Various scripts from iceman

[proxmark3-svn] / armsrc / iclass.c

diff --git a/armsrc/iclass.c b/armsrc/iclass.c
index 37006e5126dd8f288f5ed1c95e757d8810fc5793..d5cd366dad9c1288403579b271739a21cb873928 100644 (file)
--- a/armsrc/iclass.c
+++ b/armsrc/iclass.c
@@ -48,33 +48,6 @@
 
 static int timeout = 4096;
 
 
 static int timeout = 4096;
 

-// CARD TO READER
-// Sequence D: 11110000 modulation with subcarrier during first half
-// Sequence E: 00001111 modulation with subcarrier during second half
-// Sequence F: 00000000 no modulation with subcarrier
-// READER TO CARD
-// Sequence X: 00001100 drop after half a period
-// Sequence Y: 00000000 no drop
-// Sequence Z: 11000000 drop at start
-#define        SEC_X 0x0c
-#define        SEC_Y 0x00
-#define        SEC_Z 0xc0
-
-// SAME AS IN iso14443a.
-#define RECV_CMD_OFFSET   3032
-#define RECV_RES_OFFSET   3096
-#define DMA_BUFFER_OFFSET 3160
-#define DMA_BUFFER_SIZE   4096
-#define TRACE_LENGTH      3000
-
-uint32_t SwapBits(uint32_t value, int nrbits) {
-       int i;
-       uint32_t newvalue = 0;
-       for(i = 0; i < nrbits; i++) {
-               newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
-       }
-       return newvalue;
-}

 
 static int SendIClassAnswer(uint8_t *resp, int respLen, int delay);
 
 
 static int SendIClassAnswer(uint8_t *resp, int respLen, int delay);
 


@@ -682,12 +655,7 @@ static RAMFUNC int ManchesterDecoding(int v)
 //-----------------------------------------------------------------------------
 void RAMFUNC SnoopIClass(void)
 {
 //-----------------------------------------------------------------------------
 void RAMFUNC SnoopIClass(void)
 {

-// DEFINED ABOVE
-// #define RECV_CMD_OFFSET   3032
-// #define RECV_RES_OFFSET   3096
-// #define DMA_BUFFER_OFFSET 3160
-// #define DMA_BUFFER_SIZE   4096
-// #define TRACE_LENGTH      3000
+

 
     // We won't start recording the frames that we acquire until we trigger;
     // a good trigger condition to get started is probably when we see a
 
     // We won't start recording the frames that we acquire until we trigger;
     // a good trigger condition to get started is probably when we see a


@@ -697,17 +665,15 @@ void RAMFUNC SnoopIClass(void)
     // The command (reader -> tag) that we're receiving.
        // The length of a received command will in most cases be no more than 18 bytes.
        // So 32 should be enough!
     // The command (reader -> tag) that we're receiving.
        // The length of a received command will in most cases be no more than 18 bytes.
        // So 32 should be enough!

-    uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
+       uint8_t *readerToTagCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);

     // The response (tag -> reader) that we're receiving.
     // The response (tag -> reader) that we're receiving.

-    uint8_t *receivedResponse = (((uint8_t *)BigBuf) + RECV_RES_OFFSET);
+       uint8_t *tagToReaderResponse = (((uint8_t *)BigBuf) + RECV_RES_OFFSET);

 
 

-    // As we receive stuff, we copy it from receivedCmd or receivedResponse
-    // into trace, along with its length and other annotations.
-    //uint8_t *trace = (uint8_t *)BigBuf;
-    
+    FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+ 

     // reset traceLen to 0
     iso14a_set_tracing(TRUE);
     // reset traceLen to 0
     iso14a_set_tracing(TRUE);

-    iso14a_clear_tracelen();
+    iso14a_clear_trace();

     iso14a_set_trigger(FALSE);
 
     // The DMA buffer, used to stream samples from the FPGA
     iso14a_set_trigger(FALSE);
 
     // The DMA buffer, used to stream samples from the FPGA


@@ -722,10 +688,8 @@ void RAMFUNC SnoopIClass(void)
     int samples = 0;
     rsamples = 0;
 
     int samples = 0;
     rsamples = 0;
 

-    memset(trace, 0x44, RECV_CMD_OFFSET);
-

     // Set up the demodulator for tag -> reader responses.
     // Set up the demodulator for tag -> reader responses.

-    Demod.output = receivedResponse;
+       Demod.output = tagToReaderResponse;

     Demod.len = 0;
     Demod.state = DEMOD_UNSYNCD;
 
     Demod.len = 0;
     Demod.state = DEMOD_UNSYNCD;
 


@@ -737,7 +701,7 @@ void RAMFUNC SnoopIClass(void)
 
     // And the reader -> tag commands
     memset(&Uart, 0, sizeof(Uart));
 
     // And the reader -> tag commands
     memset(&Uart, 0, sizeof(Uart));

-    Uart.output = receivedCmd;
+       Uart.output = readerToTagCmd;

     Uart.byteCntMax = 32; // was 100 (greg)////////////////////////////////////////////////////////////////////////
     Uart.state = STATE_UNSYNCD;
 
     Uart.byteCntMax = 32; // was 100 (greg)////////////////////////////////////////////////////////////////////////
     Uart.state = STATE_UNSYNCD;
 


@@ -747,6 +711,9 @@ void RAMFUNC SnoopIClass(void)
     FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_SNIFFER);
     SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
 
     FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_SNIFFER);
     SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
 

+       uint32_t time_0 = GetCountSspClk();
+
+

     int div = 0;
     //int div2 = 0;
     int decbyte = 0;
     int div = 0;
     //int div2 = 0;
     int decbyte = 0;


@@ -780,20 +747,13 @@ void RAMFUNC SnoopIClass(void)
 
         //samples += 4;
        samples += 1;
 
         //samples += 4;
        samples += 1;

-       //div2++;       

 
 

-       //if(div2 > 3) {
-               //div2 = 0;
-       //decbyte ^= ((smpl & 0x01) << (3 - div));
-       //decbyte ^= (((smpl & 0x01) | ((smpl & 0x02) >> 1)) << (3 - div)); // better already...
-       //decbyte ^= (((smpl & 0x01) | ((smpl & 0x02) >> 1) | ((smpl & 0x04) >> 2)) << (3 - div)); // even better...

        if(smpl & 0xF) {
                decbyte ^= (1 << (3 - div));
        }
        if(smpl & 0xF) {
                decbyte ^= (1 << (3 - div));
        }

-       //decbyte ^= (MajorityNibble[(smpl & 0x0F)] << (3 - div));

        
        // FOR READER SIDE COMMUMICATION...
        
        // FOR READER SIDE COMMUMICATION...

-       //decbyte ^=  ((smpl & 0x10) << (3 - div));
+

        decbyter <<= 2;
        decbyter ^= (smpl & 0x30);
 
        decbyter <<= 2;
        decbyter ^= (smpl & 0x30);
 


@@ -804,21 +764,17 @@ void RAMFUNC SnoopIClass(void)
                if(OutOfNDecoding((smpl & 0xF0) >> 4)) {
                    rsamples = samples - Uart.samples;
                    LED_C_ON();
                if(OutOfNDecoding((smpl & 0xF0) >> 4)) {
                    rsamples = samples - Uart.samples;
                    LED_C_ON();

-                   //if(triggered) {
-                       trace[traceLen++] = ((rsamples >>  0) & 0xff);
-                       trace[traceLen++] = ((rsamples >>  8) & 0xff);
-                       trace[traceLen++] = ((rsamples >> 16) & 0xff);
-                       trace[traceLen++] = ((rsamples >> 24) & 0xff);
-                       trace[traceLen++] = ((Uart.parityBits >>  0) & 0xff);
-                       trace[traceLen++] = ((Uart.parityBits >>  8) & 0xff);
-                       trace[traceLen++] = ((Uart.parityBits >> 16) & 0xff);
-                       trace[traceLen++] = ((Uart.parityBits >> 24) & 0xff);
-                       trace[traceLen++] = Uart.byteCnt;
-                       memcpy(trace+traceLen, receivedCmd, Uart.byteCnt);
-                       traceLen += Uart.byteCnt;
-                       if(traceLen > TRACE_LENGTH) break;
-                   //}
-                   /* And ready to receive another command. */
+
+                       //if(!LogTrace(Uart.output,Uart.byteCnt, rsamples, Uart.parityBits,TRUE)) break;
+                       //if(!LogTrace(NULL, 0, Uart.endTime*16 - DELAY_READER_AIR2ARM_AS_SNIFFER, 0, TRUE)) break;
+                       if(tracing)
+                       {
+                               LogTrace(Uart.output,Uart.byteCnt, (GetCountSspClk()-time_0) << 4, Uart.parityBits,TRUE);
+                               LogTrace(NULL, 0, (GetCountSspClk()-time_0) << 4, 0, TRUE);
+                       }
+
+
+                       /* And ready to receive another command. */

                    Uart.state = STATE_UNSYNCD;
                    /* And also reset the demod code, which might have been */
                    /* false-triggered by the commands from the reader. */
                    Uart.state = STATE_UNSYNCD;
                    /* And also reset the demod code, which might have been */
                    /* false-triggered by the commands from the reader. */


@@ -835,26 +791,16 @@ void RAMFUNC SnoopIClass(void)
                    rsamples = samples - Demod.samples;
                    LED_B_ON();
 
                    rsamples = samples - Demod.samples;
                    LED_B_ON();
 

-                   // timestamp, as a count of samples
-                   trace[traceLen++] = ((rsamples >>  0) & 0xff);
-                   trace[traceLen++] = ((rsamples >>  8) & 0xff);
-                   trace[traceLen++] = ((rsamples >> 16) & 0xff);
-                   trace[traceLen++] = 0x80 | ((rsamples >> 24) & 0xff);
-                   trace[traceLen++] = ((Demod.parityBits >>  0) & 0xff);
-                   trace[traceLen++] = ((Demod.parityBits >>  8) & 0xff);
-                   trace[traceLen++] = ((Demod.parityBits >> 16) & 0xff);
-                   trace[traceLen++] = ((Demod.parityBits >> 24) & 0xff);
-                   // length
-                   trace[traceLen++] = Demod.len;
-                   memcpy(trace+traceLen, receivedResponse, Demod.len);
-                   traceLen += Demod.len;
-                   if(traceLen > TRACE_LENGTH) break;
-
-                   //triggered = TRUE;
+                       if(tracing)
+                       {
+                               LogTrace(Demod.output,Demod.len, (GetCountSspClk()-time_0) << 4 , Demod.parityBits,FALSE);
+                               LogTrace(NULL, 0, (GetCountSspClk()-time_0) << 4, 0, FALSE);
+                       }
+

 
                    // And ready to receive another response.
                    memset(&Demod, 0, sizeof(Demod));
 
                    // And ready to receive another response.
                    memset(&Demod, 0, sizeof(Demod));

-                   Demod.output = receivedResponse;
+                       Demod.output = tagToReaderResponse;

                    Demod.state = DEMOD_UNSYNCD;
                    LED_C_OFF();
                }
                    Demod.state = DEMOD_UNSYNCD;
                    LED_C_OFF();
                }


@@ -885,20 +831,10 @@ done:
     LED_D_OFF();
 }
 
     LED_D_OFF();
 }
 

-
-void rotateCSN(uint8_t* originalCSN, uint8_t* rotatedCSN, int direction) {
-       int i;
-       int j = 0;
-       
-       if(direction == 0) {
-               for(i = 0; i < 8; i++) {
-                       rotatedCSN[i] = (originalCSN[i] >> 3) | (originalCSN[(i+1)%8] << 5);
-               }
-       } else {
-               for(i = 0; i < 8; i++) {
-                       if(i == 0) { j = 7; } else { j = i - 1; }
-                       originalCSN[i] = (rotatedCSN[i] << 3) | (rotatedCSN[j] >> 5);
-               }
+void rotateCSN(uint8_t* originalCSN, uint8_t* rotatedCSN) {
+       int i; 
+       for(i = 0; i < 8; i++) {
+               rotatedCSN[i] = (originalCSN[i] >> 3) | (originalCSN[(i+1)%8] << 5);

        }
 }
 
        }
 }
 


@@ -909,7 +845,7 @@ void rotateCSN(uint8_t* originalCSN, uint8_t* rotatedCSN, int direction) {
 //-----------------------------------------------------------------------------
 static int GetIClassCommandFromReader(uint8_t *received, int *len, int maxLen)
 {
 //-----------------------------------------------------------------------------
 static int GetIClassCommandFromReader(uint8_t *received, int *len, int maxLen)
 {

-    // Set FPGA mode to "simulated ISO 14443A tag", no modulation (listen
+    // Set FPGA mode to "simulated ISO 14443 tag", no modulation (listen

     // only, since we are receiving, not transmitting).
     // Signal field is off with the appropriate LED
     LED_D_OFF();
     // only, since we are receiving, not transmitting).
     // Signal field is off with the appropriate LED
     LED_D_OFF();


@@ -948,6 +884,8 @@ static int GetIClassCommandFromReader(uint8_t *received, int *len, int maxLen)
 //-----------------------------------------------------------------------------
 static void CodeIClassTagAnswer(const uint8_t *cmd, int len)
 {
 //-----------------------------------------------------------------------------
 static void CodeIClassTagAnswer(const uint8_t *cmd, int len)
 {

+       //So far a dummy implementation, not used
+       //int lastProxToAirDuration =0;

        int i;
 
        ToSendReset();
        int i;
 
        ToSendReset();


@@ -956,7 +894,7 @@ static void CodeIClassTagAnswer(const uint8_t *cmd, int len)
        ToSend[++ToSendMax] = 0x00;
        ToSend[++ToSendMax] = 0x00;
        ToSend[++ToSendMax] = 0x00;
        ToSend[++ToSendMax] = 0x00;
        ToSend[++ToSendMax] = 0x00;
        ToSend[++ToSendMax] = 0x00;

-       ToSend[++ToSendMax] = 0xff;
+       ToSend[++ToSendMax] = 0xff;//Proxtoair duration starts here

        ToSend[++ToSendMax] = 0xff;
        ToSend[++ToSendMax] = 0xff;
        ToSend[++ToSendMax] = 0x00;
        ToSend[++ToSendMax] = 0xff;
        ToSend[++ToSendMax] = 0xff;
        ToSend[++ToSendMax] = 0x00;


@@ -984,11 +922,13 @@ static void CodeIClassTagAnswer(const uint8_t *cmd, int len)
        ToSend[++ToSendMax] = 0x00;
        ToSend[++ToSendMax] = 0xff;
        ToSend[++ToSendMax] = 0xff;
        ToSend[++ToSendMax] = 0x00;
        ToSend[++ToSendMax] = 0xff;
        ToSend[++ToSendMax] = 0xff;

-       ToSend[++ToSendMax] = 0xff;
+       ToSend[++ToSendMax] = 0xff;     

        ToSend[++ToSendMax] = 0x00;
        ToSend[++ToSendMax] = 0x00;
        ToSend[++ToSendMax] = 0x00;
 
        ToSend[++ToSendMax] = 0x00;
        ToSend[++ToSendMax] = 0x00;
        ToSend[++ToSendMax] = 0x00;
 

+       //lastProxToAirDuration  = 8*ToSendMax - 3*8 - 3*8;//Not counting zeroes in the beginning or end
+

        // Convert from last byte pos to length
        ToSendMax++;
 }
        // Convert from last byte pos to length
        ToSendMax++;
 }


@@ -996,8 +936,10 @@ static void CodeIClassTagAnswer(const uint8_t *cmd, int len)
 // Only SOF 
 static void CodeIClassTagSOF()
 {
 // Only SOF 
 static void CodeIClassTagSOF()
 {

-       ToSendReset();
+       //So far a dummy implementation, not used
+       //int lastProxToAirDuration =0;

 
 

+       ToSendReset();

        // Send SOF
        ToSend[++ToSendMax] = 0x00;
        ToSend[++ToSendMax] = 0x00;
        // Send SOF
        ToSend[++ToSendMax] = 0x00;
        ToSend[++ToSendMax] = 0x00;


@@ -1007,63 +949,100 @@ static void CodeIClassTagSOF()
        ToSend[++ToSendMax] = 0xff;
        ToSend[++ToSendMax] = 0x00;
        ToSend[++ToSendMax] = 0xff;
        ToSend[++ToSendMax] = 0xff;
        ToSend[++ToSendMax] = 0x00;
        ToSend[++ToSendMax] = 0xff;

+
+//     lastProxToAirDuration  = 8*ToSendMax - 3*8;//Not counting zeroes in the beginning
+

        
        // Convert from last byte pos to length
        ToSendMax++;
 }
        
        // Convert from last byte pos to length
        ToSendMax++;
 }

-
-//-----------------------------------------------------------------------------
-// Simulate iClass Card
-// Only CSN (Card Serial Number)
-// 
-//-----------------------------------------------------------------------------
-void SimulateIClass(uint8_t arg0, uint8_t *datain)
+int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf);
+/**
+ * @brief SimulateIClass simulates an iClass card.
+ * @param arg0 type of simulation
+ *                     - 0 uses the first 8 bytes in usb data as CSN
+ *                     - 2 "dismantling iclass"-attack. This mode iterates through all CSN's specified
+ *                     in the usb data. This mode collects MAC from the reader, in order to do an offline
+ *                     attack on the keys. For more info, see "dismantling iclass" and proxclone.com.
+ *                     - Other : Uses the default CSN (031fec8af7ff12e0)
+ * @param arg1 - number of CSN's contained in datain (applicable for mode 2 only)
+ * @param arg2
+ * @param datain
+ */
+void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain)

 {
 {

-       // DEFINED ABOVE
-       // #define RECV_CMD_OFFSET   3032
-       // #define RECV_RES_OFFSET   3096
-       // #define DMA_BUFFER_OFFSET 3160
-       // #define DMA_BUFFER_SIZE   4096
-       // #define TRACE_LENGTH      3000
-       uint8_t simType = arg0;
-       int SMALL_BUFFER_OFFSET = 2000;
-       bool fullbuffer = FALSE;
-       uint32_t parityBits = 0;
-       
+       uint32_t simType = arg0;
+       uint32_t numberOfCSNS = arg1;
+       FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+
+       // Enable and clear the trace

        iso14a_set_tracing(TRUE);
        iso14a_set_tracing(TRUE);

-       iso14a_clear_tracelen();
-       iso14a_set_trigger(FALSE);
+       iso14a_clear_trace();
+
+       uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 };
+       if(simType == 0) {
+               // Use the CSN from commandline
+               memcpy(csn_crc, datain, 8);
+               doIClassSimulation(csn_crc,0,NULL);
+       }else if(simType == 1)
+       {
+               doIClassSimulation(csn_crc,0,NULL);
+       }
+       else if(simType == 2)
+       {
+
+               uint8_t mac_responses[64] = { 0 };
+               Dbprintf("Going into attack mode");
+               // In this mode, a number of csns are within datain. We'll simulate each one, one at a time
+               // in order to collect MAC's from the reader. This can later be used in an offlne-attack
+               // in order to obtain the keys, as in the "dismantling iclass"-paper.
+               int i = 0;
+               for( ; i < numberOfCSNS && i*8+8 < USB_CMD_DATA_SIZE; i++)
+               {
+                       // The usb data is 512 bytes, fitting 65 8-byte CSNs in there.
+
+                       memcpy(csn_crc, datain+(i*8), 8);
+                       if(doIClassSimulation(csn_crc,1,mac_responses))
+                       {
+                               return; // Button pressed
+                       }
+               }
+               cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8);
+
+       }
+       else{
+               // We may want a mode here where we hardcode the csns to use (from proxclone).
+               // That will speed things up a little, but not required just yet.
+               Dbprintf("The mode is not implemented, reserved for future use");
+       }
+       Dbprintf("Done...");
+
+}
+/**
+ * @brief Does the actual simulation
+ * @param csn - csn to use
+ * @param breakAfterMacReceived if true, returns after reader MAC has been received.
+ */
+int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf)
+{

 
 

-       // PREPARE PROTOCOL MESSAGES FIRST
-       
-       // Pointers to tag answers that should be stored in the buffer
-       uint8_t *response;
-       int responselength;

 
        // CSN followed by two CRC bytes
 
        // CSN followed by two CRC bytes

-       uint8_t response1[] = { 0x0f }; // Tag SOF

        uint8_t response2[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
        uint8_t response2[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };

-       uint8_t response3[] = { 0x00, 0x0B, 0x0F, 0xFF, 0xF7, 0xFF, 0x12, 0xE0, 0x00, 0x00 };
-       int response1length = 1;
-       int response2length = 10;
-       int response3length = 10;
-
+       uint8_t response3[] = { 0,0,0,0,0,0,0,0,0,0};
+       memcpy(response3,csn,sizeof(response3));
+       Dbprintf("Simulating CSN %02x%02x%02x%02x%02x%02x%02x%02x",csn[0],csn[1],csn[2],csn[3],csn[4],csn[5],csn[6],csn[7]);

        // e-Purse
        uint8_t response4[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
        // e-Purse
        uint8_t response4[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };

-       int response4length = 8;
-
-       if(simType == 0) {
-               // Use the CSN from commandline
-               memcpy(response3, datain, 8);
-       }

 
        // Construct anticollision-CSN
 
        // Construct anticollision-CSN

-       rotateCSN(response3,response2,0);
+       rotateCSN(response3,response2);

 
        // Compute CRC on both CSNs
        ComputeCrc14443(CRC_ICLASS, response2, 8, &response2[8], &response2[9]);
        ComputeCrc14443(CRC_ICLASS, response3, 8, &response3[8], &response3[9]);
 
 
        // Compute CRC on both CSNs
        ComputeCrc14443(CRC_ICLASS, response2, 8, &response2[8], &response2[9]);
        ComputeCrc14443(CRC_ICLASS, response3, 8, &response3[8], &response3[9]);
 

+       int exitLoop = 0;

        // Reader 0a
        // Tag    0f
        // Reader 0c
        // Reader 0a
        // Tag    0f
        // Reader 0c


@@ -1071,37 +1050,36 @@ void SimulateIClass(uint8_t arg0, uint8_t *datain)
        // Reader 81 anticoll. CSN
        // Tag    CSN
 
        // Reader 81 anticoll. CSN
        // Tag    CSN
 

-        uint8_t *resp;
-        int respLen;
+       uint8_t *resp;
+       int respLen;
+       uint8_t* respdata = NULL;
+       int respsize = 0;
+       uint8_t sof = 0x0f;

 
        // Respond SOF -- takes 8 bytes
 
        // Respond SOF -- takes 8 bytes

-       uint8_t *resp1 = (((uint8_t *)BigBuf));
+       uint8_t *resp1 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET);

        int resp1Len;
 
        // Anticollision CSN (rotated CSN)
        // 176: Takes 16 bytes for SOF/EOF and 10 * 16 = 160 bytes (2 bytes/bit)
        int resp1Len;
 
        // Anticollision CSN (rotated CSN)
        // 176: Takes 16 bytes for SOF/EOF and 10 * 16 = 160 bytes (2 bytes/bit)

-       uint8_t *resp2 = (((uint8_t *)BigBuf) + 10 + SMALL_BUFFER_OFFSET);
+       uint8_t *resp2 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 10);

        int resp2Len;
 
        // CSN
        // 176: Takes 16 bytes for SOF/EOF and 10 * 16 = 160 bytes (2 bytes/bit)
        int resp2Len;
 
        // CSN
        // 176: Takes 16 bytes for SOF/EOF and 10 * 16 = 160 bytes (2 bytes/bit)

-       uint8_t *resp3 = (((uint8_t *)BigBuf) + 190 + SMALL_BUFFER_OFFSET);
-       //int resp3Len; // NOT USED
+       uint8_t *resp3 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 190);
+       int resp3Len;

 
        // e-Purse
        // 144: Takes 16 bytes for SOF/EOF and 8 * 16 = 128 bytes (2 bytes/bit)
 
        // e-Purse
        // 144: Takes 16 bytes for SOF/EOF and 8 * 16 = 128 bytes (2 bytes/bit)

-       uint8_t *resp4 = (((uint8_t *)BigBuf) + 270 + SMALL_BUFFER_OFFSET);
+       uint8_t *resp4 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 370);

        int resp4Len;
 
        // + 1720..
        int resp4Len;
 
        // + 1720..

-       //uint8_t *receivedCmd = (uint8_t *)BigBuf;
-        uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
-       memset(receivedCmd, 0x44, 64);
+       uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
+       memset(receivedCmd, 0x44, RECV_CMD_SIZE);

        int len;
 
        int len;
 

-       // Reset trace buffer
-        memset(trace, 0x44, RECV_CMD_OFFSET);
-

        // Prepare card messages
        ToSendMax = 0;
 
        // Prepare card messages
        ToSendMax = 0;
 


@@ -1115,74 +1093,105 @@ void SimulateIClass(uint8_t arg0, uint8_t *datain)
 
        // CSN
        CodeIClassTagAnswer(response3, sizeof(response3));
 
        // CSN
        CodeIClassTagAnswer(response3, sizeof(response3));

-       memcpy(resp3, ToSend, ToSendMax); //resp3Len = ToSendMax; // NOT USED
+       memcpy(resp3, ToSend, ToSendMax); resp3Len = ToSendMax;

 
        // e-Purse
        CodeIClassTagAnswer(response4, sizeof(response4));
        memcpy(resp4, ToSend, ToSendMax); resp4Len = ToSendMax;
 
 
        // e-Purse
        CodeIClassTagAnswer(response4, sizeof(response4));
        memcpy(resp4, ToSend, ToSendMax); resp4Len = ToSendMax;
 

+
+       // Start from off (no field generated)
+       //FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       //SpinDelay(200);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN);
+       SpinDelay(100);
+       StartCountSspClk();

        // We need to listen to the high-frequency, peak-detected path.
        SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
        FpgaSetupSsc();
 
        // To control where we are in the protocol
        // We need to listen to the high-frequency, peak-detected path.
        SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
        FpgaSetupSsc();
 
        // To control where we are in the protocol

-       //int order = 0;
-       // int lastorder; // NOT USED

        int cmdsRecvd = 0;
        int cmdsRecvd = 0;

-       resp = resp1; respLen = 0;
-       response = response1; responselength = response1length;
+       uint32_t time_0 = GetCountSspClk();
+       uint32_t t2r_time =0;
+       uint32_t r2t_time =0;
+

        LED_A_ON();
        LED_A_ON();

-       for(;;) {
+       bool buttonPressed = false;
+
+       /** Hack  for testing
+       memcpy(reader_mac_buf,csn,8);
+       exitLoop = true;
+       end hack **/
+
+       while(!exitLoop) {
+

                LED_B_OFF();
                LED_B_OFF();

+               //Signal tracer
+               // Can be used to get a trigger for an oscilloscope..
+               LED_C_OFF();
+

                if(!GetIClassCommandFromReader(receivedCmd, &len, 100)) {
                if(!GetIClassCommandFromReader(receivedCmd, &len, 100)) {

-                       DbpString("button press");
+                       buttonPressed = true;

                        break;
                        break;

-                       }
+               }
+               r2t_time = GetCountSspClk();
+               //Signal tracer
+               LED_C_ON();

 
 

-               // Okay, look at the command now.
-               //lastorder = order; // NOT USED
-               if(receivedCmd[0] == 0x0a) {
+               // Okay, look at the command now.
+               if(receivedCmd[0] == 0x0a ) {

                        // Reader in anticollission phase
                        resp = resp1; respLen = resp1Len; //order = 1;
                        // Reader in anticollission phase
                        resp = resp1; respLen = resp1Len; //order = 1;

-                       response = response1; responselength = response1length;
-                       //resp = resp2; respLen = resp2Len; order = 2;
-                       //DbpString("Hello request from reader:");
+                       respdata = &sof;
+                       respsize = sizeof(sof);

                } else if(receivedCmd[0] == 0x0c) {
                        // Reader asks for anticollission CSN
                        resp = resp2; respLen = resp2Len; //order = 2;
                } else if(receivedCmd[0] == 0x0c) {
                        // Reader asks for anticollission CSN
                        resp = resp2; respLen = resp2Len; //order = 2;

-                       response = response2; responselength = response2length;
+                       respdata = response2;
+                       respsize = sizeof(response2);

                        //DbpString("Reader requests anticollission CSN:");
                } else if(receivedCmd[0] == 0x81) {
                        // Reader selects anticollission CSN.
                        // Tag sends the corresponding real CSN
                        //DbpString("Reader requests anticollission CSN:");
                } else if(receivedCmd[0] == 0x81) {
                        // Reader selects anticollission CSN.
                        // Tag sends the corresponding real CSN

-                       resp = resp3; respLen = resp2Len; //order = 3;
-                       response = response3; responselength = response3length;
+                       resp = resp3; respLen = resp3Len; //order = 3;
+                       respdata = response3;
+                       respsize = sizeof(response3);

                        //DbpString("Reader selects anticollission CSN:");
                } else if(receivedCmd[0] == 0x88) {
                        // Read e-purse (88 02)
                        resp = resp4; respLen = resp4Len; //order = 4;
                        //DbpString("Reader selects anticollission CSN:");
                } else if(receivedCmd[0] == 0x88) {
                        // Read e-purse (88 02)
                        resp = resp4; respLen = resp4Len; //order = 4;

-                       response = response4; responselength = response4length;
+                       respdata = response4;
+                       respsize = sizeof(response4);

                        LED_B_ON();
                } else if(receivedCmd[0] == 0x05) {
                        // Reader random and reader MAC!!!
                        LED_B_ON();
                } else if(receivedCmd[0] == 0x05) {
                        // Reader random and reader MAC!!!

-                       // Lets store this ;-)
-                       Dbprintf("            CSN: %02x %02x %02x %02x %02x %02x %02x %02x",
-                       response3[0], response3[1], response3[2],
-                       response3[3], response3[4], response3[5],
-                       response3[6], response3[7]);
-                       Dbprintf("READER AUTH (len=%02d): %02x %02x %02x %02x %02x %02x %02x %02x %02x",
-                       len,
-                       receivedCmd[0], receivedCmd[1], receivedCmd[2],
-                       receivedCmd[3], receivedCmd[4], receivedCmd[5],
-                       receivedCmd[6], receivedCmd[7], receivedCmd[8]);
-

                        // Do not respond
                        // We do not know what to answer, so lets keep quit
                        resp = resp1; respLen = 0; //order = 5;
                        // Do not respond
                        // We do not know what to answer, so lets keep quit
                        resp = resp1; respLen = 0; //order = 5;

+                       respdata = NULL;
+                       respsize = 0;
+                       if (breakAfterMacReceived){
+                               // TODO, actually return this to the caller instead of just
+                               // dbprintf:ing ...
+                               Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x",csn[0],csn[1],csn[2],csn[3],csn[4],csn[5],csn[6],csn[7]);
+                               Dbprintf("RDR:  (len=%02d): %02x %02x %02x %02x %02x %02x %02x %02x %02x",len,
+                                                receivedCmd[0], receivedCmd[1], receivedCmd[2],
+                                               receivedCmd[3], receivedCmd[4], receivedCmd[5],
+                                               receivedCmd[6], receivedCmd[7], receivedCmd[8]);
+                               if (reader_mac_buf != NULL)
+                               {
+                                       memcpy(reader_mac_buf,receivedCmd+1,8);
+                               }
+                               exitLoop = true;
+                       }

                } else if(receivedCmd[0] == 0x00 && len == 1) {
                        // Reader ends the session
                        resp = resp1; respLen = 0; //order = 0;
                } else if(receivedCmd[0] == 0x00 && len == 1) {
                        // Reader ends the session
                        resp = resp1; respLen = 0; //order = 0;

-               } else {
+                       respdata = NULL;
+                       respsize = 0;
+               } else {
+                       //#db# Unknown command received from reader (len=5): 26 1 0 f6 a 44 44 44 44

                        // Never seen this command before
                        Dbprintf("Unknown command received from reader (len=%d): %x %x %x %x %x %x %x %x %x",
                        len,
                        // Never seen this command before
                        Dbprintf("Unknown command received from reader (len=%d): %x %x %x %x %x %x %x %x %x",
                        len,


@@ -1191,76 +1200,82 @@ void SimulateIClass(uint8_t arg0, uint8_t *datain)
                        receivedCmd[6], receivedCmd[7], receivedCmd[8]);
                        // Do not respond
                        resp = resp1; respLen = 0; //order = 0;
                        receivedCmd[6], receivedCmd[7], receivedCmd[8]);
                        // Do not respond
                        resp = resp1; respLen = 0; //order = 0;

-                       response = response1; responselength = response1length;
+                       respdata = NULL;
+                       respsize = 0;

                }
 
                }
 

-               if(cmdsRecvd > 999) {
-                       DbpString("1000 commands later...");
-                       break;
+               if(cmdsRecvd >  100) {
+                       //DbpString("100 commands later...");
+                       //break;

                }
                else {
                        cmdsRecvd++;
                }
 
                }
                else {
                        cmdsRecvd++;
                }
 

-               if(respLen <= 0) continue;
+               if(respLen > 0) {
+                       SendIClassAnswer(resp, respLen, 21);
+                       t2r_time = GetCountSspClk();
+               }
+
+               if (tracing) {
+                       LogTrace(receivedCmd,len, (r2t_time-time_0)<< 4, Uart.parityBits,TRUE);
+                       LogTrace(NULL,0, (r2t_time-time_0) << 4, 0,TRUE);
+
+                       if (respdata != NULL) {
+                               LogTrace(respdata,respsize, (t2r_time-time_0) << 4,SwapBits(GetParity(respdata,respsize),respsize),FALSE);
+                               LogTrace(NULL,0, (t2r_time-time_0) << 4,0,FALSE);

 
 

-               SendIClassAnswer(resp, respLen, 21);

 
 

-               // Store commands and responses in buffer
-               // as long as there is room for it.
-               if(traceLen < (SMALL_BUFFER_OFFSET - 32)) {
-                       if(tracing) {
-                               LogTrace(receivedCmd,len,0,GetParity(receivedCmd,len),TRUE);
-                               parityBits = SwapBits(GetParity(response,responselength),responselength);
-                               LogTrace(response,responselength,0,parityBits,FALSE);

                        }
                        }

-               } else if(!fullbuffer) {
-                       DbpString("Trace buffer is full now...");
-                       fullbuffer = TRUE;
-               }
+                       if(!tracing) {
+                               DbpString("Trace full");
+                               //break;
+                       }

 
 

-               memset(receivedCmd, 0x44, 32);
-    }
+               }
+               memset(receivedCmd, 0x44, RECV_CMD_SIZE);
+       }

 
 

-       //Dbprintf("Commands received: %d", cmdsRecvd);
+       //Dbprintf("%x", cmdsRecvd);

        LED_A_OFF();
        LED_B_OFF();
        LED_A_OFF();
        LED_B_OFF();

+       if(buttonPressed)
+       {
+               DbpString("Button pressed");
+       }
+       return buttonPressed;

 }
 
 static int SendIClassAnswer(uint8_t *resp, int respLen, int delay)
 {
 }
 
 static int SendIClassAnswer(uint8_t *resp, int respLen, int delay)
 {

-       int i = 0, u = 0, d = 0;
+       int i = 0, d=0;//, u = 0, d = 0;

        uint8_t b = 0;
        uint8_t b = 0;

-       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_MOD);
+
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K);
+

        AT91C_BASE_SSC->SSC_THR = 0x00;
        FpgaSetupSsc();
        AT91C_BASE_SSC->SSC_THR = 0x00;
        FpgaSetupSsc();

-       
-       // send cycle
-       for(;;) {
-               if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
-                       volatile uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
-                       (void)b;
+       while(!BUTTON_PRESS()) {
+               if((AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)){
+                       b = AT91C_BASE_SSC->SSC_RHR; (void) b;

                }
                }

-               if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+               if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)){
+                       b = 0x00;

                        if(d < delay) {
                        if(d < delay) {

-                               b = 0x00;

                                d++;
                        }
                                d++;
                        }

-                       else if(i >= respLen) {
-                               b = 0x00;
-                               u++;
-                       } else {
-                               b = resp[i];
-                               u++;
-                               if(u > 1) { i++; u = 0; }
+                       else {
+                               if( i < respLen){
+                                       b = resp[i];
+                                       //Hack
+                                       //b = 0xAC;
+                               }
+                               i++;

                        }
                        AT91C_BASE_SSC->SSC_THR = b;
                        }
                        AT91C_BASE_SSC->SSC_THR = b;

-
-                       if(u > 4) break;
-               }
-               if(BUTTON_PRESS()) {
-                       break;

                }
                }

+
+               if (i > respLen +4) break;

        }
 
        return 0;
        }
 
        return 0;


@@ -1274,7 +1289,6 @@ static int SendIClassAnswer(uint8_t *resp, int respLen, int delay)
 static void TransmitIClassCommand(const uint8_t *cmd, int len, int *samples, int *wait)
 {
   int c;
 static void TransmitIClassCommand(const uint8_t *cmd, int len, int *samples, int *wait)
 {
   int c;

-

   FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
   AT91C_BASE_SSC->SSC_THR = 0x00;
   FpgaSetupSsc();
   FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
   AT91C_BASE_SSC->SSC_THR = 0x00;
   FpgaSetupSsc();


@@ -1350,12 +1364,12 @@ void CodeIClassCommand(const uint8_t * cmd, int len)
     b = cmd[i];
     for(j = 0; j < 4; j++) {
       for(k = 0; k < 4; k++) {
     b = cmd[i];
     for(j = 0; j < 4; j++) {
       for(k = 0; k < 4; k++) {

-       if(k == (b & 3)) {
-           ToSend[++ToSendMax] = 0x0f;
-       }
-       else {
-           ToSend[++ToSendMax] = 0x00;
-       }
+                       if(k == (b & 3)) {
+                               ToSend[++ToSendMax] = 0x0f;
+                       }
+                       else {
+                               ToSend[++ToSendMax] = 0x00;
+                       }

       }
       b >>= 2;
     }
       }
       b >>= 2;
     }


@@ -1387,7 +1401,7 @@ void ReaderTransmitIClass(uint8_t* frame, int len)
        LED_A_ON();
 
   // Store reader command in buffer
        LED_A_ON();
 
   // Store reader command in buffer

-  if (tracing) LogTrace(frame,len,0,par,TRUE);
+  if (tracing) LogTrace(frame,len,rsamples,par,TRUE);

 }
 
 //-----------------------------------------------------------------------------
 }
 
 //-----------------------------------------------------------------------------


@@ -1445,26 +1459,24 @@ int ReaderReceiveIClass(uint8_t* receivedAnswer)
 {
   int samples = 0;
   if (!GetIClassAnswer(receivedAnswer,160,&samples,0)) return FALSE;
 {
   int samples = 0;
   if (!GetIClassAnswer(receivedAnswer,160,&samples,0)) return FALSE;

-  if (tracing) LogTrace(receivedAnswer,Demod.len,samples,Demod.parityBits,FALSE);
+  rsamples += samples;
+  if (tracing) LogTrace(receivedAnswer,Demod.len,rsamples,Demod.parityBits,FALSE);

   if(samples == 0) return FALSE;
   return Demod.len;
 }
 
 // Reader iClass Anticollission
 void ReaderIClass(uint8_t arg0) {
   if(samples == 0) return FALSE;
   return Demod.len;
 }
 
 // Reader iClass Anticollission
 void ReaderIClass(uint8_t arg0) {

-       int i = 0;
-       int length = 0;
-       bool csn_failure = FALSE;
-

        uint8_t act_all[]     = { 0x0a };
        uint8_t identify[]    = { 0x0c };
        uint8_t select[]      = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
        uint8_t act_all[]     = { 0x0a };
        uint8_t identify[]    = { 0x0c };
        uint8_t select[]      = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };

-       uint8_t check_csn[]   = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };

 
        uint8_t* resp = (((uint8_t *)BigBuf) + 3560);   // was 3560 - tied to other size changes
 
 
        uint8_t* resp = (((uint8_t *)BigBuf) + 3560);   // was 3560 - tied to other size changes
 

+    FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+

        // Reset trace buffer
        // Reset trace buffer

-       memset(trace, 0x44, RECV_CMD_OFFSET);
+       memset(trace, 0x44, RECV_CMD_OFFSET);

        traceLen = 0;
 
        // Setup SSC
        traceLen = 0;
 
        // Setup SSC


@@ -1485,47 +1497,37 @@ void ReaderIClass(uint8_t arg0) {
        LED_A_ON();
 
        for(;;) {
        LED_A_ON();
 
        for(;;) {

-               if(traceLen > TRACE_LENGTH || BUTTON_PRESS()) break;
+       
+               if(traceLen > TRACE_SIZE) {
+                       DbpString("Trace full");
+                       break;
+               }
+               
+               if (BUTTON_PRESS()) break;

 
                // Send act_all
                ReaderTransmitIClass(act_all, 1);
                // Card present?
                if(ReaderReceiveIClass(resp)) {
                        ReaderTransmitIClass(identify, 1);
 
                // Send act_all
                ReaderTransmitIClass(act_all, 1);
                // Card present?
                if(ReaderReceiveIClass(resp)) {
                        ReaderTransmitIClass(identify, 1);

-                       if((length = ReaderReceiveIClass(resp))) {
-                               if(length == 10) {
-                                       // Select card          
-                                       memcpy(&select[1],resp,8);
-                                       ReaderTransmitIClass(select, sizeof(select));
-       
-                                       if((length = ReaderReceiveIClass(resp))) {
-                                               if(length == 10) {
-                                                       rotateCSN(check_csn,&select[1],1);
-                                                       csn_failure = FALSE;
-                                                       for(i = 0; i < 8; i++) {
-                                                               if(check_csn[i] != resp[i]) {
-                                                                       csn_failure = TRUE;
-                                                                       break;
-                                                               }
-                                                       }
-                                                       
-                                                       if(!csn_failure) {
-                       Dbprintf("     Selected CSN: %02x %02x %02x %02x %02x %02x %02x %02x",
-                       check_csn[0], check_csn[1], check_csn[2],
-                       check_csn[3], check_csn[4], check_csn[5],
-                       check_csn[6], check_csn[7]);
-                                                       }
-                                                       // Card selected, whats next... ;-)
-                                                       
-                                               }
-                                       }
+                       if(ReaderReceiveIClass(resp) == 10) {
+                               // Select card          
+                               memcpy(&select[1],resp,8);
+                               ReaderTransmitIClass(select, sizeof(select));
+
+                               if(ReaderReceiveIClass(resp) == 10) {
+                                       Dbprintf("     Selected CSN: %02x %02x %02x %02x %02x %02x %02x %02x",
+                                       resp[0], resp[1], resp[2],
+                                       resp[3], resp[4], resp[5],
+                                       resp[6], resp[7]);

                                }
                                }

+                               // Card selected, whats next... ;-)

                        }
                }
                WDT_HIT();
        }
        
        LED_A_OFF();
                        }
                }
                WDT_HIT();
        }
        
        LED_A_OFF();

-

 }
 
 }
 

+