]> git.zerfleddert.de Git - proxmark3-svn/blobdiff - armsrc/iclass.c
Updated proxmark research with Holiman's loclass framework
[proxmark3-svn] / armsrc / iclass.c
index 37006e5126dd8f288f5ed1c95e757d8810fc5793..c827ed51d6517c49301a71951bf593bca592393e 100644 (file)
@@ -45,6 +45,7 @@
 // same construction as in ISO 14443;
 // different initial value (CRC_ICLASS)
 #include "iso14443crc.h"
+#include "iso15693tools.h"
 
 static int timeout = 4096;
 
@@ -60,22 +61,6 @@ static int timeout = 4096;
 #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);
 
 //-----------------------------------------------------------------------------
@@ -687,7 +672,7 @@ void RAMFUNC SnoopIClass(void)
 // #define RECV_RES_OFFSET   3096
 // #define DMA_BUFFER_OFFSET 3160
 // #define DMA_BUFFER_SIZE   4096
-// #define TRACE_LENGTH      3000
+// #define TRACE_SIZE        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
@@ -707,7 +692,7 @@ void RAMFUNC SnoopIClass(void)
     
     // 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
@@ -816,7 +801,7 @@ void RAMFUNC SnoopIClass(void)
                        trace[traceLen++] = Uart.byteCnt;
                        memcpy(trace+traceLen, receivedCmd, Uart.byteCnt);
                        traceLen += Uart.byteCnt;
-                       if(traceLen > TRACE_LENGTH) break;
+                       if(traceLen > TRACE_SIZE) break;
                    //}
                    /* And ready to receive another command. */
                    Uart.state = STATE_UNSYNCD;
@@ -848,7 +833,7 @@ void RAMFUNC SnoopIClass(void)
                    trace[traceLen++] = Demod.len;
                    memcpy(trace+traceLen, receivedResponse, Demod.len);
                    traceLen += Demod.len;
-                   if(traceLen > TRACE_LENGTH) break;
+                   if(traceLen > TRACE_SIZE) break;
 
                    //triggered = TRUE;
 
@@ -885,20 +870,10 @@ done:
     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 +884,7 @@ void rotateCSN(uint8_t* originalCSN, uint8_t* rotatedCSN, int direction) {
 //-----------------------------------------------------------------------------
 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();
@@ -1019,38 +994,19 @@ static void CodeIClassTagSOF()
 //-----------------------------------------------------------------------------
 void SimulateIClass(uint8_t arg0, 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;
-       
-       iso14a_set_tracing(TRUE);
-       iso14a_clear_tracelen();
-       iso14a_set_trigger(FALSE);
 
-       // PREPARE PROTOCOL MESSAGES FIRST
-       
-       // Pointers to tag answers that should be stored in the buffer
-       uint8_t *response;
-       int responselength;
+  // Enable and clear the trace
+       tracing = TRUE;
+       traceLen = 0;
+  memset(trace, 0x44, TRACE_SIZE);
 
        // 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 response3[] = { 0x00, 0x0B, 0x0F, 0xFF, 0xF7, 0xFF, 0x12, 0xE0, 0x00, 0x00 };
-       int response1length = 1;
-       int response2length = 10;
-       int response3length = 10;
+       uint8_t response3[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 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
@@ -1058,7 +1014,7 @@ void SimulateIClass(uint8_t arg0, uint8_t *datain)
        }
 
        // Construct anticollision-CSN
-       rotateCSN(response3,response2,0);
+       rotateCSN(response3,response2);
 
        // Compute CRC on both CSNs
        ComputeCrc14443(CRC_ICLASS, response2, 8, &response2[8], &response2[9]);
@@ -1071,37 +1027,36 @@ void SimulateIClass(uint8_t arg0, uint8_t *datain)
        // 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
-       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)
-       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)
-       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)
-       uint8_t *resp4 = (((uint8_t *)BigBuf) + 270 + SMALL_BUFFER_OFFSET);
+       uint8_t *resp4 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 370);
        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;
 
-       // Reset trace buffer
-        memset(trace, 0x44, RECV_CMD_OFFSET);
-
        // Prepare card messages
        ToSendMax = 0;
 
@@ -1115,7 +1070,7 @@ void SimulateIClass(uint8_t arg0, uint8_t *datain)
 
        // 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));
@@ -1126,50 +1081,52 @@ void SimulateIClass(uint8_t arg0, uint8_t *datain)
        FpgaSetupSsc();
 
        // To control where we are in the protocol
-       //int order = 0;
-       // int lastorder; // NOT USED
        int cmdsRecvd = 0;
-       resp = resp1; respLen = 0;
-       response = response1; responselength = response1length;
+
        LED_A_ON();
        for(;;) {
                LED_B_OFF();
                if(!GetIClassCommandFromReader(receivedCmd, &len, 100)) {
-                       DbpString("button press");
+                       DbpString("button press");
                        break;
-                       }
+               }
 
-               // 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;
-                       response = response1; responselength = response1length;
+                       respdata = &sof;
+                       respsize = sizeof(sof);
                        //resp = resp2; respLen = resp2Len; order = 2;
                        //DbpString("Hello request from reader:");
                } 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
-                       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;
-                       response = response4; responselength = response4length;
+                       respdata = response4;
+                       respsize = sizeof(response4);
                        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",
+/*
+                       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],
@@ -1179,10 +1136,14 @@ void SimulateIClass(uint8_t arg0, uint8_t *datain)
                        // Do not respond
                        // We do not know what to answer, so lets keep quit
                        resp = resp1; respLen = 0; //order = 5;
+                       respdata = NULL;
+                       respsize = 0;
                } else if(receivedCmd[0] == 0x00 && len == 1) {
                        // Reader ends the session
                        resp = resp1; respLen = 0; //order = 0;
-               } else {
+                       respdata = NULL;
+                       respsize = 0;
+               } else {
                        // Never seen this command before
                        Dbprintf("Unknown command received from reader (len=%d): %x %x %x %x %x %x %x %x %x",
                        len,
@@ -1191,7 +1152,8 @@ void SimulateIClass(uint8_t arg0, uint8_t *datain)
                        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) {
@@ -1202,27 +1164,25 @@ void SimulateIClass(uint8_t arg0, uint8_t *datain)
                        cmdsRecvd++;
                }
 
-               if(respLen <= 0) continue;
-
-               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);
+               if(respLen > 0) {
+                       SendIClassAnswer(resp, respLen, 21);
+               }
+               
+               if (tracing) {
+                       LogTrace(receivedCmd,len, rsamples, Uart.parityBits, TRUE);
+                       if (respdata != NULL) {
+                               LogTrace(respdata,respsize, rsamples, SwapBits(GetParity(respdata,respsize),respsize), FALSE);
+                       }
+                       if(traceLen > TRACE_SIZE) {
+                               DbpString("Trace full");
+                               break;
                        }
-               } else if(!fullbuffer) {
-                       DbpString("Trace buffer is full now...");
-                       fullbuffer = TRUE;
                }
 
-               memset(receivedCmd, 0x44, 32);
-    }
+               memset(receivedCmd, 0x44, RECV_CMD_SIZE);
+       }
 
-       //Dbprintf("Commands received: %d", cmdsRecvd);
+       Dbprintf("%x", cmdsRecvd);
        LED_A_OFF();
        LED_B_OFF();
 }
@@ -1231,6 +1191,9 @@ static int SendIClassAnswer(uint8_t *resp, int respLen, int delay)
 {
        int i = 0, u = 0, d = 0;
        uint8_t b = 0;
+       // return 0;
+       // Modulate Manchester
+       // FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_MOD424);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_MOD);
        AT91C_BASE_SSC->SSC_THR = 0x00;
        FpgaSetupSsc();
@@ -1387,7 +1350,7 @@ void ReaderTransmitIClass(uint8_t* frame, int len)
        LED_A_ON();
 
   // Store reader command in buffer
-  if (tracing) LogTrace(frame,len,0,par,TRUE);
+  if (tracing) LogTrace(frame,len,rsamples,par,TRUE);
 }
 
 //-----------------------------------------------------------------------------
@@ -1445,21 +1408,17 @@ int ReaderReceiveIClass(uint8_t* receivedAnswer)
 {
   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) {
-       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 check_csn[]   = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
 
        uint8_t* resp = (((uint8_t *)BigBuf) + 3560);   // was 3560 - tied to other size changes
 
@@ -1485,47 +1444,180 @@ void ReaderIClass(uint8_t arg0) {
        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);
-                       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();
+}
+
+void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
+       uint8_t act_all[]     = { 0x0a };
+       uint8_t identify[]    = { 0x0c };
+       uint8_t select[]      = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+       uint8_t readcheck_cc[]= { 0x88, 0x02 };
+       uint8_t check[]       = { 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+       uint8_t read[]        = { 0x0c, 0x00, 0x00, 0x00 };
+       
+        uint16_t crc = 0;
+       uint8_t cardsize=0;
+       bool read_success=false;
+       uint8_t mem=0;
+       
+       static struct memory_t{
+         int k16;
+         int book;
+         int k2;
+         int lockauth;
+         int keyaccess;
+       } memory;
+       
+       uint8_t* resp = (((uint8_t *)BigBuf) + 3560);   // was 3560 - tied to other size changes
 
+       // Reset trace buffer
+       memset(trace, 0x44, RECV_CMD_OFFSET);
+       traceLen = 0;
+
+       // Setup SSC
+       FpgaSetupSsc();
+       // Start from off (no field generated)
+       // Signal field is off with the appropriate LED
+       LED_D_OFF();
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       SpinDelay(200);
+
+       SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+
+       // Now give it time to spin up.
+       // Signal field is on with the appropriate LED
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_READER_MOD);
+       SpinDelay(200);
+
+       LED_A_ON();
+
+       for(int i=0;i<1;i++) {
+       
+               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);
+                       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
+                               Dbprintf("Readcheck on Sector 2");
+                               ReaderTransmitIClass(readcheck_cc, sizeof(readcheck_cc));
+                               if(ReaderReceiveIClass(resp) == 8) {
+                                  Dbprintf("     CC: %02x %02x %02x %02x %02x %02x %02x %02x",
+                                       resp[0], resp[1], resp[2],
+                                       resp[3], resp[4], resp[5],
+                                       resp[6], resp[7]);
+                               }else return;
+                               Dbprintf("Authenticate");
+                               //for now replay captured auth (as cc not updated)
+                               memcpy(check+5,MAC,4);
+                               Dbprintf("     AA: %02x %02x %02x %02x",
+                                       check[5], check[6], check[7],check[8]);
+                               ReaderTransmitIClass(check, sizeof(check));
+                               if(ReaderReceiveIClass(resp) == 4) {
+                                  Dbprintf("     AR: %02x %02x %02x %02x",
+                                       resp[0], resp[1], resp[2],resp[3]);
+                               }else {
+                                 Dbprintf("Error: Authentication Fail!");
+                                 return;
+                               }
+                               Dbprintf("Dump Contents");
+                               //first get configuration block
+                               read_success=false;
+                               read[1]=1;
+                               uint8_t *blockno=&read[1];
+                               crc = iclass_crc16((char *)blockno,1);
+                               read[2] = crc >> 8;
+                               read[3] = crc & 0xff;
+                               while(!read_success){
+                                     ReaderTransmitIClass(read, sizeof(read));
+                                     if(ReaderReceiveIClass(resp) == 10) {
+                                        read_success=true;
+                                        mem=resp[5];
+                                        memory.k16= (mem & 0x80);
+                                        memory.book= (mem & 0x20);
+                                        memory.k2= (mem & 0x8);
+                                        memory.lockauth= (mem & 0x2);
+                                        memory.keyaccess= (mem & 0x1);
+
+                                     }
+                               }
+                               if (memory.k16){
+                                 cardsize=255;
+                               }else cardsize=32;
+                               //then loop around remaining blocks
+                               for(uint8_t j=0; j<cardsize; j++){
+                                   read_success=false;
+                                   uint8_t *blockno=&j;
+                                   //crc_data[0]=j;
+                                   read[1]=j;
+                                   crc = iclass_crc16((char *)blockno,1);
+                                   read[2] = crc >> 8;
+                                   read[3] = crc & 0xff;
+                                   while(!read_success){
+                                     ReaderTransmitIClass(read, sizeof(read));
+                                     if(ReaderReceiveIClass(resp) == 10) {
+                                        read_success=true;
+                                        Dbprintf("     %02x: %02x %02x %02x %02x %02x %02x %02x %02x",
+                                         j, resp[0], resp[1], resp[2],
+                                         resp[3], resp[4], resp[5],
+                                         resp[6], resp[7]);
+                                     }
+                                   }
+                               }
+                       }
+               }
+               WDT_HIT();
+       }
+       
+       LED_A_OFF();
 }
 
+
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