
+                                               //  Dbprintf("%d",dest[idx-1]);
+                                               }
+                                               break;
+                                       case 8:
+                                               for(int j=0; j<8; j++){
+                                                 dest[i++]=dest[idx-1]^1;
+                                               //  Dbprintf("%d",dest[idx-1]);
+                                               }
+                                               break;
+                                       case 9:
+                                               for(int j=0; j<9; j++){
+                                                 dest[i++]=dest[idx-1]^1;
+                                               //  Dbprintf("%d",dest[idx-1]);
+                                               }
+                                               break;
+                                       case 10:
+                                               for(int j=0; j<10; j++){
+                                                 dest[i++]=dest[idx-1]^1;
+                                               //  Dbprintf("%d",dest[idx-1]);
+                                               }
+                                               break;
+                                       case 11:
+                                               for(int j=0; j<11; j++){
+                                                 dest[i++]=dest[idx-1]^1;
+                                               //  Dbprintf("%d",dest[idx-1]);
+                                               }
+                                               break;
+                                       case 12:
+                                               for(int j=0; j<12; j++){
+                                                 dest[i++]=dest[idx-1]^1;
+                                                // Dbprintf("%d",dest[idx-1]);
+                                               }
+                                               break;
+                                       default:        // this shouldn't happen, don't stuff any bits
+                                               //Dbprintf("%d",dest[idx-1]);
+                                               break;
+                               }
+                               n=0;
+                               lastval=dest[idx];
+                       }
+               }//end for
+               /*for(int j=0; j<64;j+=8){
+                 Dbprintf("%d%d%d%d%d%d%d%d",dest[j],dest[j+1],dest[j+2],dest[j+3],dest[j+4],dest[j+5],dest[j+6],dest[j+7]);
+               }
+               Dbprintf("\n");*/
+               m=i;
+               WDT_HIT();
+               
+        for( idx=0; idx<m-9; idx++) {
+         if ( !(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])&& (dest[idx+9])){
+               found=1;
+               //idx+=9;
+               if (found) {
+                   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]);
+               
+                   short version='\x00';
+                   char unknown='\x00';
+                   uint16_t number=0;
+                   for(int j=14;j<18;j++){
+                      //Dbprintf("%d",dest[idx+j]);
+                      version <<=1;
+                      if (dest[idx+j]) version |= 1;
+                   }
+                   for(int j=19;j<27;j++){
+                      //Dbprintf("%d",dest[idx+j]);
+                      unknown <<=1;
+                      if (dest[idx+j]) unknown |= 1;
+                   }
+                   for(int j=36;j<45;j++){
+                      //Dbprintf("%d",dest[idx+j]);
+                      number <<=1;
+                      if (dest[idx+j]) number |= 1;
+                   }
+                   for(int j=46;j<53;j++){
+                      //Dbprintf("%d",dest[idx+j]);
+                      number <<=1;
+                      if (dest[idx+j]) number |= 1;
+                   }
+                   for(int j=0; j<32; j++){
+                       code <<=1;
+                       if(dest[idx+j]) code |= 1;
+                   }
+                   for(int j=32; j<64; j++){
+                       code2 <<=1;
+                       if(dest[idx+j]) code2 |= 1;
+                   }
+                   
+                   Dbprintf("XSF(%02d)%02x:%d (%08x%08x)",version,unknown,number,code,code2);
+                   if (ledcontrol)
+                       LED_D_OFF();
+               }
+               // if we're only looking for one tag 
+               if (findone){
+                       //*high = hi;
+                       //*low = lo;
+                       LED_A_OFF();
+                       return;
+               }
+      
+               //hi=0;
+               //lo=0;
+               found=0;
+         }
+               
+       }
+       }
+       WDT_HIT();
+}
+
 /*------------------------------
  * T5555/T5557/T5567 routines
  *------------------------------
@@ -1164,6 +1424,26 @@ void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT)
        DbpString("DONE!");
 }
 
+void CopyIOtoT55x7(uint32_t hi, uint32_t lo, uint8_t longFMT)
+{
+   int data1=0, data2=0; //up to six blocks for long format
+       
+    data1 = hi;  // load preamble
+    data2 = lo;
+    
+    LED_D_ON();
+    // Program the data blocks for supplied ID
+    // and the block 0 for HID format
+    T55xxWriteBlock(data1,1,0,0);
+    T55xxWriteBlock(data2,2,0,0);
+       
+    //Config Block
+    T55xxWriteBlock(0x00147040,0,0,0);
+    LED_D_OFF();
+       
+    DbpString("DONE!");
+}
+
 // Define 9bit header for EM410x tags
 #define EM410X_HEADER          0x1FF
 #define EM410X_ID_LENGTH       40
@@ -1175,6 +1455,7 @@ void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo)
        uint64_t rev_id = 0;    // reversed ID
        int c_parity[4];        // column parity
        int r_parity = 0;       // row parity
+       uint32_t clock = 0;
 
        // Reverse ID bits given as parameter (for simpler operations)
        for (i = 0; i < EM410X_ID_LENGTH; ++i) {
@@ -1232,12 +1513,35 @@ void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo)
        T55xxWriteBlock((uint32_t)id, 2, 0, 0);
 
        // Config for EM410x (RF/64, Manchester, Maxblock=2)
-       if (card)
+       if (card) {
+               // Clock rate is stored in bits 8-15 of the card value
+               clock = (card & 0xFF00) >> 8;
+               Dbprintf("Clock rate: %d", clock);
+               switch (clock)
+               {
+                       case 32:
+                               clock = T55x7_BITRATE_RF_32;
+                               break;
+                       case 16:
+                               clock = T55x7_BITRATE_RF_16;
+                               break;
+                       case 0:
+                               // A value of 0 is assumed to be 64 for backwards-compatibility
+                               // Fall through...
+                       case 64:
+                               clock = T55x7_BITRATE_RF_64;
+                               break;      
+                       default:
+                               Dbprintf("Invalid clock rate: %d", clock);
+                               return;
+               }
+
                // Writing configuration for T55x7 tag
-               T55xxWriteBlock(T55x7_BITRATE_RF_64         |
+               T55xxWriteBlock(clock       |
                                T55x7_MODULATION_MANCHESTER |
                                2 << T55x7_MAXBLOCK_SHIFT,
                                0, 0, 0);
+  }
        else
                // Writing configuration for T5555(Q5) tag
                T55xxWriteBlock(0x1F << T5555_BITRATE_SHIFT |
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