fido fix (#775)

[proxmark3-svn] / armsrc / lfops.c

diff --git a/armsrc/lfops.c b/armsrc/lfops.c
index 4344742b66696cf173490c380401356c4af458db..1816bdcaf600f8f7e398a2108377b7083b2dc579 100644 (file)
--- a/armsrc/lfops.c
+++ b/armsrc/lfops.c
@@ -4,7 +4,7 @@
 // the license.
 //-----------------------------------------------------------------------------
 // Miscellaneous routines for low frequency tag operations.
 // the license.
 //-----------------------------------------------------------------------------
 // Miscellaneous routines for low frequency tag operations.

-// Tags supported here so far are Texas Instruments (TI), HID
+// Tags supported here so far are Texas Instruments (TI), HID, EM4x05, EM410x

 // Also routines for raw mode reading/simulating of LF waveform
 //-----------------------------------------------------------------------------
 
 // Also routines for raw mode reading/simulating of LF waveform
 //-----------------------------------------------------------------------------
 


@@ -28,51 +28,103 @@
  */
 void ModThenAcquireRawAdcSamples125k(uint32_t delay_off, uint32_t period_0, uint32_t period_1, uint8_t *command)
 {
  */
 void ModThenAcquireRawAdcSamples125k(uint32_t delay_off, uint32_t period_0, uint32_t period_1, uint8_t *command)
 {

+       // start timer
+       StartTicks();

 
 

-       int divisor_used = 95; // 125 KHz
-       // see if 'h' was specified
-
-       if (command[strlen((char *) command) - 1] == 'h')
-               divisor_used = 88; // 134.8 KHz
-
-       sample_config sc = { 0,0,1, divisor_used, 0};
-       setSamplingConfig(&sc);
-       //clear read buffer
-       BigBuf_Clear_keep_EM();
+       // use lf config settings
+       sample_config *sc = getSamplingConfig();

 
 

-       /* Make sure the tag is reset */
+       // Make sure the tag is reset

        FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);

-       SpinDelay(2500);
+       WaitMS(2500);
+
+       // clear read buffer (after fpga bitstream loaded...)
+       BigBuf_Clear_keep_EM();

 
 

-       LFSetupFPGAForADC(sc.divisor, 1);
+       // power on
+       LFSetupFPGAForADC(sc->divisor, 1);

 
        // And a little more time for the tag to fully power up
 
        // And a little more time for the tag to fully power up

-       SpinDelay(2000);
-
+       WaitMS(2000);
+       // if delay_off = 0 then just bitbang 1 = antenna on 0 = off for respective periods.
+       bool bitbang = delay_off == 0;

        // now modulate the reader field
        // now modulate the reader field

-       while(*command != '\0' && *command != ' ') {
+
+       if (bitbang) {
+               // HACK it appears the loop and if statements take up about 7us so adjust waits accordingly...
+               uint8_t hack_cnt = 7;
+               if (period_0 < hack_cnt || period_1 < hack_cnt) {
+                       DbpString("Warning periods cannot be less than 7us in bit bang mode");
+                       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+                       LED_D_OFF();
+                       return;
+               }
+
+               // hack2 needed---  it appears to take about 8-16us to turn the antenna back on 
+               // leading to ~ 1 to 2 125khz samples extra in every off period 
+               // so we should test for last 0 before next 1 and reduce period_0 by this extra amount...
+               // but is this time different for every antenna or other hw builds???  more testing needed
+
+               // prime cmd_len to save time comparing strings while modulating
+               int cmd_len = 0;
+               while(command[cmd_len] != '\0' && command[cmd_len] != ' ')
+                       cmd_len++;
+
+               int counter = 0;
+               bool off = false;
+               for (counter = 0; counter < cmd_len; counter++) {
+                       // if cmd = 0 then turn field off
+                       if (command[counter] == '0') {
+                               // if field already off leave alone (affects timing otherwise)
+                               if (off == false) {
+                                       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+                                       LED_D_OFF();
+                                       off = true;
+                               }
+                               // note we appear to take about 7us to switch over (or run the if statements/loop...)
+                               WaitUS(period_0-hack_cnt);
+                       // else if cmd = 1 then turn field on
+                       } else {
+                               // if field already on leave alone (affects timing otherwise)
+                               if (off) {
+                                       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
+                                       LED_D_ON();
+                                       off = false;
+                               }
+                               // note we appear to take about 7us to switch over (or run the if statements/loop...)
+                               WaitUS(period_1-hack_cnt);
+                       }
+               }
+       } else { // old mode of cmd read using delay as off period
+               while(*command != '\0' && *command != ' ') {
+                       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+                       LED_D_OFF();
+                       WaitUS(delay_off);
+                       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, sc->divisor);
+                       FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
+                       LED_D_ON();
+                       if(*(command++) == '0') {
+                               WaitUS(period_0);
+                       } else {
+                               WaitUS(period_1);
+                       }
+               }

                FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
                LED_D_OFF();
                FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
                LED_D_OFF();

-               SpinDelayUs(delay_off);
-               FpgaSendCommand(FPGA_CMD_SET_DIVISOR, sc.divisor);
-
-               FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
-               LED_D_ON();
-               if(*(command++) == '0')
-                       SpinDelayUs(period_0);
-               else
-                       SpinDelayUs(period_1);
+               WaitUS(delay_off);
+               FpgaSendCommand(FPGA_CMD_SET_DIVISOR, sc->divisor);

        }
        }

-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       LED_D_OFF();
-       SpinDelayUs(delay_off);
-       FpgaSendCommand(FPGA_CMD_SET_DIVISOR, sc.divisor);

 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
 
        // now do the read
        DoAcquisition_config(false, 0);
 
        FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
 
        // now do the read
        DoAcquisition_config(false, 0);

+
+       // Turn off antenna
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       // tell client we are done
+       cmd_send(CMD_ACK,0,0,0,0,0);

 }
 
 /* blank r/w tag data stream
 }
 
 /* blank r/w tag data stream


@@ -516,7 +568,7 @@ static void fcAll(uint8_t fc, int *n, uint8_t clock, uint16_t *modCnt)
        uint8_t wavesPerClock = clock/fc;
        uint8_t mod = clock % fc;    //modifier
        uint8_t modAdj = fc/mod;     //how often to apply modifier
        uint8_t wavesPerClock = clock/fc;
        uint8_t mod = clock % fc;    //modifier
        uint8_t modAdj = fc/mod;     //how often to apply modifier

-       bool modAdjOk = !(fc % mod); //if (fc % mod==0) modAdjOk=TRUE;
+       bool modAdjOk = !(fc % mod); //if (fc % mod==0) modAdjOk=true;

        // loop through clock - step field clock
        for (uint8_t idx=0; idx < wavesPerClock; idx++){
                // put 1/2 FC length 1's and 1/2 0's per field clock wave (to create the wave)
        // loop through clock - step field clock
        for (uint8_t idx=0; idx < wavesPerClock; idx++){
                // put 1/2 FC length 1's and 1/2 0's per field clock wave (to create the wave)


@@ -541,7 +593,7 @@ static void fcAll(uint8_t fc, int *n, uint8_t clock, uint16_t *modCnt)
 
 // prepare a waveform pattern in the buffer based on the ID given then
 // simulate a HID tag until the button is pressed
 
 // prepare a waveform pattern in the buffer based on the ID given then
 // simulate a HID tag until the button is pressed

-void CmdHIDsimTAG(int hi, int lo, int ledcontrol)
+void CmdHIDsimTAG(int hi2, int hi, int lo, int ledcontrol)

 {
        int n=0, i=0;
        /*
 {
        int n=0, i=0;
        /*


@@ -554,8 +606,8 @@ void CmdHIDsimTAG(int hi, int lo, int ledcontrol)
         nor 1 bits, they are special patterns (a = set of 12 fc8 and b = set of 10 fc10)
        */
 
         nor 1 bits, they are special patterns (a = set of 12 fc8 and b = set of 10 fc10)
        */
 

-       if (hi>0xFFF) {
-               DbpString("Tags can only have 44 bits. - USE lf simfsk for larger tags");
+       if (hi2>0x0FFFFFFF) {
+               DbpString("Tags can only have 44 or 84 bits. - USE lf simfsk for larger tags");

                return;
        }
        // set LF so we don't kill the bigbuf we are setting with simulation data.
                return;
        }
        // set LF so we don't kill the bigbuf we are setting with simulation data.


@@ -569,13 +621,35 @@ void CmdHIDsimTAG(int hi, int lo, int ledcontrol)
        fc(8,  &n);     fc(10, &n); // logical 0
 
        WDT_HIT();
        fc(8,  &n);     fc(10, &n); // logical 0
 
        WDT_HIT();

-       // manchester encode bits 43 to 32
-       for (i=11; i>=0; i--) {
-               if ((i%4)==3) fc(0,&n);
-               if ((hi>>i)&1) {
-                       fc(10, &n); fc(8,  &n);         // low-high transition
-               } else {
-                       fc(8,  &n); fc(10, &n);         // high-low transition
+       if (hi2 > 0 || hi > 0xFFF){
+               // manchester encode bits 91 to 64 (91-84 are part of the header)
+               for (i=27; i>=0; i--) {
+                       if ((i%4)==3) fc(0,&n);
+                       if ((hi2>>i)&1) {
+                               fc(10, &n); fc(8,  &n);         // low-high transition
+                       } else {
+                               fc(8,  &n); fc(10, &n);         // high-low transition
+                       }
+               }
+               WDT_HIT();
+               // manchester encode bits 63 to 32
+               for (i=31; i>=0; i--) {
+                       if ((i%4)==3) fc(0,&n);
+                       if ((hi>>i)&1) {
+                               fc(10, &n); fc(8,  &n);         // low-high transition
+                       } else {
+                               fc(8,  &n); fc(10, &n);         // high-low transition
+                       }
+               }
+       } else {
+               // manchester encode bits 43 to 32
+               for (i=11; i>=0; i--) {
+                       if ((i%4)==3) fc(0,&n);
+                       if ((hi>>i)&1) {
+                               fc(10, &n); fc(8,  &n);         // low-high transition
+                       } else {
+                               fc(8,  &n); fc(10, &n);         // high-low transition
+                       }

                }
        }
 
                }
        }
 


@@ -768,9 +842,9 @@ void CmdPSKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
 
        for (i=0; i<size; i++){
                if (BitStream[i] == curPhase){
 
        for (i=0; i<size; i++){
                if (BitStream[i] == curPhase){

-                       pskSimBit(carrier, &n, clk, &curPhase, FALSE);
+                       pskSimBit(carrier, &n, clk, &curPhase, false);

                } else {
                } else {

-                       pskSimBit(carrier, &n, clk, &curPhase, TRUE);
+                       pskSimBit(carrier, &n, clk, &curPhase, true);

                }
        }
        Dbprintf("Simulating with Carrier: %d, clk: %d, invert: %d, n: %d",carrier, clk, invert, n);
                }
        }
        Dbprintf("Simulating with Carrier: %d, clk: %d, invert: %d, n: %d",carrier, clk, invert, n);


@@ -787,7 +861,7 @@ void CmdPSKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream)
 }
 
 // loop to get 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)
+void CmdHIDdemodFSK(int findone, int *high2, int *high, int *low, int ledcontrol)

 {
        uint8_t *dest = BigBuf_get_addr();
        //const size_t sizeOfBigBuff = BigBuf_max_traceLen();
 {
        uint8_t *dest = BigBuf_get_addr();
        //const size_t sizeOfBigBuff = BigBuf_max_traceLen();


@@ -802,7 +876,6 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
        BigBuf_Clear_keep_EM();
 
        while(!BUTTON_PRESS() && !usb_poll_validate_length()) {
        BigBuf_Clear_keep_EM();
 
        while(!BUTTON_PRESS() && !usb_poll_validate_length()) {

-

                WDT_HIT();
                if (ledcontrol) LED_A_ON();
 
                WDT_HIT();
                if (ledcontrol) LED_A_ON();
 


@@ -813,60 +886,70 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
                idx = HIDdemodFSK(dest, &size, &hi2, &hi, &lo, &dummyIdx);
                
                if (idx>0 && lo>0 && (size==96 || size==192)){
                idx = HIDdemodFSK(dest, &size, &hi2, &hi, &lo, &dummyIdx);
                
                if (idx>0 && lo>0 && (size==96 || size==192)){

+                       uint8_t bitlen = 0;
+                       uint32_t fc = 0;
+                       uint32_t cardnum = 0;
+                       bool decoded = false;
+

                        // go over previously decoded manchester data and decode into usable tag ID
                        // go over previously decoded manchester data and decode into usable tag ID

-                       if (hi2 != 0){ //extra large HID tags  88/192 bits
-                               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 44/96 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);
-                                       }
+                       if ((hi2 & 0x000FFFF) != 0){ //extra large HID tags  88/192 bits
+                               uint32_t bp = hi2 & 0x000FFFFF;
+                               bitlen = 63;
+                               while (bp > 0) {
+                                       bp = bp >> 1;
+                                       bitlen++;

                                }
                                }

-                               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);
-                                       }
+                       } else if ((hi >> 6) > 0) {
+                               uint32_t bp = hi;
+                               bitlen = 31;
+                               while (bp > 0) {
+                                       bp = bp >> 1;
+                                       bitlen++;

                                }
                                }

-                               //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);
+                       } else if (((hi >> 5) & 1) == 0) {
+                               bitlen = 37;
+                       } else if ((hi & 0x0000001F) > 0 ) {
+                               uint32_t bp = (hi & 0x0000001F);
+                               bitlen = 31;
+                               while (bp > 0) {
+                                       bp = bp >> 1;
+                                       bitlen++;
+                               }
+                       } else {
+                               uint32_t bp = lo;
+                               bitlen = 0;
+                               while (bp > 0) {
+                                       bp = bp >> 1;
+                                       bitlen++;
+                               }
+                       }
+                       switch (bitlen){
+                               case 26:
+                                       cardnum = (lo>>1)&0xFFFF;
+                                       fc = (lo>>17)&0xFF;
+                                       decoded = true;
+                                       break;
+                               case 35:
+                                       cardnum = (lo>>1)&0xFFFFF;
+                                       fc = ((hi&1)<<11)|(lo>>21);
+                                       decoded = true;
+                                       break;

                        }
                        }

+                               
+                       if (hi2 != 0) //extra large HID tags  88/192 bits
+                               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);
+                       
+                       if (decoded)
+                               Dbprintf("Format Len: %dbits - FC: %d - Card: %d",
+                                       (unsigned int) bitlen, (unsigned int) fc, (unsigned int) cardnum);
+

                        if (findone){
                                if (ledcontrol) LED_A_OFF();
                        if (findone){
                                if (ledcontrol) LED_A_OFF();

+                               *high2 = hi2;

                                *high = hi;
                                *low = lo;
                                break;
                                *high = hi;
                                *low = lo;
                                break;


@@ -1334,8 +1417,8 @@ void WriteT55xx(uint32_t *blockdata, uint8_t startblock, uint8_t numblocks) {
        }
 }
 
        }
 }
 

-// Copy HID id to card and setup block 0 config
-void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT) {
+// Copy a HID-like card (e.g. HID Proximity, Paradox) to a T55x7 compatible card
+void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT, uint8_t preamble) {

        uint32_t data[] = {0,0,0,0,0,0,0};
        uint8_t last_block = 0;
 
        uint32_t data[] = {0,0,0,0,0,0,0};
        uint8_t last_block = 0;
 


@@ -1347,15 +1430,15 @@ void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT) {
                }
                // Build the 6 data blocks for supplied 84bit ID
                last_block = 6;
                }
                // Build the 6 data blocks for supplied 84bit ID
                last_block = 6;

-               // load preamble (1D) & long format identifier (9E manchester encoded)
-               data[1] = 0x1D96A900 | (manchesterEncode2Bytes((hi2 >> 16) & 0xF) & 0xFF);
+               // load preamble & long format identifier (9E manchester encoded)
+               data[1] = (preamble << 24) | 0x96A900 | (manchesterEncode2Bytes((hi2 >> 16) & 0xF) & 0xFF);

                // load raw id from hi2, hi, lo to data blocks (manchester encoded)
                data[2] = manchesterEncode2Bytes(hi2 & 0xFFFF);
                data[3] = manchesterEncode2Bytes(hi >> 16);
                data[4] = manchesterEncode2Bytes(hi & 0xFFFF);
                data[5] = manchesterEncode2Bytes(lo >> 16);
                data[6] = manchesterEncode2Bytes(lo & 0xFFFF);
                // load raw id from hi2, hi, lo to data blocks (manchester encoded)
                data[2] = manchesterEncode2Bytes(hi2 & 0xFFFF);
                data[3] = manchesterEncode2Bytes(hi >> 16);
                data[4] = manchesterEncode2Bytes(hi & 0xFFFF);
                data[5] = manchesterEncode2Bytes(lo >> 16);
                data[6] = manchesterEncode2Bytes(lo & 0xFFFF);

-       }       else {
+       } else {

                // Ensure no more than 44 bits supplied
                if (hi>0xFFF) {
                        DbpString("Tags can only have 44 bits.");
                // Ensure no more than 44 bits supplied
                if (hi>0xFFF) {
                        DbpString("Tags can only have 44 bits.");


@@ -1364,7 +1447,7 @@ void CopyHIDtoT55x7(uint32_t hi2, uint32_t hi, uint32_t lo, uint8_t longFMT) {
                // Build the 3 data blocks for supplied 44bit ID
                last_block = 3;
                // load preamble
                // Build the 3 data blocks for supplied 44bit ID
                last_block = 3;
                // load preamble

-               data[1] = 0x1D000000 | (manchesterEncode2Bytes(hi) & 0xFFFFFF);
+               data[1] = (preamble << 24) | (manchesterEncode2Bytes(hi) & 0xFFFFFF);

                data[2] = manchesterEncode2Bytes(lo >> 16);
                data[3] = manchesterEncode2Bytes(lo & 0xFFFF);
        }
                data[2] = manchesterEncode2Bytes(lo >> 16);
                data[3] = manchesterEncode2Bytes(lo & 0xFFFF);
        }


@@ -1766,7 +1849,7 @@ void Cotag(uint32_t arg0) {
        SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
 
        // Now set up the SSC to get the ADC samples that are now streaming at us.
        SetAdcMuxFor(GPIO_MUXSEL_LOPKD);
 
        // Now set up the SSC to get the ADC samples that are now streaming at us.

-       FpgaSetupSsc();
+       FpgaSetupSsc(FPGA_MAJOR_MODE_LF_ADC);

 
        // start clock - 1.5ticks is 1us
        StartTicks();
 
        // start clock - 1.5ticks is 1us
        StartTicks();