Implemented new optimized version of MAC-calculation for iclass

[proxmark3-svn] / armsrc / iclass.c

diff --git a/armsrc/iclass.c b/armsrc/iclass.c
index e7dd95358bb1b2a0dc25961e820c3d1731a26376..ca6d9a7ec26b1b27cd88cfd2b6f796aa9da2d4fa 100644 (file)
--- a/armsrc/iclass.c
+++ b/armsrc/iclass.c
@@ -47,6 +47,8 @@
 // different initial value (CRC_ICLASS)
 #include "iso14443crc.h"
 #include "iso15693tools.h"
 // different initial value (CRC_ICLASS)
 #include "iso14443crc.h"
 #include "iso15693tools.h"

+#include "protocols.h"
+#include "optimized_cipher.h"

 
 static int timeout = 4096;
 
 
 static int timeout = 4096;
 


@@ -640,21 +642,24 @@ 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 *readerToTagCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
+       #define ICLASS_BUFFER_SIZE 32
+       uint8_t readerToTagCmd[ICLASS_BUFFER_SIZE];

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

-       uint8_t *tagToReaderResponse = (((uint8_t *)BigBuf) + RECV_RESP_OFFSET);
+       uint8_t tagToReaderResponse[ICLASS_BUFFER_SIZE];

        
     FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
  
        
     FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
  

-    // reset traceLen to 0
-    iso14a_set_tracing(TRUE);
-    iso14a_clear_trace();
+       // free all BigBuf memory
+       BigBuf_free();
+    // The DMA buffer, used to stream samples from the FPGA
+    uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE);
+ 
+       set_tracing(TRUE);
+       clear_trace();

     iso14a_set_trigger(FALSE);
 
     iso14a_set_trigger(FALSE);
 

-    // The DMA buffer, used to stream samples from the FPGA
-    int8_t *dmaBuf = ((int8_t *)BigBuf) + DMA_BUFFER_OFFSET;
-    int lastRxCounter;
-    int8_t *upTo;
+       int lastRxCounter;
+    uint8_t *upTo;

     int smpl;
     int maxBehindBy = 0;
 
     int smpl;
     int maxBehindBy = 0;
 


@@ -703,7 +708,7 @@ void RAMFUNC SnoopIClass(void)
                                 (DMA_BUFFER_SIZE-1);
         if(behindBy > maxBehindBy) {
             maxBehindBy = behindBy;
                                 (DMA_BUFFER_SIZE-1);
         if(behindBy > maxBehindBy) {
             maxBehindBy = behindBy;

-            if(behindBy > 400) {
+            if(behindBy > (9 * DMA_BUFFER_SIZE / 10)) {

                 Dbprintf("blew circular buffer! behindBy=0x%x", behindBy);
                 goto done;
             }
                 Dbprintf("blew circular buffer! behindBy=0x%x", behindBy);
                 goto done;
             }


@@ -801,12 +806,12 @@ void RAMFUNC SnoopIClass(void)
     DbpString("COMMAND FINISHED");
 
     Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt);
     DbpString("COMMAND FINISHED");
 
     Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt);

-    Dbprintf("%x %x %x", Uart.byteCntMax, traceLen, (int)Uart.output[0]);
+       Dbprintf("%x %x %x", Uart.byteCntMax, BigBuf_get_traceLen(), (int)Uart.output[0]);

 
 done:
     AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;
     Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt);
 
 done:
     AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;
     Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt);

-    Dbprintf("%x %x %x", Uart.byteCntMax, traceLen, (int)Uart.output[0]);
+       Dbprintf("%x %x %x", Uart.byteCntMax, BigBuf_get_traceLen(), (int)Uart.output[0]);

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


@@ -962,8 +967,11 @@ static void CodeIClassTagSOF()
        // Convert from last byte pos to length
        ToSendMax++;
 }
        // Convert from last byte pos to length
        ToSendMax++;
 }

+#define MODE_SIM_CSN        0
+#define MODE_EXIT_AFTER_MAC 1
+#define MODE_FULLSIM        2

 
 

-int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf);
+int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf);

 /**
  * @brief SimulateIClass simulates an iClass card.
  * @param arg0 type of simulation
 /**
  * @brief SimulateIClass simulates an iClass card.
  * @param arg0 type of simulation


@@ -983,17 +991,22 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
        FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
 
        // Enable and clear the trace
        FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
 
        // Enable and clear the trace

-       iso14a_set_tracing(TRUE);
-       iso14a_clear_trace();
+       set_tracing(TRUE);
+       clear_trace();
+       //Use the emulator memory for SIM
+       uint8_t *emulator = BigBuf_get_EM_addr();

 
 

-       uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 };

        if(simType == 0) {
                // Use the CSN from commandline
        if(simType == 0) {
                // Use the CSN from commandline

-               memcpy(csn_crc, datain, 8);
-               doIClassSimulation(csn_crc,0,NULL);
+               memcpy(emulator, datain, 8);
+               doIClassSimulation(MODE_SIM_CSN,NULL);

        }else if(simType == 1)
        {
        }else if(simType == 1)
        {

-               doIClassSimulation(csn_crc,0,NULL);
+               //Default CSN
+               uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 };
+               // Use the CSN from commandline
+               memcpy(emulator, csn_crc, 8);
+               doIClassSimulation(MODE_SIM_CSN,NULL);

        }
        else if(simType == 2)
        {
        }
        else if(simType == 2)
        {


@@ -1008,8 +1021,8 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
                {
                        // The usb data is 512 bytes, fitting 65 8-byte CSNs in there.
 
                {
                        // 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+i*8))
+                       memcpy(emulator, datain+(i*8), 8);
+                       if(doIClassSimulation(MODE_EXIT_AFTER_MAC,mac_responses+i*8))

                        {
                                cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8);
                                return; // Button pressed
                        {
                                cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8);
                                return; // Button pressed


@@ -1017,6 +1030,9 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
                }
                cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8);
 
                }
                cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8);
 

+       }else if(simType == 3){
+               //This is 'full sim' mode, where we use the emulator storage for data.
+               doIClassSimulation(MODE_FULLSIM, NULL);

        }
        else{
                // We may want a mode here where we hardcode the csns to use (from proxclone).
        }
        else{
                // We may want a mode here where we hardcode the csns to use (from proxclone).


@@ -1026,29 +1042,40 @@ void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain
        Dbprintf("Done...");
 
 }
        Dbprintf("Done...");
 
 }

+

 /**
  * @brief Does the actual simulation
  * @param csn - csn to use
  * @param breakAfterMacReceived if true, returns after reader MAC has been received.
  */
 /**
  * @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)
+int doIClassSimulation( int simulationMode, uint8_t *reader_mac_buf)

 {
 {

+       // free eventually allocated BigBuf memory
+       BigBuf_free_keep_EM();

 
 

+       uint8_t *csn = BigBuf_get_EM_addr();
+       uint8_t *emulator = csn;
+       uint8_t sof_data[] = { 0x0F} ;

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

-       uint8_t response1[] = { 0x0F} ;
-       uint8_t response2[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
-       uint8_t response3[] = { 0,0,0,0,0,0,0,0,0,0};
-       memcpy(response3,csn,sizeof(response3));
+       uint8_t anticoll_data[10] = { 0 };
+       uint8_t csn_data[10] = { 0 };
+       memcpy(csn_data,csn,sizeof(csn_data));

        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]);
        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 };

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

-       rotateCSN(response3,response2);
+       rotateCSN(csn_data,anticoll_data);

 
        // Compute CRC on both CSNs
 
        // Compute CRC on both CSNs

-       ComputeCrc14443(CRC_ICLASS, response2, 8, &response2[8], &response2[9]);
-       ComputeCrc14443(CRC_ICLASS, response3, 8, &response3[8], &response3[9]);
+       ComputeCrc14443(CRC_ICLASS, anticoll_data, 8, &anticoll_data[8], &anticoll_data[9]);
+       ComputeCrc14443(CRC_ICLASS, csn_data, 8, &csn_data[8], &csn_data[9]);
+
+       // e-Purse
+       uint8_t card_challenge_data[8] = { 0x00 };
+       if(simulationMode == MODE_FULLSIM)
+       {
+               //Card challenge, a.k.a e-purse is on block 2
+               memcpy(card_challenge_data,emulator + (8 * 2) , 8);
+       }

 
        int exitLoop = 0;
        // Reader 0a
 
        int exitLoop = 0;
        // Reader 0a


@@ -1059,32 +1086,31 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
        // Tag    CSN
 
        uint8_t *modulated_response;
        // Tag    CSN
 
        uint8_t *modulated_response;

-       int modulated_response_size;
+       int modulated_response_size = 0;

        uint8_t* trace_data = NULL;
        int trace_data_size = 0;
        uint8_t* trace_data = NULL;
        int trace_data_size = 0;

-       //uint8_t sof = 0x0f;
+

 
        // Respond SOF -- takes 1 bytes
 
        // Respond SOF -- takes 1 bytes

-       uint8_t *resp1 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET);
-       int resp1Len;
+       uint8_t *resp_sof = BigBuf_malloc(2);
+       int resp_sof_Len;

 
        // Anticollision CSN (rotated CSN)
        // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
 
        // Anticollision CSN (rotated CSN)
        // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)

-       uint8_t *resp2 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 2);
-       int resp2Len;
+       uint8_t *resp_anticoll = BigBuf_malloc(28);
+       int resp_anticoll_len;

 
        // CSN
        // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
 
        // CSN
        // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)

-       uint8_t *resp3 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 30);
-       int resp3Len;
+       uint8_t *resp_csn = BigBuf_malloc(30);
+       int resp_csn_len;

 
        // e-Purse
 
        // e-Purse

-       // 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/byte)
-       uint8_t *resp4 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 60);
-       int resp4Len;
+       // 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/bit)
+       uint8_t *resp_cc = BigBuf_malloc(20);
+       int resp_cc_len;

 
 

-       // + 1720..
-       uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
+       uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE);

        memset(receivedCmd, 0x44, MAX_FRAME_SIZE);
        int len;
 
        memset(receivedCmd, 0x44, MAX_FRAME_SIZE);
        int len;
 


@@ -1093,20 +1119,24 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
 
        // First card answer: SOF
        CodeIClassTagSOF();
 
        // First card answer: SOF
        CodeIClassTagSOF();

-       memcpy(resp1, ToSend, ToSendMax); resp1Len = ToSendMax;
+       memcpy(resp_sof, ToSend, ToSendMax); resp_sof_Len = ToSendMax;

 
        // Anticollision CSN
 
        // Anticollision CSN

-       CodeIClassTagAnswer(response2, sizeof(response2));
-       memcpy(resp2, ToSend, ToSendMax); resp2Len = ToSendMax;
+       CodeIClassTagAnswer(anticoll_data, sizeof(anticoll_data));
+       memcpy(resp_anticoll, ToSend, ToSendMax); resp_anticoll_len = ToSendMax;

 
        // CSN
 
        // CSN

-       CodeIClassTagAnswer(response3, sizeof(response3));
-       memcpy(resp3, ToSend, ToSendMax); resp3Len = ToSendMax;
+       CodeIClassTagAnswer(csn_data, sizeof(csn_data));
+       memcpy(resp_csn, ToSend, ToSendMax); resp_csn_len = ToSendMax;

 
        // e-Purse
 
        // e-Purse

-       CodeIClassTagAnswer(response4, sizeof(response4));
-       memcpy(resp4, ToSend, ToSendMax); resp4Len = ToSendMax;
+       CodeIClassTagAnswer(card_challenge_data, sizeof(card_challenge_data));
+       memcpy(resp_cc, ToSend, ToSendMax); resp_cc_len = ToSendMax;

 
 

+       //This is used for responding to READ-block commands or other data which is dynamically generated
+       uint8_t *data_response = BigBuf_malloc(8 * 2 + 2);
+       //This is used for responding to READ-block commands or other data which is dynamically generated
+       uint8_t *data_generic_trace = BigBuf_malloc(8 * 2 + 2);

 
        // Start from off (no field generated)
        //FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 
        // Start from off (no field generated)
        //FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);


@@ -1143,57 +1173,100 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
                LED_C_ON();
 
                // Okay, look at the command now.
                LED_C_ON();
 
                // Okay, look at the command now.

-               if(receivedCmd[0] == 0x0a ) {
+               if(receivedCmd[0] == ICLASS_CMD_ACTALL ) {

                        // Reader in anticollission phase
                        // Reader in anticollission phase

-                       modulated_response = resp1; modulated_response_size = resp1Len; //order = 1;
-                       trace_data = response1;
-                       trace_data_size = sizeof(response1);
-               } else if(receivedCmd[0] == 0x0c) {
+                       modulated_response = resp_sof; modulated_response_size = resp_sof_Len; //order = 1;
+                       trace_data = sof_data;
+                       trace_data_size = sizeof(sof_data);
+               } else if(receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 1) {

                        // Reader asks for anticollission CSN
                        // Reader asks for anticollission CSN

-                       modulated_response = resp2; modulated_response_size = resp2Len; //order = 2;
-                       trace_data = response2;
-                       trace_data_size = sizeof(response2);
+                       modulated_response = resp_anticoll; modulated_response_size = resp_anticoll_len; //order = 2;
+                       trace_data = anticoll_data;
+                       trace_data_size = sizeof(anticoll_data);

                        //DbpString("Reader requests anticollission CSN:");
                        //DbpString("Reader requests anticollission CSN:");

-               } else if(receivedCmd[0] == 0x81) {
+               } else if(receivedCmd[0] == ICLASS_CMD_SELECT) {

                        // Reader selects anticollission CSN.
                        // Tag sends the corresponding real CSN
                        // Reader selects anticollission CSN.
                        // Tag sends the corresponding real CSN

-                       modulated_response = resp3; modulated_response_size = resp3Len; //order = 3;
-                       trace_data = response3;
-                       trace_data_size = sizeof(response3);
+                       modulated_response = resp_csn; modulated_response_size = resp_csn_len; //order = 3;
+                       trace_data = csn_data;
+                       trace_data_size = sizeof(csn_data);

                        //DbpString("Reader selects anticollission CSN:");
                        //DbpString("Reader selects anticollission CSN:");

-               } else if(receivedCmd[0] == 0x88) {
+               } else if(receivedCmd[0] == ICLASS_CMD_READCHECK_KD) {

                        // Read e-purse (88 02)
                        // Read e-purse (88 02)

-                       modulated_response = resp4; modulated_response_size = resp4Len; //order = 4;
-                       trace_data = response4;
-                       trace_data_size = sizeof(response4);
+                       modulated_response = resp_cc; modulated_response_size = resp_cc_len; //order = 4;
+                       trace_data = card_challenge_data;
+                       trace_data_size = sizeof(card_challenge_data);

                        LED_B_ON();
                        LED_B_ON();

-               } else if(receivedCmd[0] == 0x05) {
+               } else if(receivedCmd[0] == ICLASS_CMD_CHECK) {

                        // Reader random and reader MAC!!!
                        // Reader random and reader MAC!!!

-                       // Do not respond
-            // We do not know what to answer, so lets keep quiet
-                       modulated_response = resp1; modulated_response_size = 0; //order = 5;
-                       trace_data = NULL;
-                       trace_data_size = 0;
-                       if (breakAfterMacReceived){
-                               // 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);
+                       if(simulationMode == MODE_FULLSIM)
+                       {       //This is what we must do..
+                               //Reader just sent us NR and MAC(k,cc * nr)
+                               //The diversified key should be stored on block 3
+                               //However, from a typical dump, the key will not be there
+                               uint8_t diversified_key[8] = { 0 };
+
+                               //Get the diversified key from emulator memory
+                               memcpy(diversified_key, emulator+(8*3),8);
+                               uint8_t ccnr[12] = { 0 };
+                               //Put our cc there (block 2)
+                               memcpy(ccnr, emulator + (8 * 2), 8);
+                               //Put nr there
+                               memcpy(ccnr+8, receivedCmd+1,4);
+                               //Now, calc MAC
+                               opt_doMAC(ccnr,diversified_key, data_generic_trace);
+                               trace_data = data_generic_trace;
+                               trace_data_size = 4;
+                               CodeIClassTagAnswer(trace_data , trace_data_size);
+                               memcpy(data_response, ToSend, ToSendMax);
+                               modulated_response = data_response;
+                               modulated_response_size = ToSendMax;
+                               //exitLoop = true;
+                       }else
+                       {       //Not fullsim, we don't respond
+                               // We do not know what to answer, so lets keep quiet
+                               modulated_response = resp_sof; modulated_response_size = 0;
+                               trace_data = NULL;
+                               trace_data_size = 0;
+                               if (simulationMode == MODE_EXIT_AFTER_MAC){
+                                       // 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;

                                }
                                }

-                               exitLoop = true;

                        }
                        }

-               } else if(receivedCmd[0] == 0x00 && len == 1) {
+
+               } else if(receivedCmd[0] == ICLASS_CMD_HALT && len == 1) {

                        // Reader ends the session
                        // Reader ends the session

-                       modulated_response = resp1; modulated_response_size = 0; //order = 0;
+                       modulated_response = resp_sof; modulated_response_size = 0; //order = 0;

                        trace_data = NULL;
                        trace_data_size = 0;
                        trace_data = NULL;
                        trace_data_size = 0;

-               } else {
+               } else if(simulationMode == MODE_FULLSIM && receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 4){
+                       //Read block
+                       uint16_t blk = receivedCmd[1];
+                       trace_data = emulator+(blk << 3);
+                       trace_data_size = 8;
+                       CodeIClassTagAnswer(trace_data , trace_data_size);
+                       memcpy(data_response, ToSend, ToSendMax);
+                       modulated_response = data_response;
+                       modulated_response_size = ToSendMax;
+               }
+               else if(receivedCmd[0] == ICLASS_CMD_PAGESEL)
+               {//Pagesel
+                       //Pagesel enables to select a page in the selected chip memory and return its configuration block
+                       //Chips with a single page will not answer to this command
+                       // It appears we're fine ignoring this.
+                       //Otherwise, we should answer 8bytes (block) + 2bytes CRC
+               }
+               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",
                        //#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",


@@ -1202,7 +1275,7 @@ int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader
                        receivedCmd[3], receivedCmd[4], receivedCmd[5],
                        receivedCmd[6], receivedCmd[7], receivedCmd[8]);
                        // Do not respond
                        receivedCmd[3], receivedCmd[4], receivedCmd[5],
                        receivedCmd[6], receivedCmd[7], receivedCmd[8]);
                        // Do not respond

-                       modulated_response = resp1; modulated_response_size = 0; //order = 0;
+                       modulated_response = resp_sof; modulated_response_size = 0; //order = 0;

                        trace_data = NULL;
                        trace_data_size = 0;
                }
                        trace_data = NULL;
                        trace_data_size = 0;
                }


@@ -1483,8 +1556,8 @@ void setupIclassReader()
 {
     FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
     // Reset trace buffer
 {
     FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
     // Reset trace buffer

-    iso14a_set_tracing(TRUE);
-    iso14a_clear_trace();
+       set_tracing(TRUE);
+       clear_trace();

 
     // Setup SSC
     FpgaSetupSsc();
 
     // Setup SSC
     FpgaSetupSsc();


@@ -1529,7 +1602,7 @@ uint8_t handshakeIclassTag(uint8_t *card_data)
        static uint8_t identify[]    = { 0x0c };
        static uint8_t select[]      = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
        static uint8_t readcheck_cc[]= { 0x88, 0x02 };
        static uint8_t identify[]    = { 0x0c };
        static uint8_t select[]      = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
        static uint8_t readcheck_cc[]= { 0x88, 0x02 };

-       uint8_t *resp = (((uint8_t *)BigBuf) + RECV_RESP_OFFSET);
+       uint8_t resp[ICLASS_BUFFER_SIZE];

 
        uint8_t read_status = 0;
 
 
        uint8_t read_status = 0;
 


@@ -1580,14 +1653,14 @@ void ReaderIClass(uint8_t arg0) {
     int read_status= 0;
     bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE;
        bool get_cc = arg0 & FLAG_ICLASS_READER_GET_CC;
     int read_status= 0;
     bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE;
        bool get_cc = arg0 & FLAG_ICLASS_READER_GET_CC;

-
+       set_tracing(TRUE);

     setupIclassReader();
 
     size_t datasize = 0;
     while(!BUTTON_PRESS())
     {
 
     setupIclassReader();
 
     size_t datasize = 0;
     while(!BUTTON_PRESS())
     {
 

-               if(traceLen > TRACE_SIZE) {
+               if(!tracing) {

                        DbpString("Trace full");
                        break;
                }
                        DbpString("Trace full");
                        break;
                }


@@ -1599,6 +1672,17 @@ void ReaderIClass(uint8_t arg0) {
                if(read_status == 1) datasize = 8;
                if(read_status == 2) datasize = 16;
 
                if(read_status == 1) datasize = 8;
                if(read_status == 2) datasize = 16;
 

+               //Todo, read the public blocks 1,5 aswell:
+               //
+               // 0 : CSN (we already have)
+               // 1 : Configuration
+               // 2 : e-purse (we already have)
+               // (3,4 write-only)
+               // 5 Application issuer area
+               //
+               //Then we can 'ship' back the 8 * 5 bytes of data,
+               // with 0xFF:s in block 3 and 4.
+

                LED_B_ON();
                //Send back to client, but don't bother if we already sent this
                if(memcmp(last_csn, card_data, 8) != 0)
                LED_B_ON();
                //Send back to client, but don't bother if we already sent this
                if(memcmp(last_csn, card_data, 8) != 0)


@@ -1650,16 +1734,16 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
          int keyaccess;
        } memory;
        
          int keyaccess;
        } memory;
        

-       uint8_t* resp = (((uint8_t *)BigBuf) + RECV_RESP_OFFSET);
+       uint8_t resp[ICLASS_BUFFER_SIZE];

        
     setupIclassReader();
        
     setupIclassReader();

-
+       set_tracing(TRUE);

 
        while(!BUTTON_PRESS()) {
        
                WDT_HIT();
 
 
        while(!BUTTON_PRESS()) {
        
                WDT_HIT();
 

-               if(traceLen > TRACE_SIZE) {
+               if(!tracing) {

                        DbpString("Trace full");
                        break;
                }
                        DbpString("Trace full");
                        break;
                }


@@ -1700,7 +1784,7 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
                //Set card_data to all zeroes, we'll fill it with data
                memset(card_data,0x0,USB_CMD_DATA_SIZE);
                uint8_t failedRead =0;
                //Set card_data to all zeroes, we'll fill it with data
                memset(card_data,0x0,USB_CMD_DATA_SIZE);
                uint8_t failedRead =0;

-               uint8_t stored_data_length =0;
+               uint32_t stored_data_length =0;

                //then loop around remaining blocks
                for(int block=0; block < cardsize; block++){
 
                //then loop around remaining blocks
                for(int block=0; block < cardsize; block++){
 


@@ -1719,7 +1803,6 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
                                //Fill up the buffer
                                memcpy(card_data+stored_data_length,resp,8);
                                stored_data_length += 8;
                                //Fill up the buffer
                                memcpy(card_data+stored_data_length,resp,8);
                                stored_data_length += 8;

-

                                if(stored_data_length +8 > USB_CMD_DATA_SIZE)
                                {//Time to send this off and start afresh
                                        cmd_send(CMD_ACK,
                                if(stored_data_length +8 > USB_CMD_DATA_SIZE)
                                {//Time to send this off and start afresh
                                        cmd_send(CMD_ACK,


@@ -1738,6 +1821,7 @@ void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
                                Dbprintf("Failed to dump block %d", block);
                        }
                }
                                Dbprintf("Failed to dump block %d", block);
                        }
                }

+

                //Send off any remaining data
                if(stored_data_length > 0)
                {
                //Send off any remaining data
                if(stored_data_length > 0)
                {