fix "hf mf chk" <t|d|s|ss> flags (based on PR #700) (#718)

[proxmark3-svn] / armsrc / iso14443a.c

diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index d648beee338f293b08c45bc9db62d2bf5f019d75..7bf8f5af7d110e4f440b933ebed4f5c1f8138052 100644 (file)
--- a/armsrc/iso14443a.c
+++ b/armsrc/iso14443a.c
@@ -12,10 +12,11 @@
 
 #include "iso14443a.h"
 
 
 #include "iso14443a.h"
 

+#include <stdio.h>
+#include <string.h>

 #include "proxmark3.h"
 #include "apps.h"
 #include "util.h"
 #include "proxmark3.h"
 #include "apps.h"
 #include "util.h"

-#include "string.h"

 #include "cmd.h"
 #include "iso14443crc.h"
 #include "crapto1/crapto1.h"
 #include "cmd.h"
 #include "iso14443crc.h"
 #include "crapto1/crapto1.h"


@@ -80,6 +81,8 @@ typedef struct {
 } tUart;
 
 static uint32_t iso14a_timeout;
 } tUart;
 
 static uint32_t iso14a_timeout;

+#define MAX_ISO14A_TIMEOUT 524288
+

 int rsamples = 0;
 uint8_t trigger = 0;
 // the block number for the ISO14443-4 PCB
 int rsamples = 0;
 uint8_t trigger = 0;
 // the block number for the ISO14443-4 PCB


@@ -132,13 +135,13 @@ uint16_t FpgaSendQueueDelay;
 #define DELAY_FPGA_QUEUE (FpgaSendQueueDelay<<1)
 
 // When the PM acts as tag and is sending, it takes
 #define DELAY_FPGA_QUEUE (FpgaSendQueueDelay<<1)
 
 // When the PM acts as tag and is sending, it takes

-// 4*16 ticks until we can write data to the sending hold register
+// 4*16 + 8 ticks until we can write data to the sending hold register

 // 8*16 ticks until the SHR is transferred to the Sending Shift Register
 // 8*16 ticks until the SHR is transferred to the Sending Shift Register

-// 8 ticks until the first transfer starts
-// 8 ticks later the FPGA samples the data
-// + a varying number of ticks in the FPGA Delay Queue (mod_sig_buf)
+// 8 ticks later the FPGA samples the first data
+// + 16 ticks until assigned to mod_sig

 // + 1 tick to assign mod_sig_coil
 // + 1 tick to assign mod_sig_coil

-#define DELAY_ARM2AIR_AS_TAG (4*16 + 8*16 + 8 + 8 + DELAY_FPGA_QUEUE + 1)
+// + a varying number of ticks in the FPGA Delay Queue (mod_sig_buf)
+#define DELAY_ARM2AIR_AS_TAG (4*16 + 8 + 8*16 + 8 + 16 + 1 + DELAY_FPGA_QUEUE)

 
 // When the PM acts as sniffer and is receiving tag data, it takes
 // 3 ticks A/D conversion
 
 // When the PM acts as sniffer and is receiving tag data, it takes
 // 3 ticks A/D conversion


@@ -186,33 +189,16 @@ void iso14a_set_trigger(bool enable) {
 
 
 void iso14a_set_timeout(uint32_t timeout) {
 
 
 void iso14a_set_timeout(uint32_t timeout) {

-       iso14a_timeout = timeout;
-       if(MF_DBGLEVEL >= 3) Dbprintf("ISO14443A Timeout set to %ld (%dms)", iso14a_timeout, iso14a_timeout / 106);
+       // adjust timeout by FPGA delays and 2 additional ssp_frames to detect SOF
+       iso14a_timeout = timeout + (DELAY_AIR2ARM_AS_READER + DELAY_ARM2AIR_AS_READER)/(16*8) + 2;
+       if(MF_DBGLEVEL >= 3) Dbprintf("ISO14443A Timeout set to %ld (%dms)", timeout, timeout / 106);

 }
 
 
 }
 
 

-void iso14a_set_ATS_timeout(uint8_t *ats) {
-
-       uint8_t tb1;
-       uint8_t fwi; 
-       uint32_t fwt;
-       
-       if (ats[0] > 1) {                                                       // there is a format byte T0
-               if ((ats[1] & 0x20) == 0x20) {                  // there is an interface byte TB(1)
-                       if ((ats[1] & 0x10) == 0x10) {          // there is an interface byte TA(1) preceding TB(1)
-                               tb1 = ats[3];
-                       } else {
-                               tb1 = ats[2];
-                       }
-                       fwi = (tb1 & 0xf0) >> 4;                        // frame waiting indicator (FWI)
-                       fwt = 256 * 16 * (1 << fwi);            // frame waiting time (FWT) in 1/fc
-                       
-                       iso14a_set_timeout(fwt/(8*16));
-               }
-       }
+uint32_t iso14a_get_timeout(void) {
+       return iso14a_timeout - (DELAY_AIR2ARM_AS_READER + DELAY_ARM2AIR_AS_READER)/(16*8) - 2;

 }
 
 }
 

-

 //-----------------------------------------------------------------------------
 // Generate the parity value for a byte sequence
 //
 //-----------------------------------------------------------------------------
 // Generate the parity value for a byte sequence
 //


@@ -246,7 +232,7 @@ void AppendCrc14443a(uint8_t* data, int len)
        ComputeCrc14443(CRC_14443_A,data,len,data+len,data+len+1);
 }
 
        ComputeCrc14443(CRC_14443_A,data,len,data+len,data+len+1);
 }
 

-void AppendCrc14443b(uint8_t* data, int len)
+static void AppendCrc14443b(uint8_t* data, int len)

 {
        ComputeCrc14443(CRC_14443_B,data,len,data+len,data+len+1);
 }
 {
        ComputeCrc14443(CRC_14443_B,data,len,data+len,data+len+1);
 }


@@ -283,7 +269,7 @@ const bool Mod_Miller_LUT[] = {
 #define IsMillerModulationNibble1(b) (Mod_Miller_LUT[(b & 0x000000F0) >> 4])
 #define IsMillerModulationNibble2(b) (Mod_Miller_LUT[(b & 0x0000000F)])
 
 #define IsMillerModulationNibble1(b) (Mod_Miller_LUT[(b & 0x000000F0) >> 4])
 #define IsMillerModulationNibble2(b) (Mod_Miller_LUT[(b & 0x0000000F)])
 

-void UartReset()
+static void UartReset()

 {
        Uart.state = STATE_UNSYNCD;
        Uart.bitCount = 0;
 {
        Uart.state = STATE_UNSYNCD;
        Uart.bitCount = 0;


@@ -295,7 +281,7 @@ void UartReset()
        Uart.endTime = 0;
 }
 
        Uart.endTime = 0;
 }
 

-void UartInit(uint8_t *data, uint8_t *parity)
+static void UartInit(uint8_t *data, uint8_t *parity)

 {
        Uart.output = data;
        Uart.parity = parity;
 {
        Uart.output = data;
        Uart.parity = parity;


@@ -455,7 +441,7 @@ const bool Mod_Manchester_LUT[] = {
 #define IsManchesterModulationNibble2(b) (Mod_Manchester_LUT[(b & 0x000F)])
 
 
 #define IsManchesterModulationNibble2(b) (Mod_Manchester_LUT[(b & 0x000F)])
 
 

-void DemodReset()
+static void DemodReset()

 {
        Demod.state = DEMOD_UNSYNCD;
        Demod.len = 0;                                          // number of decoded data bytes
 {
        Demod.state = DEMOD_UNSYNCD;
        Demod.len = 0;                                          // number of decoded data bytes


@@ -469,7 +455,7 @@ void DemodReset()
        Demod.endTime = 0;
 }
 
        Demod.endTime = 0;
 }
 

-void DemodInit(uint8_t *data, uint8_t *parity)
+static void DemodInit(uint8_t *data, uint8_t *parity)

 {
        Demod.output = data;
        Demod.parity = parity;
 {
        Demod.output = data;
        Demod.parity = parity;


@@ -793,14 +779,6 @@ static void CodeIso14443aAsTagPar(const uint8_t *cmd, uint16_t len, uint8_t *par
        ToSendMax++;
 }
 
        ToSendMax++;
 }
 

-static void CodeIso14443aAsTag(const uint8_t *cmd, uint16_t len)
-{
-       uint8_t par[MAX_PARITY_SIZE];
-       
-       GetParity(cmd, len, par);
-       CodeIso14443aAsTagPar(cmd, len, par);
-}
-

 
 static void Code4bitAnswerAsTag(uint8_t cmd)
 {
 
 static void Code4bitAnswerAsTag(uint8_t cmd)
 {


@@ -840,6 +818,38 @@ static void Code4bitAnswerAsTag(uint8_t cmd)
        ToSendMax++;
 }
 
        ToSendMax++;
 }
 

+
+static uint8_t *LastReaderTraceTime = NULL;
+
+static void EmLogTraceReader(void) {
+       // remember last reader trace start to fix timing info later
+       LastReaderTraceTime = BigBuf_get_addr() + BigBuf_get_traceLen();
+       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
+}
+
+
+static void FixLastReaderTraceTime(uint32_t tag_StartTime) {
+       uint32_t reader_EndTime = Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG;
+       uint32_t reader_StartTime = Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG;
+       uint16_t reader_modlen = reader_EndTime - reader_StartTime;
+       uint16_t approx_fdt = tag_StartTime - reader_EndTime;
+       uint16_t exact_fdt = (approx_fdt - 20 + 32)/64 * 64 + 20;
+       reader_StartTime = tag_StartTime - exact_fdt - reader_modlen;
+       LastReaderTraceTime[0] = (reader_StartTime >> 0) & 0xff;
+       LastReaderTraceTime[1] = (reader_StartTime >> 8) & 0xff;
+       LastReaderTraceTime[2] = (reader_StartTime >> 16) & 0xff;
+       LastReaderTraceTime[3] = (reader_StartTime >> 24) & 0xff;
+}
+
+       
+static void EmLogTraceTag(uint8_t *tag_data, uint16_t tag_len, uint8_t *tag_Parity, uint32_t ProxToAirDuration) {
+       uint32_t tag_StartTime = LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_TAG;
+       uint32_t tag_EndTime = (LastTimeProxToAirStart + ProxToAirDuration)*16 + DELAY_ARM2AIR_AS_TAG;
+       LogTrace(tag_data, tag_len, tag_StartTime, tag_EndTime, tag_Parity, false);
+       FixLastReaderTraceTime(tag_StartTime);
+}
+
+

 //-----------------------------------------------------------------------------
 // Wait for commands from reader
 // Stop when button is pressed
 //-----------------------------------------------------------------------------
 // Wait for commands from reader
 // Stop when button is pressed


@@ -868,33 +878,22 @@ static int GetIso14443aCommandFromReader(uint8_t *received, uint8_t *parity, int
             b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
                        if(MillerDecoding(b, 0)) {
                                *len = Uart.len;
             b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
                        if(MillerDecoding(b, 0)) {
                                *len = Uart.len;

+                               EmLogTraceReader();

                                return true;
                        }
                }
     }
 }
 
                                return true;
                        }
                }
     }
 }
 

-static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNeeded);
-int EmSend4bitEx(uint8_t resp, bool correctionNeeded);
+
+static int EmSend4bitEx(uint8_t resp);

 int EmSend4bit(uint8_t resp);
 int EmSend4bit(uint8_t resp);

-int EmSendCmdExPar(uint8_t *resp, uint16_t respLen, bool correctionNeeded, uint8_t *par);
-int EmSendCmdEx(uint8_t *resp, uint16_t respLen, bool correctionNeeded);
-int EmSendCmd(uint8_t *resp, uint16_t respLen);
-int EmSendCmdPar(uint8_t *resp, uint16_t respLen, uint8_t *par);
-bool EmLogTrace(uint8_t *reader_data, uint16_t reader_len, uint32_t reader_StartTime, uint32_t reader_EndTime, uint8_t *reader_Parity,
-                                uint8_t *tag_data, uint16_t tag_len, uint32_t tag_StartTime, uint32_t tag_EndTime, uint8_t *tag_Parity);
+static int EmSendCmdExPar(uint8_t *resp, uint16_t respLen, uint8_t *par);
+int EmSendCmdEx(uint8_t *resp, uint16_t respLen);
+int EmSendPrecompiledCmd(tag_response_info_t *response_info);

 
 

-static uint8_t* free_buffer_pointer;

 
 

-typedef struct {
-  uint8_t* response;
-  size_t   response_n;
-  uint8_t* modulation;
-  size_t   modulation_n;
-  uint32_t ProxToAirDuration;
-} tag_response_info_t;
-
-bool prepare_tag_modulation(tag_response_info_t* response_info, size_t max_buffer_size) {
+static bool prepare_tag_modulation(tag_response_info_t* response_info, size_t max_buffer_size) {

        // Example response, answer to MIFARE Classic read block will be 16 bytes + 2 CRC = 18 bytes
        // This will need the following byte array for a modulation sequence
        //    144        data bits (18 * 8)
        // Example response, answer to MIFARE Classic read block will be 16 bytes + 2 CRC = 18 bytes
        // This will need the following byte array for a modulation sequence
        //    144        data bits (18 * 8)


@@ -908,17 +907,18 @@ bool prepare_tag_modulation(tag_response_info_t* response_info, size_t max_buffe
  
  
   // Prepare the tag modulation bits from the message
  
  
   // Prepare the tag modulation bits from the message

-  CodeIso14443aAsTag(response_info->response,response_info->response_n);
+  GetParity(response_info->response, response_info->response_n, &(response_info->par));
+  CodeIso14443aAsTagPar(response_info->response,response_info->response_n, &(response_info->par));

   
   // Make sure we do not exceed the free buffer space
   if (ToSendMax > max_buffer_size) {
     Dbprintf("Out of memory, when modulating bits for tag answer:");
   
   // Make sure we do not exceed the free buffer space
   if (ToSendMax > max_buffer_size) {
     Dbprintf("Out of memory, when modulating bits for tag answer:");

-    Dbhexdump(response_info->response_n,response_info->response,false);
+    Dbhexdump(response_info->response_n, response_info->response, false);

     return false;
   }
   
   // Copy the byte array, used for this modulation to the buffer position
     return false;
   }
   
   // Copy the byte array, used for this modulation to the buffer position

-  memcpy(response_info->modulation,ToSend,ToSendMax);
+  memcpy(response_info->modulation, ToSend, ToSendMax);

   
   // Store the number of bytes that were used for encoding/modulation and the time needed to transfer them
   response_info->modulation_n = ToSendMax;
   
   // Store the number of bytes that were used for encoding/modulation and the time needed to transfer them
   response_info->modulation_n = ToSendMax;


@@ -930,21 +930,20 @@ bool prepare_tag_modulation(tag_response_info_t* response_info, size_t max_buffe
 
 // "precompile" responses. There are 7 predefined responses with a total of 28 bytes data to transmit.
 // Coded responses need one byte per bit to transfer (data, parity, start, stop, correction) 
 
 // "precompile" responses. There are 7 predefined responses with a total of 28 bytes data to transmit.
 // Coded responses need one byte per bit to transfer (data, parity, start, stop, correction) 

-// 28 * 8 data bits, 28 * 1 parity bits, 7 start bits, 7 stop bits, 7 correction bits
+// 28 * 8 data bits, 28 * 1 parity bits, 7 start bits, 7 stop bits, 7 correction bits for the modulation

 // -> need 273 bytes buffer
 #define ALLOCATED_TAG_MODULATION_BUFFER_SIZE 273
 
 // -> need 273 bytes buffer
 #define ALLOCATED_TAG_MODULATION_BUFFER_SIZE 273
 

-bool prepare_allocated_tag_modulation(tag_response_info_t* response_info) {
+bool prepare_allocated_tag_modulation(tag_response_info_t* response_info, uint8_t **buffer, size_t *max_buffer_size) {
+

   // Retrieve and store the current buffer index
   // Retrieve and store the current buffer index

-  response_info->modulation = free_buffer_pointer;
-  
-  // Determine the maximum size we can use from our buffer
-  size_t max_buffer_size = ALLOCATED_TAG_MODULATION_BUFFER_SIZE;
+  response_info->modulation = *buffer;

   
   // Forward the prepare tag modulation function to the inner function
   
   // Forward the prepare tag modulation function to the inner function

-  if (prepare_tag_modulation(response_info, max_buffer_size)) {
-    // Update the free buffer offset
-    free_buffer_pointer += ToSendMax;
+  if (prepare_tag_modulation(response_info, *max_buffer_size)) {
+    // Update the free buffer offset and the remaining buffer size
+    *buffer += ToSendMax;
+       *max_buffer_size -= ToSendMax;

     return true;
   } else {
     return false;
     return true;
   } else {
     return false;


@@ -1074,8 +1073,8 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
        // allocate buffers:
        uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE);
        uint8_t *receivedCmdPar = BigBuf_malloc(MAX_PARITY_SIZE);
        // allocate buffers:
        uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE);
        uint8_t *receivedCmdPar = BigBuf_malloc(MAX_PARITY_SIZE);

-       free_buffer_pointer = BigBuf_malloc(ALLOCATED_TAG_MODULATION_BUFFER_SIZE);
-
+       uint8_t *free_buffer_pointer = BigBuf_malloc(ALLOCATED_TAG_MODULATION_BUFFER_SIZE);
+       size_t free_buffer_size = ALLOCATED_TAG_MODULATION_BUFFER_SIZE;

        // clear trace
        clear_trace();
        set_tracing(true);
        // clear trace
        clear_trace();
        set_tracing(true);


@@ -1083,7 +1082,7 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
        // Prepare the responses of the anticollision phase
        // there will be not enough time to do this at the moment the reader sends it REQA
        for (size_t i=0; i<TAG_RESPONSE_COUNT; i++) {
        // Prepare the responses of the anticollision phase
        // there will be not enough time to do this at the moment the reader sends it REQA
        for (size_t i=0; i<TAG_RESPONSE_COUNT; i++) {

-               prepare_allocated_tag_modulation(&responses[i]);
+               prepare_allocated_tag_modulation(&responses[i], &free_buffer_pointer, &free_buffer_size);

        }
 
        int len = 0;
        }
 
        int len = 0;


@@ -1125,15 +1124,11 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
                } else if(receivedCmd[1] == 0x70 && receivedCmd[0] == 0x95) {   // Received a SELECT (cascade 2)
                        p_response = &responses[4]; order = 30;
                } else if(receivedCmd[0] == 0x30) {     // Received a (plain) READ
                } else if(receivedCmd[1] == 0x70 && receivedCmd[0] == 0x95) {   // Received a SELECT (cascade 2)
                        p_response = &responses[4]; order = 30;
                } else if(receivedCmd[0] == 0x30) {     // Received a (plain) READ

-                       EmSendCmdEx(data+(4*receivedCmd[1]),16,false);
+                       EmSendCmdEx(data+(4*receivedCmd[1]),16);

                        // Dbprintf("Read request from reader: %x %x",receivedCmd[0],receivedCmd[1]);
                        // We already responded, do not send anything with the EmSendCmd14443aRaw() that is called below
                        p_response = NULL;
                } else if(receivedCmd[0] == 0x50) {     // Received a HALT
                        // Dbprintf("Read request from reader: %x %x",receivedCmd[0],receivedCmd[1]);
                        // We already responded, do not send anything with the EmSendCmd14443aRaw() that is called below
                        p_response = NULL;
                } else if(receivedCmd[0] == 0x50) {     // Received a HALT

-
-                       if (tracing) {
-                               LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                       }

                        p_response = NULL;
                } else if(receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61) {   // Received an authentication request
                        p_response = &responses[5]; order = 7;
                        p_response = NULL;
                } else if(receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61) {   // Received an authentication request
                        p_response = &responses[5]; order = 7;


@@ -1145,9 +1140,6 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
                                p_response = &responses[6]; order = 70;
                        }
                } else if (order == 7 && len == 8) { // Received {nr] and {ar} (part of authentication)
                                p_response = &responses[6]; order = 70;
                        }
                } else if (order == 7 && len == 8) { // Received {nr] and {ar} (part of authentication)

-                       if (tracing) {
-                               LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                       }

                        uint32_t nr = bytes_to_num(receivedCmd,4);
                        uint32_t ar = bytes_to_num(receivedCmd+4,4);
                        Dbprintf("Auth attempt {nr}{ar}: %08x %08x",nr,ar);
                        uint32_t nr = bytes_to_num(receivedCmd,4);
                        uint32_t ar = bytes_to_num(receivedCmd+4,4);
                        Dbprintf("Auth attempt {nr}{ar}: %08x %08x",nr,ar);


@@ -1189,9 +1181,6 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
 
                                default: {
                                        // Never seen this command before
 
                                default: {
                                        // Never seen this command before

-                                       if (tracing) {
-                                               LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       }

                                        Dbprintf("Received unknown command (len=%d):",len);
                                        Dbhexdump(len,receivedCmd,false);
                                        // Do not respond
                                        Dbprintf("Received unknown command (len=%d):",len);
                                        Dbhexdump(len,receivedCmd,false);
                                        // Do not respond


@@ -1209,9 +1198,6 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
         
                                if (prepare_tag_modulation(&dynamic_response_info,DYNAMIC_MODULATION_BUFFER_SIZE) == false) {
                                        Dbprintf("Error preparing tag response");
         
                                if (prepare_tag_modulation(&dynamic_response_info,DYNAMIC_MODULATION_BUFFER_SIZE) == false) {
                                        Dbprintf("Error preparing tag response");

-                                       if (tracing) {
-                                               LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       }

                                        break;
                                }
                                p_response = &dynamic_response_info;
                                        break;
                                }
                                p_response = &dynamic_response_info;


@@ -1231,21 +1217,7 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
                cmdsRecvd++;
 
                if (p_response != NULL) {
                cmdsRecvd++;
 
                if (p_response != NULL) {

-                       EmSendCmd14443aRaw(p_response->modulation, p_response->modulation_n, receivedCmd[0] == 0x52);
-                       // do the tracing for the previous reader request and this tag answer:
-                       uint8_t par[MAX_PARITY_SIZE];
-                       GetParity(p_response->response, p_response->response_n, par);
-       
-                       EmLogTrace(Uart.output, 
-                                               Uart.len, 
-                                               Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, 
-                                               Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, 
-                                               Uart.parity,
-                                               p_response->response, 
-                                               p_response->response_n,
-                                               LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_TAG,
-                                               (LastTimeProxToAirStart + p_response->ProxToAirDuration)*16 + DELAY_ARM2AIR_AS_TAG, 
-                                               par);
+                       EmSendPrecompiledCmd(p_response);

                }
                
                if (!tracing) {
                }
                
                if (!tracing) {


@@ -1262,7 +1234,7 @@ void SimulateIso14443aTag(int tagType, int uid_1st, int uid_2nd, byte_t* data)
 
 // prepare a delayed transfer. This simply shifts ToSend[] by a number
 // of bits specified in the delay parameter.
 
 // prepare a delayed transfer. This simply shifts ToSend[] by a number
 // of bits specified in the delay parameter.

-void PrepareDelayedTransfer(uint16_t delay)
+static void PrepareDelayedTransfer(uint16_t delay)

 {
        uint8_t bitmask = 0;
        uint8_t bits_to_shift = 0;
 {
        uint8_t bitmask = 0;
        uint8_t bits_to_shift = 0;


@@ -1288,7 +1260,7 @@ void PrepareDelayedTransfer(uint16_t delay)
 // Transmit the command (to the tag) that was placed in ToSend[].
 // Parameter timing:
 // if NULL: transfer at next possible time, taking into account
 // Transmit the command (to the tag) that was placed in ToSend[].
 // Parameter timing:
 // if NULL: transfer at next possible time, taking into account

-//                     request guard time and frame delay time
+//                     request guard time, startup frame guard time and frame delay time

 // if == 0:    transfer immediately and return time of transfer
 // if != 0: delay transfer until time specified
 //-------------------------------------------------------------------------------------
 // if == 0:    transfer immediately and return time of transfer
 // if != 0: delay transfer until time specified
 //-------------------------------------------------------------------------------------


@@ -1335,7 +1307,7 @@ static void TransmitFor14443a(const uint8_t *cmd, uint16_t len, uint32_t *timing
 //-----------------------------------------------------------------------------
 // Prepare reader command (in bits, support short frames) to send to FPGA
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 // Prepare reader command (in bits, support short frames) to send to FPGA
 //-----------------------------------------------------------------------------

-void CodeIso14443aBitsAsReaderPar(const uint8_t *cmd, uint16_t bits, const uint8_t *parity)
+static void CodeIso14443aBitsAsReaderPar(const uint8_t *cmd, uint16_t bits, const uint8_t *parity)

 {
        int i, j;
        int last;
 {
        int i, j;
        int last;


@@ -1413,21 +1385,13 @@ void CodeIso14443aBitsAsReaderPar(const uint8_t *cmd, uint16_t bits, const uint8
        ToSendMax++;
 }
 
        ToSendMax++;
 }
 

-//-----------------------------------------------------------------------------
-// Prepare reader command to send to FPGA
-//-----------------------------------------------------------------------------
-void CodeIso14443aAsReaderPar(const uint8_t *cmd, uint16_t len, const uint8_t *parity)
-{
-  CodeIso14443aBitsAsReaderPar(cmd, len*8, parity);
-}
-

 
 //-----------------------------------------------------------------------------
 // Wait for commands from reader
 // Stop when button is pressed (return 1) or field was gone (return 2)
 // Or return 0 when command is captured
 //-----------------------------------------------------------------------------
 
 //-----------------------------------------------------------------------------
 // Wait for commands from reader
 // Stop when button is pressed (return 1) or field was gone (return 2)
 // Or return 0 when command is captured
 //-----------------------------------------------------------------------------

-static int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity)
+int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity)

 {
        *len = 0;
 
 {
        *len = 0;
 


@@ -1435,40 +1399,45 @@ static int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity)
        int analogCnt = 0;
        int analogAVG = 0;
 
        int analogCnt = 0;
        int analogAVG = 0;
 

-       // 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();
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN);
-

        // Set ADC to read field strength
        AT91C_BASE_ADC->ADC_CR = AT91C_ADC_SWRST;
        AT91C_BASE_ADC->ADC_MR =
                                ADC_MODE_PRESCALE(63) |
                                ADC_MODE_STARTUP_TIME(1) |
                                ADC_MODE_SAMPLE_HOLD_TIME(15);
        // Set ADC to read field strength
        AT91C_BASE_ADC->ADC_CR = AT91C_ADC_SWRST;
        AT91C_BASE_ADC->ADC_MR =
                                ADC_MODE_PRESCALE(63) |
                                ADC_MODE_STARTUP_TIME(1) |
                                ADC_MODE_SAMPLE_HOLD_TIME(15);

-       AT91C_BASE_ADC->ADC_CHER = ADC_CHANNEL(ADC_CHAN_HF);
+       AT91C_BASE_ADC->ADC_CHER = ADC_CHANNEL(ADC_CHAN_HF_LOW);

        // start ADC
        AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START;
        
        // start ADC
        AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START;
        

-       // Now run a 'software UART' on the stream of incoming samples.
+       // Run a 'software UART' on the stream of incoming samples.

        UartInit(received, parity);
 
        UartInit(received, parity);
 

-       // Clear RXRDY:
-    uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
-       
+       // Ensure that the FPGA Delay Queue is empty before we switch to TAGSIM_LISTEN
+       do {
+               if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
+                       AT91C_BASE_SSC->SSC_THR = SEC_F;
+                       uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR; (void) b;
+               }
+       } while (GetCountSspClk() < LastTimeProxToAirStart + LastProxToAirDuration + (FpgaSendQueueDelay>>3));
+
+       // 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();
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN);
+

        for(;;) {
                WDT_HIT();
 
                if (BUTTON_PRESS()) return 1;
 
                // test if the field exists
        for(;;) {
                WDT_HIT();
 
                if (BUTTON_PRESS()) return 1;
 
                // test if the field exists

-               if (AT91C_BASE_ADC->ADC_SR & ADC_END_OF_CONVERSION(ADC_CHAN_HF)) {
+               if (AT91C_BASE_ADC->ADC_SR & ADC_END_OF_CONVERSION(ADC_CHAN_HF_LOW)) {

                        analogCnt++;
                        analogCnt++;

-                       analogAVG += AT91C_BASE_ADC->ADC_CDR[ADC_CHAN_HF];
+                       analogAVG += AT91C_BASE_ADC->ADC_CDR[ADC_CHAN_HF_LOW];

                        AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START;
                        if (analogCnt >= 32) {
                        AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START;
                        if (analogCnt >= 32) {

-                               if ((MAX_ADC_HF_VOLTAGE * (analogAVG / analogCnt) >> 10) < MF_MINFIELDV) {
+                               if ((MAX_ADC_HF_VOLTAGE_LOW * (analogAVG / analogCnt) >> 10) < MF_MINFIELDV) {

                                        vtime = GetTickCount();
                                        if (!timer) timer = vtime;
                                        // 50ms no field --> card to idle state
                                        vtime = GetTickCount();
                                        if (!timer) timer = vtime;
                                        // 50ms no field --> card to idle state


@@ -1482,9 +1451,10 @@ static int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity)
 
                // receive and test the miller decoding
         if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
 
                // receive and test the miller decoding
         if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {

-            b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
+            uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;

                        if(MillerDecoding(b, 0)) {
                                *len = Uart.len;
                        if(MillerDecoding(b, 0)) {
                                *len = Uart.len;

+                               EmLogTraceReader();

                                return 0;
                        }
         }
                                return 0;
                        }
         }


@@ -1493,19 +1463,27 @@ static int EmGetCmd(uint8_t *received, uint16_t *len, uint8_t *parity)
 }
 
 
 }
 
 

-static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNeeded)
+static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen)

 {
        uint8_t b;
        uint16_t i = 0;
 {
        uint8_t b;
        uint16_t i = 0;

-       uint32_t ThisTransferTime;
-       
+       bool correctionNeeded;
+

        // Modulate Manchester
        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_MOD);
 
        // include correction bit if necessary
        // Modulate Manchester
        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_MOD);
 
        // include correction bit if necessary

-       if (Uart.parityBits & 0x01) {
-               correctionNeeded = true;
+       if (Uart.bitCount == 7)
+       {
+               // Short tags (7 bits) don't have parity, determine the correct value from MSB
+               correctionNeeded = Uart.output[0] & 0x40;

        }
        }

+       else
+       {
+               // Look at the last parity bit
+               correctionNeeded = Uart.parity[(Uart.len-1)/8] & (0x80 >> ((Uart.len-1) & 7));
+       }
+

        if(correctionNeeded) {
                // 1236, so correction bit needed
                i = 0;
        if(correctionNeeded) {
                // 1236, so correction bit needed
                i = 0;


@@ -1525,10 +1503,7 @@ static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNe
                if (AT91C_BASE_SSC->SSC_RHR) break;
        }
 
                if (AT91C_BASE_SSC->SSC_RHR) break;
        }
 

-       while ((ThisTransferTime = GetCountSspClk()) & 0x00000007);
-
-       // Clear TXRDY:
-       AT91C_BASE_SSC->SSC_THR = SEC_F;
+       LastTimeProxToAirStart = (GetCountSspClk() & 0xfffffff8) + (correctionNeeded?8:0);

 
        // send cycle
        for(; i < respLen; ) {
 
        // send cycle
        for(; i < respLen; ) {


@@ -1542,97 +1517,60 @@ static int EmSendCmd14443aRaw(uint8_t *resp, uint16_t respLen, bool correctionNe
                }
        }
 
                }
        }
 

-       // Ensure that the FPGA Delay Queue is empty before we switch to TAGSIM_LISTEN again:
-       uint8_t fpga_queued_bits = FpgaSendQueueDelay >> 3;
-       for (i = 0; i <= fpga_queued_bits/8 + 1; ) {
-               if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
-                       AT91C_BASE_SSC->SSC_THR = SEC_F;
-                       FpgaSendQueueDelay = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
-                       i++;
-               }
-       }
-
-       LastTimeProxToAirStart = ThisTransferTime + (correctionNeeded?8:0);
-

        return 0;
 }
 
        return 0;
 }
 

-int EmSend4bitEx(uint8_t resp, bool correctionNeeded){
+
+static int EmSend4bitEx(uint8_t resp){

        Code4bitAnswerAsTag(resp);
        Code4bitAnswerAsTag(resp);

-       int res = EmSendCmd14443aRaw(ToSend, ToSendMax, correctionNeeded);
+       int res = EmSendCmd14443aRaw(ToSend, ToSendMax);

        // do the tracing for the previous reader request and this tag answer:
        // do the tracing for the previous reader request and this tag answer:

-       uint8_t par[1];
-       GetParity(&resp, 1, par);
-       EmLogTrace(Uart.output, 
-                               Uart.len, 
-                               Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, 
-                               Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, 
-                               Uart.parity,
-                               &resp, 
-                               1, 
-                               LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_TAG,
-                               (LastTimeProxToAirStart + LastProxToAirDuration)*16 + DELAY_ARM2AIR_AS_TAG, 
-                               par);
+       EmLogTraceTag(&resp, 1, NULL, LastProxToAirDuration);

        return res;
 }
 
        return res;
 }
 

+

 int EmSend4bit(uint8_t resp){
 int EmSend4bit(uint8_t resp){

-       return EmSend4bitEx(resp, false);
+       return EmSend4bitEx(resp);

 }
 
 }
 

-int EmSendCmdExPar(uint8_t *resp, uint16_t respLen, bool correctionNeeded, uint8_t *par){
+
+static int EmSendCmdExPar(uint8_t *resp, uint16_t respLen, uint8_t *par){

        CodeIso14443aAsTagPar(resp, respLen, par);
        CodeIso14443aAsTagPar(resp, respLen, par);

-       int res = EmSendCmd14443aRaw(ToSend, ToSendMax, correctionNeeded);
+       int res = EmSendCmd14443aRaw(ToSend, ToSendMax);

        // do the tracing for the previous reader request and this tag answer:
        // do the tracing for the previous reader request and this tag answer:

-       EmLogTrace(Uart.output, 
-                               Uart.len, 
-                               Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, 
-                               Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, 
-                               Uart.parity,
-                               resp, 
-                               respLen, 
-                               LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_TAG,
-                               (LastTimeProxToAirStart + LastProxToAirDuration)*16 + DELAY_ARM2AIR_AS_TAG, 
-                               par);
+       EmLogTraceTag(resp, respLen, par, LastProxToAirDuration);

        return res;
 }
 
        return res;
 }
 

-int EmSendCmdEx(uint8_t *resp, uint16_t respLen, bool correctionNeeded){
+
+int EmSendCmdEx(uint8_t *resp, uint16_t respLen){

        uint8_t par[MAX_PARITY_SIZE];
        GetParity(resp, respLen, par);
        uint8_t par[MAX_PARITY_SIZE];
        GetParity(resp, respLen, par);

-       return EmSendCmdExPar(resp, respLen, correctionNeeded, par);
+       return EmSendCmdExPar(resp, respLen, par);

 }
 
 }
 

+

 int EmSendCmd(uint8_t *resp, uint16_t respLen){
        uint8_t par[MAX_PARITY_SIZE];
        GetParity(resp, respLen, par);
 int EmSendCmd(uint8_t *resp, uint16_t respLen){
        uint8_t par[MAX_PARITY_SIZE];
        GetParity(resp, respLen, par);

-       return EmSendCmdExPar(resp, respLen, false, par);
+       return EmSendCmdExPar(resp, respLen, par);

 }
 
 }
 

+

 int EmSendCmdPar(uint8_t *resp, uint16_t respLen, uint8_t *par){
 int EmSendCmdPar(uint8_t *resp, uint16_t respLen, uint8_t *par){

-       return EmSendCmdExPar(resp, respLen, false, par);
+       return EmSendCmdExPar(resp, respLen, par);

 }
 
 }
 

-bool EmLogTrace(uint8_t *reader_data, uint16_t reader_len, uint32_t reader_StartTime, uint32_t reader_EndTime, uint8_t *reader_Parity,
-                                uint8_t *tag_data, uint16_t tag_len, uint32_t tag_StartTime, uint32_t tag_EndTime, uint8_t *tag_Parity)
-{
-       if (tracing) {
-               // we cannot exactly measure the end and start of a received command from reader. However we know that the delay from
-               // end of the received command to start of the tag's (simulated by us) answer is n*128+20 or n*128+84 resp.
-               // with n >= 9. The start of the tags answer can be measured and therefore the end of the received command be calculated:
-               uint16_t reader_modlen = reader_EndTime - reader_StartTime;
-               uint16_t approx_fdt = tag_StartTime - reader_EndTime;
-               uint16_t exact_fdt = (approx_fdt - 20 + 32)/64 * 64 + 20;
-               reader_EndTime = tag_StartTime - exact_fdt;
-               reader_StartTime = reader_EndTime - reader_modlen;
-               if (!LogTrace(reader_data, reader_len, reader_StartTime, reader_EndTime, reader_Parity, true)) {
-                       return false;
-               } else return(!LogTrace(tag_data, tag_len, tag_StartTime, tag_EndTime, tag_Parity, false));
-       } else {
-               return true;
-       }
+
+int EmSendPrecompiledCmd(tag_response_info_t *response_info) {
+       int ret = EmSendCmd14443aRaw(response_info->modulation, response_info->modulation_n);
+       // do the tracing for the previous reader request and this tag answer:
+       EmLogTraceTag(response_info->response, response_info->response_n, &(response_info->par), response_info->ProxToAirDuration);
+       return ret;

 }
 
 }
 

+

 //-----------------------------------------------------------------------------
 // Wait a certain time for tag response
 //  If a response is captured return true
 //-----------------------------------------------------------------------------
 // Wait a certain time for tag response
 //  If a response is captured return true


@@ -1693,7 +1631,7 @@ void ReaderTransmitPar(uint8_t* frame, uint16_t len, uint8_t *par, uint32_t *tim
 }
 
 
 }
 
 

-void ReaderTransmitBits(uint8_t* frame, uint16_t len, uint32_t *timing)
+static void ReaderTransmitBits(uint8_t* frame, uint16_t len, uint32_t *timing)

 {
   // Generate parity and redirect
   uint8_t par[MAX_PARITY_SIZE];
 {
   // Generate parity and redirect
   uint8_t par[MAX_PARITY_SIZE];


@@ -1710,7 +1648,8 @@ void ReaderTransmit(uint8_t* frame, uint16_t len, uint32_t *timing)
   ReaderTransmitBitsPar(frame, len*8, par, timing);
 }
 
   ReaderTransmitBitsPar(frame, len*8, par, timing);
 }
 

-int ReaderReceiveOffset(uint8_t* receivedAnswer, uint16_t offset, uint8_t *parity)
+
+static int ReaderReceiveOffset(uint8_t* receivedAnswer, uint16_t offset, uint8_t *parity)

 {
        if (!GetIso14443aAnswerFromTag(receivedAnswer, parity, offset)) return false;
        if (tracing) {
 {
        if (!GetIso14443aAnswerFromTag(receivedAnswer, parity, offset)) return false;
        if (tracing) {


@@ -1719,6 +1658,7 @@ int ReaderReceiveOffset(uint8_t* receivedAnswer, uint16_t offset, uint8_t *parit
        return Demod.len;
 }
 
        return Demod.len;
 }
 

+

 int ReaderReceive(uint8_t *receivedAnswer, uint8_t *parity)
 {
        if (!GetIso14443aAnswerFromTag(receivedAnswer, parity, 0)) return false;
 int ReaderReceive(uint8_t *receivedAnswer, uint8_t *parity)
 {
        if (!GetIso14443aAnswerFromTag(receivedAnswer, parity, 0)) return false;


@@ -1728,13 +1668,66 @@ int ReaderReceive(uint8_t *receivedAnswer, uint8_t *parity)
        return Demod.len;
 }
 
        return Demod.len;
 }
 

+
+static void iso14a_set_ATS_times(uint8_t *ats) {
+
+       uint8_t tb1;
+       uint8_t fwi, sfgi; 
+       uint32_t fwt, sfgt;
+       
+       if (ats[0] > 1) {                                                       // there is a format byte T0
+               if ((ats[1] & 0x20) == 0x20) {                  // there is an interface byte TB(1)
+                       if ((ats[1] & 0x10) == 0x10) {          // there is an interface byte TA(1) preceding TB(1)
+                               tb1 = ats[3];
+                       } else {
+                               tb1 = ats[2];
+                       }
+                       fwi = (tb1 & 0xf0) >> 4;                        // frame waiting time integer (FWI)
+                       if (fwi != 15) {
+                               fwt = 256 * 16 * (1 << fwi);    // frame waiting time (FWT) in 1/fc
+                               iso14a_set_timeout(fwt/(8*16));
+                       }
+                       sfgi = tb1 & 0x0f;                                      // startup frame guard time integer (SFGI)
+                       if (sfgi != 0 && sfgi != 15) {
+                               sfgt = 256 * 16 * (1 << sfgi);  // startup frame guard time (SFGT) in 1/fc
+                               NextTransferTime = MAX(NextTransferTime, Demod.endTime + (sfgt - DELAY_AIR2ARM_AS_READER - DELAY_ARM2AIR_AS_READER)/16);
+                       }
+               }
+       }
+}
+
+
+static int GetATQA(uint8_t *resp, uint8_t *resp_par) {
+
+#define WUPA_RETRY_TIMEOUT     10      // 10ms
+       uint8_t wupa[]       = { 0x52 };  // 0x26 - REQA  0x52 - WAKE-UP
+
+       uint32_t save_iso14a_timeout = iso14a_get_timeout();
+       iso14a_set_timeout(1236/(16*8)+1);              // response to WUPA is expected at exactly 1236/fc. No need to wait longer.
+       
+       uint32_t start_time = GetTickCount();
+       int len;
+       
+       // we may need several tries if we did send an unknown command or a wrong authentication before...
+       do {
+               // Broadcast for a card, WUPA (0x52) will force response from all cards in the field
+               ReaderTransmitBitsPar(wupa, 7, NULL, NULL);
+               // Receive the ATQA
+               len = ReaderReceive(resp, resp_par);
+       } while (len == 0 && GetTickCount() <= start_time + WUPA_RETRY_TIMEOUT);
+                       
+       iso14a_set_timeout(save_iso14a_timeout);
+       return len;
+}
+
+

 // performs iso14443a anticollision (optional) and card select procedure
 // fills the uid and cuid pointer unless NULL
 // fills the card info record unless NULL
 // if anticollision is false, then the UID must be provided in uid_ptr[] 
 // and num_cascades must be set (1: 4 Byte UID, 2: 7 Byte UID, 3: 10 Byte UID)
 // performs iso14443a anticollision (optional) and card select procedure
 // fills the uid and cuid pointer unless NULL
 // fills the card info record unless NULL
 // if anticollision is false, then the UID must be provided in uid_ptr[] 
 // and num_cascades must be set (1: 4 Byte UID, 2: 7 Byte UID, 3: 10 Byte UID)

-int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, uint32_t *cuid_ptr, bool anticollision, uint8_t num_cascades) {
-       uint8_t wupa[]       = { 0x52 };  // 0x26 - REQA  0x52 - WAKE-UP
+// requests ATS unless no_rats is true
+int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, uint32_t *cuid_ptr, bool anticollision, uint8_t num_cascades, bool no_rats) {

        uint8_t sel_all[]    = { 0x93,0x20 };
        uint8_t sel_uid[]    = { 0x93,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
        uint8_t rats[]       = { 0xE0,0x80,0x00,0x00 }; // FSD=256, FSDI=8, CID=0
        uint8_t sel_all[]    = { 0x93,0x20 };
        uint8_t sel_uid[]    = { 0x93,0x70,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
        uint8_t rats[]       = { 0xE0,0x80,0x00,0x00 }; // FSD=256, FSDI=8, CID=0


@@ -1747,16 +1740,19 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u
        int cascade_level = 0;
        int len;
 
        int cascade_level = 0;
        int len;
 

-       // Broadcast for a card, WUPA (0x52) will force response from all cards in the field
-    ReaderTransmitBitsPar(wupa, 7, NULL, NULL);
-       
-       // Receive the ATQA
-       if(!ReaderReceive(resp, resp_par)) return 0;
+       // init card struct
+       if(p_hi14a_card) {
+               p_hi14a_card->uidlen = 0;
+               memset(p_hi14a_card->uid, 0, 10);
+               p_hi14a_card->ats_len = 0;
+       }
+
+       if (!GetATQA(resp, resp_par)) {
+               return 0;
+       }

 
        if(p_hi14a_card) {
                memcpy(p_hi14a_card->atqa, resp, 2);
 
        if(p_hi14a_card) {
                memcpy(p_hi14a_card->atqa, resp, 2);

-               p_hi14a_card->uidlen = 0;
-               memset(p_hi14a_card->uid,0,10);

        }
 
        if (anticollision) {
        }
 
        if (anticollision) {


@@ -1862,37 +1858,38 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u
 
        if(p_hi14a_card) {
                p_hi14a_card->sak = sak;
 
        if(p_hi14a_card) {
                p_hi14a_card->sak = sak;

-               p_hi14a_card->ats_len = 0;

        }
 
        }
 

-       // non iso14443a compliant tag
+       // PICC compilant with iso14443a-4 ---> (SAK & 0x20 != 0)

        if( (sak & 0x20) == 0) return 2; 
 
        if( (sak & 0x20) == 0) return 2; 
 

-       // Request for answer to select
-       AppendCrc14443a(rats, 2);
-       ReaderTransmit(rats, sizeof(rats), NULL);
-
-       if (!(len = ReaderReceive(resp, resp_par))) return 0;
+       if (!no_rats) {
+               // Request for answer to select
+               AppendCrc14443a(rats, 2);
+               ReaderTransmit(rats, sizeof(rats), NULL);

 
 

-       
-       if(p_hi14a_card) {
-               memcpy(p_hi14a_card->ats, resp, sizeof(p_hi14a_card->ats));
-               p_hi14a_card->ats_len = len;
-       }
+               if (!(len = ReaderReceive(resp, resp_par))) return 0;

 
 

-       // reset the PCB block number
-       iso14_pcb_blocknum = 0;
+               if(p_hi14a_card) {
+                       memcpy(p_hi14a_card->ats, resp, len);
+                       p_hi14a_card->ats_len = len;
+               }

 
 

-       // set default timeout based on ATS
-       iso14a_set_ATS_timeout(resp);
+               // reset the PCB block number
+               iso14_pcb_blocknum = 0;

 
 

+               // set default timeout and delay next transfer based on ATS
+               iso14a_set_ATS_times(resp);
+               
+       }

        return 1;       
 }
 
        return 1;       
 }
 

+

 void iso14443a_setup(uint8_t fpga_minor_mode) {
        FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
        // Set up the synchronous serial port
 void iso14443a_setup(uint8_t fpga_minor_mode) {
        FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
        // Set up the synchronous serial port

-       FpgaSetupSsc();
+       FpgaSetupSsc(FPGA_MAJOR_MODE_HF_ISO14443A);

        // connect Demodulated Signal to ADC:
        SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
 
        // connect Demodulated Signal to ADC:
        SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
 


@@ -1911,37 +1908,108 @@ void iso14443a_setup(uint8_t fpga_minor_mode) {
        DemodReset();
        UartReset();
        NextTransferTime = 2*DELAY_ARM2AIR_AS_READER;
        DemodReset();
        UartReset();
        NextTransferTime = 2*DELAY_ARM2AIR_AS_READER;

-       iso14a_set_timeout(1050); // 10ms default
+       iso14a_set_timeout(1060); // 10ms default

 }
 
 }
 

-int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) {
+/* Peter Fillmore 2015
+Added card id field to the function
+ info from ISO14443A standard
+b1 = Block Number
+b2 = RFU (always 1)
+b3 = depends on block
+b4 = Card ID following if set to 1
+b5 = depends on block type
+b6 = depends on block type
+b7,b8 = block type.
+Coding of I-BLOCK:
+b8 b7 b6 b5 b4 b3 b2 b1
+0  0  0  x  x  x  1  x
+b5 = chaining bit
+Coding of R-block:
+b8 b7 b6 b5 b4 b3 b2 b1
+1  0  1  x  x  0  1  x
+b5 = ACK/NACK
+Coding of S-block:
+b8 b7 b6 b5 b4 b3 b2 b1
+1  1  x  x  x  0  1  0 
+b5,b6 = 00 - DESELECT
+        11 - WTX 
+*/    
+int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data, uint8_t *res) {

        uint8_t parity[MAX_PARITY_SIZE];
        uint8_t parity[MAX_PARITY_SIZE];

-       uint8_t real_cmd[cmd_len+4];
-       real_cmd[0] = 0x0a; //I-Block
-       // put block number into the PCB
-       real_cmd[0] |= iso14_pcb_blocknum;
-       real_cmd[1] = 0x00; //CID: 0 //FIXME: allow multiple selected cards
-       memcpy(real_cmd+2, cmd, cmd_len);
-       AppendCrc14443a(real_cmd,cmd_len+2);
+       uint8_t real_cmd[cmd_len + 4];
+       
+       if (cmd_len) {
+               // ISO 14443 APDU frame: PCB [CID] [NAD] APDU CRC PCB=0x02
+               real_cmd[0] = 0x02; // bnr,nad,cid,chn=0; i-block(0x00) 
+               // put block number into the PCB
+               real_cmd[0] |= iso14_pcb_blocknum;
+               memcpy(real_cmd + 1, cmd, cmd_len);
+       } else {
+               // R-block. ACK
+               real_cmd[0] = 0xA2; // r-block + ACK    
+               real_cmd[0] |= iso14_pcb_blocknum;
+       }
+       AppendCrc14443a(real_cmd, cmd_len + 1);

  
  

-       ReaderTransmit(real_cmd, cmd_len+4, NULL);
+       ReaderTransmit(real_cmd, cmd_len + 3, NULL);
+

        size_t len = ReaderReceive(data, parity);
        uint8_t *data_bytes = (uint8_t *) data;
        size_t len = ReaderReceive(data, parity);
        uint8_t *data_bytes = (uint8_t *) data;

-       if (!len)
+
+       if (!len) {

                return 0; //DATA LINK ERROR
                return 0; //DATA LINK ERROR

-       // if we received an I- or R(ACK)-Block with a block number equal to the
-       // current block number, toggle the current block number
-       else if (len >= 4 // PCB+CID+CRC = 4 bytes
+       } else{
+               // S-Block WTX 
+               while((data_bytes[0] & 0xF2) == 0xF2) {
+                       uint32_t save_iso14a_timeout = iso14a_get_timeout();
+                       // temporarily increase timeout
+                       iso14a_set_timeout(MAX((data_bytes[1] & 0x3f) * save_iso14a_timeout, MAX_ISO14A_TIMEOUT));
+                       // Transmit WTX back 
+                       // byte1 - WTXM [1..59]. command FWT=FWT*WTXM
+                       data_bytes[1] = data_bytes[1] & 0x3f; // 2 high bits mandatory set to 0b
+                       // now need to fix CRC.
+                       AppendCrc14443a(data_bytes, len - 2);
+                       // transmit S-Block
+                       ReaderTransmit(data_bytes, len, NULL);
+                       // retrieve the result again (with increased timeout) 
+                       len = ReaderReceive(data, parity);
+                       data_bytes = data;
+                       // restore timeout
+                       iso14a_set_timeout(save_iso14a_timeout);
+               }
+
+               // if we received an I- or R(ACK)-Block with a block number equal to the
+               // current block number, toggle the current block number
+               if (len >= 3 // PCB+CRC = 3 bytes

                 && ((data_bytes[0] & 0xC0) == 0 // I-Block
                     || (data_bytes[0] & 0xD0) == 0x80) // R-Block with ACK bit set to 0
                 && (data_bytes[0] & 0x01) == iso14_pcb_blocknum) // equal block numbers
                 && ((data_bytes[0] & 0xC0) == 0 // I-Block
                     || (data_bytes[0] & 0xD0) == 0x80) // R-Block with ACK bit set to 0
                 && (data_bytes[0] & 0x01) == iso14_pcb_blocknum) // equal block numbers

-       {
-               iso14_pcb_blocknum ^= 1;
-       }
+               {
+                       iso14_pcb_blocknum ^= 1;
+               }
+               
+               // if we received I-block with chaining we need to send ACK and receive another block of data
+               if (res)
+                       *res = data_bytes[0];

 
 

+               // crc check
+               if (len >= 3 && !CheckCrc14443(CRC_14443_A, data_bytes, len)) {
+                       return -1;
+               }
+               
+       }
+       
+       // cut frame byte
+       len -= 1;
+       // memmove(data_bytes, data_bytes + 1, len);
+       for (int i = 0; i < len; i++)
+               data_bytes[i] = data_bytes[i + 1];
+       

        return len;
 }
 
        return len;
 }
 

+

 //-----------------------------------------------------------------------------
 // Read an ISO 14443a tag. Send out commands and store answers.
 //
 //-----------------------------------------------------------------------------
 // Read an ISO 14443a tag. Send out commands and store answers.
 //


@@ -1954,25 +2022,36 @@ void ReaderIso14443a(UsbCommand *c)
        size_t lenbits = c->arg[1] >> 16;
        uint32_t timeout = c->arg[2];
        uint32_t arg0 = 0;
        size_t lenbits = c->arg[1] >> 16;
        uint32_t timeout = c->arg[2];
        uint32_t arg0 = 0;

-       byte_t buf[USB_CMD_DATA_SIZE];
+       byte_t buf[USB_CMD_DATA_SIZE] = {0};

        uint8_t par[MAX_PARITY_SIZE];
        uint8_t par[MAX_PARITY_SIZE];

+       bool cantSELECT = false;

   
   

-       if(param & ISO14A_CONNECT) {
+       set_tracing(true);
+       
+       if(param & ISO14A_CLEAR_TRACE) {

                clear_trace();
        }
 
                clear_trace();
        }
 

-       set_tracing(true);
-

        if(param & ISO14A_REQUEST_TRIGGER) {
                iso14a_set_trigger(true);
        }
 
        if(param & ISO14A_CONNECT) {
        if(param & ISO14A_REQUEST_TRIGGER) {
                iso14a_set_trigger(true);
        }
 
        if(param & ISO14A_CONNECT) {

+               LED_A_ON();

                iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
                if(!(param & ISO14A_NO_SELECT)) {
                        iso14a_card_select_t *card = (iso14a_card_select_t*)buf;
                iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
                if(!(param & ISO14A_NO_SELECT)) {
                        iso14a_card_select_t *card = (iso14a_card_select_t*)buf;

-                       arg0 = iso14443a_select_card(NULL, card, NULL, true, 0);
+                       arg0 = iso14443a_select_card(NULL, card, NULL, true, 0, param & ISO14A_NO_RATS);
+
+                       // if we cant select then we cant send data
+                       if (arg0 != 1 && arg0 != 2) {
+                               // 1 - all is OK with ATS, 2 - without ATS
+                               cantSELECT = true;
+                       }
+                       
+                       LED_B_ON();

                        cmd_send(CMD_ACK,arg0,card->uidlen,0,buf,sizeof(iso14a_card_select_t));
                        cmd_send(CMD_ACK,arg0,card->uidlen,0,buf,sizeof(iso14a_card_select_t));

+                       LED_B_OFF();

                }
        }
 
                }
        }
 


@@ -1980,12 +2059,15 @@ void ReaderIso14443a(UsbCommand *c)
                iso14a_set_timeout(timeout);
        }
 
                iso14a_set_timeout(timeout);
        }
 

-       if(param & ISO14A_APDU) {
-               arg0 = iso14_apdu(cmd, len, buf);
-               cmd_send(CMD_ACK,arg0,0,0,buf,sizeof(buf));
+       if(param & ISO14A_APDU && !cantSELECT) {
+               uint8_t res;
+               arg0 = iso14_apdu(cmd, len, buf, &res);
+               LED_B_ON();
+               cmd_send(CMD_ACK, arg0, res, 0, buf, sizeof(buf));
+               LED_B_OFF();

        }
 
        }
 

-       if(param & ISO14A_RAW) {
+       if(param & ISO14A_RAW && !cantSELECT) {

                if(param & ISO14A_APPEND_CRC) {
                        if(param & ISO14A_TOPAZMODE) {
                                AppendCrc14443b(cmd,len);
                if(param & ISO14A_APPEND_CRC) {
                        if(param & ISO14A_TOPAZMODE) {
                                AppendCrc14443b(cmd,len);


@@ -2021,7 +2103,10 @@ void ReaderIso14443a(UsbCommand *c)
                        }
                }
                arg0 = ReaderReceive(buf, par);
                        }
                }
                arg0 = ReaderReceive(buf, par);

+
+               LED_B_ON();

                cmd_send(CMD_ACK,arg0,0,0,buf,sizeof(buf));
                cmd_send(CMD_ACK,arg0,0,0,buf,sizeof(buf));

+               LED_B_OFF();

        }
 
        if(param & ISO14A_REQUEST_TRIGGER) {
        }
 
        if(param & ISO14A_REQUEST_TRIGGER) {


@@ -2040,7 +2125,7 @@ void ReaderIso14443a(UsbCommand *c)
 // Determine the distance between two nonces.
 // Assume that the difference is small, but we don't know which is first.
 // Therefore try in alternating directions.
 // Determine the distance between two nonces.
 // Assume that the difference is small, but we don't know which is first.
 // Therefore try in alternating directions.

-int32_t dist_nt(uint32_t nt1, uint32_t nt2) {
+static int32_t dist_nt(uint32_t nt1, uint32_t nt2) {

 
        uint16_t i;
        uint32_t nttmp1, nttmp2;
 
        uint16_t i;
        uint32_t nttmp1, nttmp2;


@@ -2077,9 +2162,7 @@ void ReaderMifare(bool first_try)
        uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
        uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 
        uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
        uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 

-       if (first_try) { 
-               iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
-       }
+       iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);

        
        // free eventually allocated BigBuf memory. We want all for tracing.
        BigBuf_free();
        
        // free eventually allocated BigBuf memory. We want all for tracing.
        BigBuf_free();


@@ -2087,9 +2170,9 @@ void ReaderMifare(bool first_try)
        clear_trace();
        set_tracing(true);
 
        clear_trace();
        set_tracing(true);
 

-       byte_t nt_diff = 0;
+       uint8_t nt_diff = 0;

        uint8_t par[1] = {0};   // maximum 8 Bytes to be sent here, 1 byte parity is therefore enough
        uint8_t par[1] = {0};   // maximum 8 Bytes to be sent here, 1 byte parity is therefore enough

-       static byte_t par_low = 0;
+       static uint8_t par_low = 0;

        bool led_on = true;
        uint8_t uid[10]  ={0};
        uint32_t cuid;
        bool led_on = true;
        uint8_t uid[10]  ={0};
        uint32_t cuid;


@@ -2097,11 +2180,11 @@ void ReaderMifare(bool first_try)
        uint32_t nt = 0;
        uint32_t previous_nt = 0;
        static uint32_t nt_attacked = 0;
        uint32_t nt = 0;
        uint32_t previous_nt = 0;
        static uint32_t nt_attacked = 0;

-       byte_t par_list[8] = {0x00};
-       byte_t ks_list[8] = {0x00};
+       uint8_t par_list[8] = {0x00};
+       uint8_t ks_list[8] = {0x00};

 
        #define PRNG_SEQUENCE_LENGTH  (1 << 16);
 
        #define PRNG_SEQUENCE_LENGTH  (1 << 16);

-       static uint32_t sync_time;
+       uint32_t sync_time = GetCountSspClk() & 0xfffffff8;

        static int32_t sync_cycles;
        int catch_up_cycles = 0;
        int last_catch_up = 0;
        static int32_t sync_cycles;
        int catch_up_cycles = 0;
        int last_catch_up = 0;


@@ -2111,10 +2194,9 @@ void ReaderMifare(bool first_try)
 
        if (first_try) { 
                mf_nr_ar3 = 0;
 
        if (first_try) { 
                mf_nr_ar3 = 0;

-               sync_time = GetCountSspClk() & 0xfffffff8;
+               par[0] = par_low = 0;

                sync_cycles = PRNG_SEQUENCE_LENGTH;                                                     // theory: Mifare Classic's random generator repeats every 2^16 cycles (and so do the tag nonces).
                nt_attacked = 0;
                sync_cycles = PRNG_SEQUENCE_LENGTH;                                                     // theory: Mifare Classic's random generator repeats every 2^16 cycles (and so do the tag nonces).
                nt_attacked = 0;

-               par[0] = 0;

        }
        else {
                // we were unsuccessful on a previous call. Try another READER nonce (first 3 parity bits remain the same)
        }
        else {
                // we were unsuccessful on a previous call. Try another READER nonce (first 3 parity bits remain the same)


@@ -2130,6 +2212,7 @@ void ReaderMifare(bool first_try)
 
        #define MAX_UNEXPECTED_RANDOM   4               // maximum number of unexpected (i.e. real) random numbers when trying to sync. Then give up.
        #define MAX_SYNC_TRIES                  32
 
        #define MAX_UNEXPECTED_RANDOM   4               // maximum number of unexpected (i.e. real) random numbers when trying to sync. Then give up.
        #define MAX_SYNC_TRIES                  32

+       #define SYNC_TIME_BUFFER                16              // if there is only SYNC_TIME_BUFFER left before next planned sync, wait for next PRNG cycle

        #define NUM_DEBUG_INFOS                 8               // per strategy
        #define MAX_STRATEGY                    3
        uint16_t unexpected_random = 0;
        #define NUM_DEBUG_INFOS                 8               // per strategy
        #define MAX_STRATEGY                    3
        uint16_t unexpected_random = 0;


@@ -2168,7 +2251,7 @@ void ReaderMifare(bool first_try)
                        SpinDelay(100);
                }
                
                        SpinDelay(100);
                }
                

-               if(!iso14443a_select_card(uid, NULL, &cuid, true, 0)) {
+               if(!iso14443a_select_card(uid, NULL, &cuid, true, 0, true)) {

                        if (MF_DBGLEVEL >= 1)   Dbprintf("Mifare: Can't select card");
                        continue;
                }
                        if (MF_DBGLEVEL >= 1)   Dbprintf("Mifare: Can't select card");
                        continue;
                }


@@ -2179,8 +2262,8 @@ void ReaderMifare(bool first_try)
                        sync_time = (sync_time & 0xfffffff8) + sync_cycles + catch_up_cycles;
                        catch_up_cycles = 0;
 
                        sync_time = (sync_time & 0xfffffff8) + sync_cycles + catch_up_cycles;
                        catch_up_cycles = 0;
 

-                       // if we missed the sync time already, advance to the next nonce repeat
-                       while(GetCountSspClk() > sync_time) {
+                       // if we missed the sync time already or are about to miss it, advance to the next nonce repeat
+                       while(sync_time < GetCountSspClk() + SYNC_TIME_BUFFER) {

                                elapsed_prng_sequences++;
                                sync_time = (sync_time & 0xfffffff8) + sync_cycles;
                        }
                                elapsed_prng_sequences++;
                                sync_time = (sync_time & 0xfffffff8) + sync_cycles;
                        }


@@ -2336,14 +2419,14 @@ void ReaderMifare(bool first_try)
                }
        }
        
                }
        }
        

-       byte_t buf[28];
+       uint8_t buf[32];

        memcpy(buf + 0,  uid, 4);
        num_to_bytes(nt, 4, buf + 4);
        memcpy(buf + 8,  par_list, 8);
        memcpy(buf + 16, ks_list, 8);
        memcpy(buf + 0,  uid, 4);
        num_to_bytes(nt, 4, buf + 4);
        memcpy(buf + 8,  par_list, 8);
        memcpy(buf + 16, ks_list, 8);

-       memcpy(buf + 24, mf_nr_ar, 4);
+       memcpy(buf + 24, mf_nr_ar, 8);

                
                

-       cmd_send(CMD_ACK, isOK, 0, 0, buf, 28);
+       cmd_send(CMD_ACK, isOK, 0, 0, buf, 32);

 
        // Thats it...
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
 
        // Thats it...
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);


@@ -2352,705 +2435,6 @@ void ReaderMifare(bool first_try)
        set_tracing(false);
 }
 
        set_tracing(false);
 }
 

-typedef struct {
-  uint32_t cuid;
-  uint8_t  sector;
-  uint8_t  keytype;
-  uint32_t nonce;
-  uint32_t ar;
-  uint32_t nr;
-  uint32_t nonce2;
-  uint32_t ar2;
-  uint32_t nr2;
-} nonces_t;
-
-/**
-  *MIFARE 1K simulate.
-  *
-  *@param flags :
-  *    FLAG_INTERACTIVE - In interactive mode, we are expected to finish the operation with an ACK
-  * FLAG_4B_UID_IN_DATA - means that there is a 4-byte UID in the data-section, we're expected to use that
-  * FLAG_7B_UID_IN_DATA - means that there is a 7-byte UID in the data-section, we're expected to use that
-  * FLAG_10B_UID_IN_DATA       - use 10-byte UID in the data-section not finished
-  *    FLAG_NR_AR_ATTACK  - means we should collect NR_AR responses for bruteforcing later
-  * FLAG_RANDOM_NONCE - means we should generate some pseudo-random nonce data (only allows moebius attack)
-  *@param exitAfterNReads, exit simulation after n blocks have been read, 0 is infinite ...
-  * (unless reader attack mode enabled then it runs util it gets enough nonces to recover all keys attmpted)
-  */
-void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *datain)
-{
-       int cardSTATE = MFEMUL_NOFIELD;
-       int _UID_LEN = 0; // 4, 7, 10
-       int vHf = 0;    // in mV
-       int res;
-       uint32_t selTimer = 0;
-       uint32_t authTimer = 0;
-       uint16_t len = 0;
-       uint8_t cardWRBL = 0;
-       uint8_t cardAUTHSC = 0;
-       uint8_t cardAUTHKEY = 0xff;  // no authentication
-       uint32_t cardRr = 0;
-       uint32_t cuid = 0;
-       //uint32_t rn_enc = 0;
-       uint32_t ans = 0;
-       uint32_t cardINTREG = 0;
-       uint8_t cardINTBLOCK = 0;
-       struct Crypto1State mpcs = {0, 0};
-       struct Crypto1State *pcs;
-       pcs = &mpcs;
-       uint32_t numReads = 0;//Counts numer of times reader read a block
-       uint8_t receivedCmd[MAX_MIFARE_FRAME_SIZE];
-       uint8_t receivedCmd_par[MAX_MIFARE_PARITY_SIZE];
-       uint8_t response[MAX_MIFARE_FRAME_SIZE];
-       uint8_t response_par[MAX_MIFARE_PARITY_SIZE];
-       
-       uint8_t rATQA[]    = {0x04, 0x00}; // Mifare classic 1k 4BUID
-       uint8_t rUIDBCC1[] = {0xde, 0xad, 0xbe, 0xaf, 0x62};
-       uint8_t rUIDBCC2[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; // !!!
-       uint8_t rUIDBCC3[] = {0xde, 0xad, 0xbe, 0xaf, 0x62};
-
-       uint8_t rSAKfinal[]= {0x08, 0xb6, 0xdd};      // mifare 1k indicated
-       uint8_t rSAK1[]    = {0x04, 0xda, 0x17};      // indicate UID not finished
-
-       uint8_t rAUTH_NT[] = {0x01, 0x02, 0x03, 0x04};
-       uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00};
-               
-       //Here, we collect UID,sector,keytype,NT,AR,NR,NT2,AR2,NR2
-       // This will be used in the reader-only attack.
-
-       //allow collecting up to 7 sets of nonces to allow recovery of up to 7 keys
-       #define ATTACK_KEY_COUNT 7 // keep same as define in cmdhfmf.c -> readerAttack() (Cannot be more than 7)
-       nonces_t ar_nr_resp[ATTACK_KEY_COUNT*2]; //*2 for 2 separate attack types (nml, moebius)
-       memset(ar_nr_resp, 0x00, sizeof(ar_nr_resp));
-
-       uint8_t ar_nr_collected[ATTACK_KEY_COUNT*2]; //*2 for 2nd attack type (moebius)
-       memset(ar_nr_collected, 0x00, sizeof(ar_nr_collected));
-       uint8_t nonce1_count = 0;
-       uint8_t nonce2_count = 0;
-       uint8_t moebius_n_count = 0;
-       bool gettingMoebius = false;
-       uint8_t mM = 0; //moebius_modifier for collection storage
-
-       // Authenticate response - nonce
-       uint32_t nonce;
-       if (flags & FLAG_RANDOM_NONCE) {
-               nonce = prand();
-       } else {
-               nonce = bytes_to_num(rAUTH_NT, 4);
-       }
-       
-       //-- Determine the UID
-       // Can be set from emulator memory, incoming data
-       // and can be 7 or 4 bytes long
-       if (flags & FLAG_4B_UID_IN_DATA)
-       {
-               // 4B uid comes from data-portion of packet
-               memcpy(rUIDBCC1,datain,4);
-               rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
-               _UID_LEN = 4;
-       } else if (flags & FLAG_7B_UID_IN_DATA) {
-               // 7B uid comes from data-portion of packet
-               memcpy(&rUIDBCC1[1],datain,3);
-               memcpy(rUIDBCC2, datain+3, 4);
-               _UID_LEN = 7;
-       } else if (flags & FLAG_10B_UID_IN_DATA) {
-               memcpy(&rUIDBCC1[1], datain,   3);
-               memcpy(&rUIDBCC2[1], datain+3, 3);
-               memcpy( rUIDBCC3,    datain+6, 4);
-               _UID_LEN = 10;
-       } else {
-               // get UID from emul memory - guess at length
-               emlGetMemBt(receivedCmd, 7, 1);
-               if (receivedCmd[0] == 0x00) {      // ---------- 4BUID
-                       emlGetMemBt(rUIDBCC1, 0, 4);
-                       _UID_LEN = 4;
-               } else {                           // ---------- 7BUID
-                       emlGetMemBt(&rUIDBCC1[1], 0, 3);
-                       emlGetMemBt(rUIDBCC2, 3, 4);
-                       _UID_LEN = 7;
-               }
-       }
-
-       switch (_UID_LEN) {
-               case 4:
-                       // save CUID
-                       cuid = bytes_to_num(rUIDBCC1, 4);
-                       // BCC
-                       rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
-                       if (MF_DBGLEVEL >= 2)   {
-                               Dbprintf("4B UID: %02x%02x%02x%02x", 
-                                       rUIDBCC1[0],
-                                       rUIDBCC1[1],
-                                       rUIDBCC1[2],
-                                       rUIDBCC1[3]
-                               );
-                       }
-                       break;
-               case 7:
-                       rATQA[0] |= 0x40;
-                       // save CUID
-                       cuid = bytes_to_num(rUIDBCC2, 4);
-                        // CascadeTag, CT
-                       rUIDBCC1[0] = 0x88;
-                       // BCC
-                       rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3]; 
-                       rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3]; 
-                       if (MF_DBGLEVEL >= 2)   {
-                               Dbprintf("7B UID: %02x %02x %02x %02x %02x %02x %02x",
-                                       rUIDBCC1[1],
-                                       rUIDBCC1[2],
-                                       rUIDBCC1[3],
-                                       rUIDBCC2[0],
-                                       rUIDBCC2[1],
-                                       rUIDBCC2[2],
-                                       rUIDBCC2[3]
-                               );
-                       }
-                       break;
-               case 10:
-                       rATQA[0] |= 0x80;
-                       //sak_10[0] &= 0xFB;                                    
-                       // save CUID
-                       cuid = bytes_to_num(rUIDBCC3, 4);
-                        // CascadeTag, CT
-                       rUIDBCC1[0] = 0x88;
-                       rUIDBCC2[0] = 0x88;
-                       // BCC
-                       rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
-                       rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3];
-                       rUIDBCC3[4] = rUIDBCC3[0] ^ rUIDBCC3[1] ^ rUIDBCC3[2] ^ rUIDBCC3[3];
-
-                       if (MF_DBGLEVEL >= 2)   {
-                               Dbprintf("10B UID: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
-                                       rUIDBCC1[1],
-                                       rUIDBCC1[2],
-                                       rUIDBCC1[3],
-                                       rUIDBCC2[1],
-                                       rUIDBCC2[2],
-                                       rUIDBCC2[3],
-                                       rUIDBCC3[0],
-                                       rUIDBCC3[1],
-                                       rUIDBCC3[2],
-                                       rUIDBCC3[3]
-                               );
-                       }
-                       break;
-               default: 
-                       break;
-       }
-
-       // We need to listen to the high-frequency, peak-detected path.
-       iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
-
-       // free eventually allocated BigBuf memory but keep Emulator Memory
-       BigBuf_free_keep_EM();
-
-       // clear trace
-       clear_trace();
-       set_tracing(true);
-
-       bool finished = false;
-       bool button_pushed = BUTTON_PRESS();
-       while (!button_pushed && !finished && !usb_poll_validate_length()) {
-               WDT_HIT();
-
-               // find reader field
-               if (cardSTATE == MFEMUL_NOFIELD) {
-                       vHf = (MAX_ADC_HF_VOLTAGE * AvgAdc(ADC_CHAN_HF)) >> 10;
-                       if (vHf > MF_MINFIELDV) {
-                               cardSTATE_TO_IDLE();
-                               LED_A_ON();
-                       }
-               }
-               if (cardSTATE == MFEMUL_NOFIELD) continue;
-
-               //Now, get data
-               res = EmGetCmd(receivedCmd, &len, receivedCmd_par);
-               if (res == 2) { //Field is off!
-                       cardSTATE = MFEMUL_NOFIELD;
-                       LEDsoff();
-                       continue;
-               } else if (res == 1) {
-                       break;  //return value 1 means button press
-               }
-
-               // REQ or WUP request in ANY state and WUP in HALTED state
-               if (len == 1 && ((receivedCmd[0] == ISO14443A_CMD_REQA && cardSTATE != MFEMUL_HALTED) || receivedCmd[0] == ISO14443A_CMD_WUPA)) {
-                       selTimer = GetTickCount();
-                       EmSendCmdEx(rATQA, sizeof(rATQA), (receivedCmd[0] == ISO14443A_CMD_WUPA));
-                       cardSTATE = MFEMUL_SELECT1;
-
-                       // init crypto block
-                       LED_B_OFF();
-                       LED_C_OFF();
-                       crypto1_destroy(pcs);
-                       cardAUTHKEY = 0xff;
-                       if (flags & FLAG_RANDOM_NONCE) {
-                               nonce = prand();
-                       }
-                       continue;
-               }
-               
-               switch (cardSTATE) {
-                       case MFEMUL_NOFIELD:
-                       case MFEMUL_HALTED:
-                       case MFEMUL_IDLE:{
-                               LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                               break;
-                       }
-                       case MFEMUL_SELECT1:{
-                               // select all - 0x93 0x20
-                               if (len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && receivedCmd[1] == 0x20)) {
-                                       if (MF_DBGLEVEL >= 4)   Dbprintf("SELECT ALL received");
-                                       EmSendCmd(rUIDBCC1, sizeof(rUIDBCC1));
-                                       break;
-                               }
-
-                               // select card - 0x93 0x70 ...
-                               if (len == 9 &&
-                                               (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], rUIDBCC1, 4) == 0)) {
-                                       if (MF_DBGLEVEL >= 4) 
-                                               Dbprintf("SELECT %02x%02x%02x%02x received",receivedCmd[2],receivedCmd[3],receivedCmd[4],receivedCmd[5]);
-                                       
-                                       switch(_UID_LEN) {
-                                               case 4:
-                                                       cardSTATE = MFEMUL_WORK;
-                                                       LED_B_ON();
-                                                       if (MF_DBGLEVEL >= 4)   Dbprintf("--> WORK. anticol1 time: %d", GetTickCount() - selTimer);
-                                                       EmSendCmd(rSAKfinal, sizeof(rSAKfinal));
-                                                       break;
-                                               case 7:
-                                                       cardSTATE       = MFEMUL_SELECT2;
-                                                       EmSendCmd(rSAK1, sizeof(rSAK1));
-                                                       break;
-                                               case 10:
-                                                       cardSTATE       = MFEMUL_SELECT2;
-                                                       EmSendCmd(rSAK1, sizeof(rSAK1));
-                                                       break;
-                                               default:break;
-                                       }
-                               } else {
-                                       cardSTATE_TO_IDLE();
-                               }
-                               break;
-                       }
-                       case MFEMUL_SELECT3:{
-                               if (!len) { 
-                                       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       break;
-                               }
-                               // select all cl3 - 0x97 0x20
-                               if (len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_3 && receivedCmd[1] == 0x20)) {
-                                       EmSendCmd(rUIDBCC3, sizeof(rUIDBCC3));
-                                       break;
-                               }
-                               // select card cl3 - 0x97 0x70
-                               if (len == 9 && 
-                                               (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_3 &&
-                                                receivedCmd[1] == 0x70 && 
-                                                memcmp(&receivedCmd[2], rUIDBCC3, 4) == 0) ) {
-
-                                       EmSendCmd(rSAKfinal, sizeof(rSAKfinal));
-                                       cardSTATE = MFEMUL_WORK;
-                                       LED_B_ON();
-                                       if (MF_DBGLEVEL >= 4)   Dbprintf("--> WORK. anticol3 time: %d", GetTickCount() - selTimer);
-                                       break;
-                               }
-                               cardSTATE_TO_IDLE();
-                               break;
-                       }
-                       case MFEMUL_AUTH1:{
-                               if( len != 8) {
-                                       cardSTATE_TO_IDLE();
-                                       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       break;
-                               }
-
-                               uint32_t nr = bytes_to_num(receivedCmd, 4);
-                               uint32_t ar = bytes_to_num(&receivedCmd[4], 4);
-       
-                               // Collect AR/NR per keytype & sector
-                               if(flags & FLAG_NR_AR_ATTACK) {
-                                       for (uint8_t i = 0; i < ATTACK_KEY_COUNT; i++) {
-                                               if ( ar_nr_collected[i+mM]==0 || ((cardAUTHSC == ar_nr_resp[i+mM].sector) && (cardAUTHKEY == ar_nr_resp[i+mM].keytype) && (ar_nr_collected[i+mM] > 0)) ) {
-                                                       // if first auth for sector, or matches sector and keytype of previous auth
-                                                       if (ar_nr_collected[i+mM] < 2) {
-                                                               // if we haven't already collected 2 nonces for this sector
-                                                               if (ar_nr_resp[ar_nr_collected[i+mM]].ar != ar) {
-                                                                       // Avoid duplicates... probably not necessary, ar should vary. 
-                                                                       if (ar_nr_collected[i+mM]==0) {
-                                                                               // first nonce collect
-                                                                               ar_nr_resp[i+mM].cuid = cuid;
-                                                                               ar_nr_resp[i+mM].sector = cardAUTHSC;
-                                                                               ar_nr_resp[i+mM].keytype = cardAUTHKEY;
-                                                                               ar_nr_resp[i+mM].nonce = nonce;
-                                                                               ar_nr_resp[i+mM].nr = nr;
-                                                                               ar_nr_resp[i+mM].ar = ar;
-                                                                               nonce1_count++;
-                                                                               // add this nonce to first moebius nonce
-                                                                               ar_nr_resp[i+ATTACK_KEY_COUNT].cuid = cuid;
-                                                                               ar_nr_resp[i+ATTACK_KEY_COUNT].sector = cardAUTHSC;
-                                                                               ar_nr_resp[i+ATTACK_KEY_COUNT].keytype = cardAUTHKEY;
-                                                                               ar_nr_resp[i+ATTACK_KEY_COUNT].nonce = nonce;
-                                                                               ar_nr_resp[i+ATTACK_KEY_COUNT].nr = nr;
-                                                                               ar_nr_resp[i+ATTACK_KEY_COUNT].ar = ar;
-                                                                               ar_nr_collected[i+ATTACK_KEY_COUNT]++;
-                                                                       } else { // second nonce collect (std and moebius)
-                                                                               ar_nr_resp[i+mM].nonce2 = nonce;
-                                                                               ar_nr_resp[i+mM].nr2 = nr;
-                                                                               ar_nr_resp[i+mM].ar2 = ar;
-                                                                               if (!gettingMoebius) {
-                                                                                       nonce2_count++;
-                                                                                       // check if this was the last second nonce we need for std attack
-                                                                                       if ( nonce2_count == nonce1_count ) {
-                                                                                               // done collecting std test switch to moebius
-                                                                                               // first finish incrementing last sample
-                                                                                               ar_nr_collected[i+mM]++; 
-                                                                                               // switch to moebius collection
-                                                                                               gettingMoebius = true;
-                                                                                               mM = ATTACK_KEY_COUNT;
-                                                                                               if (flags & FLAG_RANDOM_NONCE) {
-                                                                                                       nonce = prand();
-                                                                                               } else {
-                                                                                                       nonce = nonce*7;
-                                                                                               }
-                                                                                               break;
-                                                                                       }
-                                                                               } else {
-                                                                                       moebius_n_count++;
-                                                                                       // if we've collected all the nonces we need - finish.
-                                                                                       if (nonce1_count == moebius_n_count) finished = true;
-                                                                               }
-                                                                       }
-                                                                       ar_nr_collected[i+mM]++;
-                                                               }
-                                                       }
-                                                       // we found right spot for this nonce stop looking
-                                                       break;
-                                               }
-                                       }
-                               }
-
-                               // --- crypto
-                               crypto1_word(pcs, nr , 1);
-                               cardRr = ar ^ crypto1_word(pcs, 0, 0);
-
-                               // test if auth OK
-                               if (cardRr != prng_successor(nonce, 64)){
-                                       if (MF_DBGLEVEL >= 2) Dbprintf("AUTH FAILED for sector %d with key %c. cardRr=%08x, succ=%08x",
-                                                       cardAUTHSC, cardAUTHKEY == 0 ? 'A' : 'B',
-                                                       cardRr, prng_successor(nonce, 64));
-                                       // Shouldn't we respond anything here?
-                                       // Right now, we don't nack or anything, which causes the
-                                       // reader to do a WUPA after a while. /Martin
-                                       // -- which is the correct response. /piwi
-                                       cardSTATE_TO_IDLE();
-                                       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       break;
-                               }
-
-                               //auth successful
-                               ans = prng_successor(nonce, 96) ^ crypto1_word(pcs, 0, 0);
-
-                               num_to_bytes(ans, 4, rAUTH_AT);
-                               // --- crypto
-                               EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
-                               LED_C_ON();
-                               cardSTATE = MFEMUL_WORK;
-                               if (MF_DBGLEVEL >= 4)   Dbprintf("AUTH COMPLETED for sector %d with key %c. time=%d", 
-                                       cardAUTHSC, cardAUTHKEY == 0 ? 'A' : 'B',
-                                       GetTickCount() - authTimer);
-                               break;
-                       }
-                       case MFEMUL_SELECT2:{
-                               if (!len) { 
-                                       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       break;
-                               }       
-                               // select all cl2 - 0x95 0x20
-                               if (len == 2 && (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && receivedCmd[1] == 0x20)) {
-                                       EmSendCmd(rUIDBCC2, sizeof(rUIDBCC2));
-                                       break;
-                               }
-
-                               // select cl2 card - 0x95 0x70 xxxxxxxxxxxx
-                               if (len == 9 && 
-                                               (receivedCmd[0] == ISO14443A_CMD_ANTICOLL_OR_SELECT_2 && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], rUIDBCC2, 4) == 0)) {
-                                       switch(_UID_LEN) {
-                                               case 7:
-                                                       EmSendCmd(rSAKfinal, sizeof(rSAKfinal));
-                                                       cardSTATE = MFEMUL_WORK;
-                                                       LED_B_ON();
-                                                       if (MF_DBGLEVEL >= 4)   Dbprintf("--> WORK. anticol2 time: %d", GetTickCount() - selTimer);
-                                                       break;
-                                               case 10:
-                                                       EmSendCmd(rSAK1, sizeof(rSAK1));
-                                                       cardSTATE = MFEMUL_SELECT3;
-                                                       break;
-                                               default:break;
-                                       }
-                                       break;
-                               }
-                               
-                               // i guess there is a command). go into the work state.
-                               if (len != 4) {
-                                       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       break;
-                               }
-                               cardSTATE = MFEMUL_WORK;
-                               //goto lbWORK;
-                               //intentional fall-through to the next case-stmt
-                       }
-
-                       case MFEMUL_WORK:{
-                               if (len == 0) {
-                                       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       break;
-                               }
-                               
-                               bool encrypted_data = (cardAUTHKEY != 0xFF) ;
-
-                               if(encrypted_data) {
-                                       // decrypt seqence
-                                       mf_crypto1_decrypt(pcs, receivedCmd, len);
-                               }
-                               
-                               if (len == 4 && (receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61)) {
-
-                                       // if authenticating to a block that shouldn't exist - as long as we are not doing the reader attack
-                                       if (receivedCmd[1] >= 16 * 4 && !(flags & FLAG_NR_AR_ATTACK)) {
-                                               //is this the correct response to an auth on a out of range block? marshmellow
-                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate (0x%02x) on out of range block: %d (0x%02x), nacking",receivedCmd[0],receivedCmd[1],receivedCmd[1]);
-                                               break;
-                                       }
-
-                                       authTimer = GetTickCount();
-                                       cardAUTHSC = receivedCmd[1] / 4;  // received block num
-                                       cardAUTHKEY = receivedCmd[0] - 0x60;
-                                       crypto1_destroy(pcs);//Added by martin
-                                       crypto1_create(pcs, emlGetKey(cardAUTHSC, cardAUTHKEY));
-                                       //uint64_t key=emlGetKey(cardAUTHSC, cardAUTHKEY);
-                                       //Dbprintf("key: %04x%08x",(uint32_t)(key>>32)&0xFFFF,(uint32_t)(key&0xFFFFFFFF));
-
-                                       if (!encrypted_data) { // first authentication
-                                               if (MF_DBGLEVEL >= 4) Dbprintf("Reader authenticating for block %d (0x%02x) with key %d",receivedCmd[1] ,receivedCmd[1],cardAUTHKEY  );
-
-                                               crypto1_word(pcs, cuid ^ nonce, 0);//Update crypto state
-                                               num_to_bytes(nonce, 4, rAUTH_AT); // Send nonce
-                                       } else { // nested authentication
-                                               if (MF_DBGLEVEL >= 4) Dbprintf("Reader doing nested authentication for block %d (0x%02x) with key %d",receivedCmd[1] ,receivedCmd[1],cardAUTHKEY );
-                                               ans = nonce ^ crypto1_word(pcs, cuid ^ nonce, 0); 
-                                               num_to_bytes(ans, 4, rAUTH_AT);
-                                       }
-
-                                       EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
-                                       //Dbprintf("Sending rAUTH %02x%02x%02x%02x", rAUTH_AT[0],rAUTH_AT[1],rAUTH_AT[2],rAUTH_AT[3]);
-                                       cardSTATE = MFEMUL_AUTH1;
-                                       break;
-                               }
-                               
-                               // rule 13 of 7.5.3. in ISO 14443-4. chaining shall be continued
-                               // BUT... ACK --> NACK
-                               if (len == 1 && receivedCmd[0] == CARD_ACK) {
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                       break;
-                               }
-                               
-                               // rule 12 of 7.5.3. in ISO 14443-4. R(NAK) --> R(ACK)
-                               if (len == 1 && receivedCmd[0] == CARD_NACK_NA) {
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
-                                       break;
-                               }
-                               
-                               if(len != 4) {
-                                       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       break;
-                               }
-
-                               if(receivedCmd[0] == 0x30 // read block
-                                               || receivedCmd[0] == 0xA0 // write block
-                                               || receivedCmd[0] == 0xC0 // inc
-                                               || receivedCmd[0] == 0xC1 // dec
-                                               || receivedCmd[0] == 0xC2 // restore
-                                               || receivedCmd[0] == 0xB0) { // transfer
-                                       if (receivedCmd[1] >= 16 * 4) {
-                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate (0x%02x) on out of range block: %d (0x%02x), nacking",receivedCmd[0],receivedCmd[1],receivedCmd[1]);
-                                               break;
-                                       }
-
-                                       if (receivedCmd[1] / 4 != cardAUTHSC) {
-                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate (0x%02x) on block (0x%02x) not authenticated for (0x%02x), nacking",receivedCmd[0],receivedCmd[1],cardAUTHSC);
-                                               break;
-                                       }
-                               }
-                               // read block
-                               if (receivedCmd[0] == 0x30) {
-                                       if (MF_DBGLEVEL >= 4) {
-                                               Dbprintf("Reader reading block %d (0x%02x)",receivedCmd[1],receivedCmd[1]);
-                                       }
-                                       emlGetMem(response, receivedCmd[1], 1);
-                                       AppendCrc14443a(response, 16);
-                                       mf_crypto1_encrypt(pcs, response, 18, response_par);
-                                       EmSendCmdPar(response, 18, response_par);
-                                       numReads++;
-                                       if(exitAfterNReads > 0 && numReads == exitAfterNReads) {
-                                               Dbprintf("%d reads done, exiting", numReads);
-                                               finished = true;
-                                       }
-                                       break;
-                               }
-                               // write block
-                               if (receivedCmd[0] == 0xA0) {
-                                       if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0xA0 write block %d (%02x)",receivedCmd[1],receivedCmd[1]);
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
-                                       cardSTATE = MFEMUL_WRITEBL2;
-                                       cardWRBL = receivedCmd[1];
-                                       break;
-                               }
-                               // increment, decrement, restore
-                               if (receivedCmd[0] == 0xC0 || receivedCmd[0] == 0xC1 || receivedCmd[0] == 0xC2) {
-                                       if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0x%02x inc(0xC1)/dec(0xC0)/restore(0xC2) block %d (%02x)",receivedCmd[0],receivedCmd[1],receivedCmd[1]);
-                                       if (emlCheckValBl(receivedCmd[1])) {
-                                               if (MF_DBGLEVEL >= 2) Dbprintf("Reader tried to operate on block, but emlCheckValBl failed, nacking");
-                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                               break;
-                                       }
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
-                                       if (receivedCmd[0] == 0xC1)
-                                               cardSTATE = MFEMUL_INTREG_INC;
-                                       if (receivedCmd[0] == 0xC0)
-                                               cardSTATE = MFEMUL_INTREG_DEC;
-                                       if (receivedCmd[0] == 0xC2)
-                                               cardSTATE = MFEMUL_INTREG_REST;
-                                       cardWRBL = receivedCmd[1];
-                                       break;
-                               }
-                               // transfer
-                               if (receivedCmd[0] == 0xB0) {
-                                       if (MF_DBGLEVEL >= 4) Dbprintf("RECV 0x%02x transfer block %d (%02x)",receivedCmd[0],receivedCmd[1],receivedCmd[1]);
-                                       if (emlSetValBl(cardINTREG, cardINTBLOCK, receivedCmd[1]))
-                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                       else
-                                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
-                                       break;
-                               }
-                               // halt
-                               if (receivedCmd[0] == 0x50 && receivedCmd[1] == 0x00) {
-                                       LED_B_OFF();
-                                       LED_C_OFF();
-                                       cardSTATE = MFEMUL_HALTED;
-                                       if (MF_DBGLEVEL >= 4)   Dbprintf("--> HALTED. Selected time: %d ms",  GetTickCount() - selTimer);
-                                       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                                       break;
-                               }
-                               // RATS
-                               if (receivedCmd[0] == 0xe0) {//RATS
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                       break;
-                               }
-                               // command not allowed
-                               if (MF_DBGLEVEL >= 4)   Dbprintf("Received command not allowed, nacking");
-                               EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                               break;
-                       }
-                       case MFEMUL_WRITEBL2:{
-                               if (len == 18){
-                                       mf_crypto1_decrypt(pcs, receivedCmd, len);
-                                       emlSetMem(receivedCmd, cardWRBL, 1);
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
-                                       cardSTATE = MFEMUL_WORK;
-                               } else {
-                                       cardSTATE_TO_IDLE();
-                                       LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                               }
-                               break;
-                       }
-                       
-                       case MFEMUL_INTREG_INC:{
-                               mf_crypto1_decrypt(pcs, receivedCmd, len);
-                               memcpy(&ans, receivedCmd, 4);
-                               if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) {
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                       cardSTATE_TO_IDLE();
-                                       break;
-                               } 
-                               LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                               cardINTREG = cardINTREG + ans;
-                               cardSTATE = MFEMUL_WORK;
-                               break;
-                       }
-                       case MFEMUL_INTREG_DEC:{
-                               mf_crypto1_decrypt(pcs, receivedCmd, len);
-                               memcpy(&ans, receivedCmd, 4);
-                               if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) {
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                       cardSTATE_TO_IDLE();
-                                       break;
-                               }
-                               LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                               cardINTREG = cardINTREG - ans;
-                               cardSTATE = MFEMUL_WORK;
-                               break;
-                       }
-                       case MFEMUL_INTREG_REST:{
-                               mf_crypto1_decrypt(pcs, receivedCmd, len);
-                               memcpy(&ans, receivedCmd, 4);
-                               if (emlGetValBl(&cardINTREG, &cardINTBLOCK, cardWRBL)) {
-                                       EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
-                                       cardSTATE_TO_IDLE();
-                                       break;
-                               }
-                               LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, true);
-                               cardSTATE = MFEMUL_WORK;
-                               break;
-                       }
-               }
-               button_pushed = BUTTON_PRESS();
-       }
-
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       LEDsoff();
-
-       if(flags & FLAG_NR_AR_ATTACK && MF_DBGLEVEL >= 1) {
-               for ( uint8_t   i = 0; i < ATTACK_KEY_COUNT; i++) {
-                       if (ar_nr_collected[i] == 2) {
-                               Dbprintf("Collected two pairs of AR/NR which can be used to extract %s from reader for sector %d:", (i<ATTACK_KEY_COUNT/2) ? "keyA" : "keyB", ar_nr_resp[i].sector);
-                               Dbprintf("../tools/mfkey/mfkey32 %08x %08x %08x %08x %08x %08x",
-                                               ar_nr_resp[i].cuid,  //UID
-                                               ar_nr_resp[i].nonce, //NT
-                                               ar_nr_resp[i].nr,    //NR1
-                                               ar_nr_resp[i].ar,    //AR1
-                                               ar_nr_resp[i].nr2,   //NR2
-                                               ar_nr_resp[i].ar2    //AR2
-                                               );
-                       }
-               }       
-               for ( uint8_t   i = ATTACK_KEY_COUNT; i < ATTACK_KEY_COUNT*2; i++) {
-                       if (ar_nr_collected[i] == 2) {
-                               Dbprintf("Collected two pairs of AR/NR which can be used to extract %s from reader for sector %d:", (i<ATTACK_KEY_COUNT/2) ? "keyA" : "keyB", ar_nr_resp[i].sector);
-                               Dbprintf("../tools/mfkey/mfkey32v2 %08x %08x %08x %08x %08x %08x %08x",
-                                               ar_nr_resp[i].cuid,  //UID
-                                               ar_nr_resp[i].nonce, //NT
-                                               ar_nr_resp[i].nr,    //NR1
-                                               ar_nr_resp[i].ar,    //AR1
-                                               ar_nr_resp[i].nonce2,//NT2
-                                               ar_nr_resp[i].nr2,   //NR2
-                                               ar_nr_resp[i].ar2    //AR2
-                                               );
-                       }
-               }
-       }
-       if (MF_DBGLEVEL >= 1)   Dbprintf("Emulator stopped. Tracing: %d  trace length: %d ",    tracing, BigBuf_get_traceLen());
-
-       if(flags & FLAG_INTERACTIVE) { // Interactive mode flag, means we need to send ACK
-               //Send the collected ar_nr in the response
-               cmd_send(CMD_ACK,CMD_SIMULATE_MIFARE_CARD,button_pushed,0,&ar_nr_resp,sizeof(ar_nr_resp));
-       }
-}
-

 
 //-----------------------------------------------------------------------------
 // MIFARE sniffer. 
 
 //-----------------------------------------------------------------------------
 // MIFARE sniffer. 


@@ -3107,7 +2491,7 @@ void RAMFUNC SniffMifare(uint8_t param) {
        for(uint32_t sniffCounter = 0; true; ) {
        
                if(BUTTON_PRESS()) {
        for(uint32_t sniffCounter = 0; true; ) {
        
                if(BUTTON_PRESS()) {

-                       DbpString("cancelled by button");
+                       DbpString("Canceled by button.");

                        break;
                }
 
                        break;
                }
 


@@ -3164,7 +2548,9 @@ void RAMFUNC SniffMifare(uint8_t param) {
                        if(!TagIsActive) {              // no need to try decoding tag data if the reader is sending
                                uint8_t readerdata = (previous_data & 0xF0) | (*data >> 4);
                                if(MillerDecoding(readerdata, (sniffCounter-1)*4)) {
                        if(!TagIsActive) {              // no need to try decoding tag data if the reader is sending
                                uint8_t readerdata = (previous_data & 0xF0) | (*data >> 4);
                                if(MillerDecoding(readerdata, (sniffCounter-1)*4)) {

-                                       LED_C_INV();
+                                       LED_B_ON();
+                                       LED_C_OFF();
+

                                        if (MfSniffLogic(receivedCmd, Uart.len, Uart.parity, Uart.bitCount, true)) break;
 
                                        /* And ready to receive another command. */
                                        if (MfSniffLogic(receivedCmd, Uart.len, Uart.parity, Uart.bitCount, true)) break;
 
                                        /* And ready to receive another command. */


@@ -3179,7 +2565,8 @@ void RAMFUNC SniffMifare(uint8_t param) {
                        if(!ReaderIsActive) {           // no need to try decoding tag data if the reader is sending
                                uint8_t tagdata = (previous_data << 4) | (*data & 0x0F);
                                if(ManchesterDecoding(tagdata, 0, (sniffCounter-1)*4)) {
                        if(!ReaderIsActive) {           // no need to try decoding tag data if the reader is sending
                                uint8_t tagdata = (previous_data << 4) | (*data & 0x0F);
                                if(ManchesterDecoding(tagdata, 0, (sniffCounter-1)*4)) {

-                                       LED_C_INV();
+                                       LED_B_OFF();
+                                       LED_C_ON();

 
                                        if (MfSniffLogic(receivedResponse, Demod.len, Demod.parity, Demod.bitCount, false)) break;
 
 
                                        if (MfSniffLogic(receivedResponse, Demod.len, Demod.parity, Demod.bitCount, false)) break;
 


@@ -3201,7 +2588,7 @@ void RAMFUNC SniffMifare(uint8_t param) {
 
        } // main cycle
 
 
        } // main cycle
 

-       DbpString("COMMAND FINISHED");
+       DbpString("COMMAND FINISHED.");

 
        FpgaDisableSscDma();
        MfSniffEnd();
 
        FpgaDisableSscDma();
        MfSniffEnd();