Updated tnp3.lua

[proxmark3-svn] / client / cmdlfem4x.c

diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c
index f823750b047192c94723110eb9e5fd679839d45f..07f909ac392ae272761ae9535b93a3cd99953044 100644 (file)
--- a/client/cmdlfem4x.c
+++ b/client/cmdlfem4x.c
@@ -1,4 +1,4 @@
-//-----------------------------------------------------------------------------
+ //-----------------------------------------------------------------------------

 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
 //
 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
 //
 // This code is licensed to you under the terms of the GNU GPL, version 2 or,


@@ -11,14 +11,20 @@
 #include <stdio.h>
 #include <string.h>
 #include <inttypes.h>
 #include <stdio.h>
 #include <string.h>
 #include <inttypes.h>

-//#include "proxusb.h"

 #include "proxmark3.h"
 #include "ui.h"
 #include "graph.h"
 #include "proxmark3.h"
 #include "ui.h"
 #include "graph.h"

+#include "cmdmain.h"

 #include "cmdparser.h"
 #include "cmddata.h"
 #include "cmdlf.h"
 #include "cmdlfem4x.h"
 #include "cmdparser.h"
 #include "cmddata.h"
 #include "cmdlf.h"
 #include "cmdlfem4x.h"

+#include "util.h"
+#include "data.h"
+#define LF_TRACE_BUFF_SIZE 12000
+#define LF_BITSSTREAM_LEN 1000
+
+char *global_em410xId;

 
 static int CmdHelp(const char *Cmd);
 
 
 static int CmdHelp(const char *Cmd);
 


@@ -35,6 +41,7 @@ int CmdEM410xRead(const char *Cmd)
   int i, j, clock, header, rows, bit, hithigh, hitlow, first, bit2idx, high, low;
   int parity[4];
   char id[11];
   int i, j, clock, header, rows, bit, hithigh, hitlow, first, bit2idx, high, low;
   int parity[4];
   char id[11];

+  char id2[11];

   int retested = 0;
   uint8_t BitStream[MAX_GRAPH_TRACE_LEN];
   high = low = 0;
   int retested = 0;
   uint8_t BitStream[MAX_GRAPH_TRACE_LEN];
   high = low = 0;


@@ -50,7 +57,7 @@ int CmdEM410xRead(const char *Cmd)
 
   /* get clock */
   clock = GetClock(Cmd, high, 0);
 
   /* get clock */
   clock = GetClock(Cmd, high, 0);

-
+   

   /* parity for our 4 columns */
   parity[0] = parity[1] = parity[2] = parity[3] = 0;
   header = rows = 0;
   /* parity for our 4 columns */
   parity[0] = parity[1] = parity[2] = parity[3] = 0;
   header = rows = 0;


@@ -91,7 +98,7 @@ int CmdEM410xRead(const char *Cmd)
 
 retest:
   /* We go till 5 before the graph ends because we'll get that far below */
 
 retest:
   /* We go till 5 before the graph ends because we'll get that far below */

-  for (i = 1; i < bit2idx - 5; i++)
+  for (i = 0; i < bit2idx - 5; i++)

   {
     /* Step 2: We have our header but need our tag ID */
     if (header == 9 && rows < 10)
   {
     /* Step 2: We have our header but need our tag ID */
     if (header == 9 && rows < 10)


@@ -101,6 +108,7 @@ retest:
       {
         /* Read another byte! */
         sprintf(id+rows, "%x", (8 * BitStream[i]) + (4 * BitStream[i+1]) + (2 * BitStream[i+2]) + (1 * BitStream[i+3]));
       {
         /* Read another byte! */
         sprintf(id+rows, "%x", (8 * BitStream[i]) + (4 * BitStream[i+1]) + (2 * BitStream[i+2]) + (1 * BitStream[i+3]));

+        sprintf(id2+rows, "%x", (8 * BitStream[i+3]) + (4 * BitStream[i+2]) + (2 * BitStream[i+1]) + (1 * BitStream[i]));

         rows++;
 
         /* Keep parity info */
         rows++;
 
         /* Keep parity info */


@@ -119,7 +127,7 @@ retest:
         PrintAndLog("Thought we had a valid tag but failed at word %d (i=%d)", rows + 1, i);
 
         /* Start back rows * 5 + 9 header bits, -1 to not start at same place */
         PrintAndLog("Thought we had a valid tag but failed at word %d (i=%d)", rows + 1, i);
 
         /* Start back rows * 5 + 9 header bits, -1 to not start at same place */

-        i -= 9 + (5 * rows) - 5;
+        i -= 9 + (5 * rows) -5;

 
         rows = header = 0;
       }
 
         rows = header = 0;
       }


@@ -135,7 +143,10 @@ retest:
       {
         /* Sweet! */
         PrintAndLog("EM410x Tag ID: %s", id);
       {
         /* Sweet! */
         PrintAndLog("EM410x Tag ID: %s", id);

+        PrintAndLog("Unique Tag ID: %s", id2);

 
 

+               global_em410xId = id;
+               

         /* Stop any loops */
         return 1;
       }
         /* Stop any loops */
         return 1;
       }


@@ -164,8 +175,9 @@ retest:
   }
 
   /* if we've already retested after flipping bits, return */
   }
 
   /* if we've already retested after flipping bits, return */

-  if (retested++)
+  if (retested++){

     return 0;
     return 0;

+       }

 
   /* if this didn't work, try flipping bits */
   for (i = 0; i < bit2idx; i++)
 
   /* if this didn't work, try flipping bits */
   for (i = 0; i < bit2idx; i++)


@@ -183,18 +195,36 @@ retest:
  *   0                     <-- stop bit, end of tag
  */
 int CmdEM410xSim(const char *Cmd)
  *   0                     <-- stop bit, end of tag
  */
 int CmdEM410xSim(const char *Cmd)

-{
-  int i, n, j, h, binary[4], parity[4];
-
+{      
+       int i, n, j, h, binary[4], parity[4];
+
+       char cmdp = param_getchar(Cmd, 0);
+       uint8_t uid[5] = {0x00};
+
+       if (cmdp == 'h' || cmdp == 'H') {
+               PrintAndLog("Usage:  lf em4x sim <UID>");
+               PrintAndLog("");
+               PrintAndLog("     sample: lf em4x sim 0F0368568B");
+               return 0;
+       }
+
+       if (param_gethex(Cmd, 0, uid, 10)) {
+               PrintAndLog("UID must include 10 HEX symbols");
+               return 0;
+       }
+       
+       PrintAndLog("Starting simulating UID %02X%02X%02X%02X%02X", uid[0],uid[1],uid[2],uid[3],uid[4]);
+       PrintAndLog("Press pm3-button to about simulation");
+  

   /* clock is 64 in EM410x tags */
   int clock = 64;
 
   /* clear our graph */
   ClearGraph(0);
   /* clock is 64 in EM410x tags */
   int clock = 64;
 
   /* clear our graph */
   ClearGraph(0);

-
+  

   /* write it out a few times */
   /* write it out a few times */

-  for (h = 0; h < 4; h++)
-  {
+  //for (h = 0; h < 4; h++)
+  //{

     /* write 9 start bits */
     for (i = 0; i < 9; i++)
       AppendGraph(0, clock, 1);
     /* write 9 start bits */
     for (i = 0; i < 9; i++)
       AppendGraph(0, clock, 1);


@@ -232,10 +262,10 @@ int CmdEM410xSim(const char *Cmd)
 
     /* stop bit */
     AppendGraph(0, clock, 0);
 
     /* stop bit */
     AppendGraph(0, clock, 0);

-  }
+  //}

 
   /* modulate that biatch */
 
   /* modulate that biatch */

-  CmdManchesterMod("");
+  //CmdManchesterMod("64");

 
   /* booyah! */
   RepaintGraphWindow();
 
   /* booyah! */
   RepaintGraphWindow();


@@ -244,15 +274,40 @@ int CmdEM410xSim(const char *Cmd)
   return 0;
 }
 
   return 0;
 }
 

-/* Function is equivalent of loread + losamples + em410xread
- * looped until an EM410x tag is detected */
+/* Function is equivalent of lf read + data samples + em410xread
+ * looped until an EM410x tag is detected 
+ * 
+ * Why is CmdSamples("16000")?
+ *  TBD: Auto-grow sample size based on detected sample rate.  IE: If the
+ *       rate gets lower, then grow the number of samples
+ *  Changed by martin, 4000 x 4 = 16000, 
+ *  see http://www.proxmark.org/forum/viewtopic.php?pid=7235#p7235
+
+*/

 int CmdEM410xWatch(const char *Cmd)
 {
 int CmdEM410xWatch(const char *Cmd)
 {

-  do
-  {
-    CmdLFRead("");
-    CmdSamples("2000");
-  } while ( ! CmdEM410xRead(""));
+       int read_h = (*Cmd == 'h');
+       do
+       {
+               if (ukbhit()) {
+                       printf("\naborted via keyboard!\n");
+                       break;
+               }
+               
+               CmdLFRead(read_h ? "h" : "");
+               CmdSamples("6000");
+               
+       } while (
+               !CmdEM410xRead("") 
+       );
+       return 0;
+}
+
+int CmdEM410xWatchnSpoof(const char *Cmd)
+{
+       CmdEM410xWatch(Cmd);
+    PrintAndLog("# Replaying : %s",global_em410xId);
+    CmdEM410xSim(global_em410xId);

   return 0;
 }
 
   return 0;
 }
 


@@ -307,7 +362,7 @@ int CmdEM4x50Read(const char *Cmd)
       ++i;
     while ((GraphBuffer[i] > low) && (i<GraphTraceLen))
       ++i;
       ++i;
     while ((GraphBuffer[i] > low) && (i<GraphTraceLen))
       ++i;

-    if (j>(MAX_GRAPH_TRACE_LEN/64)) {
+    if (j>=(MAX_GRAPH_TRACE_LEN/64)) {

       break;
     }
     tmpbuff[j++]= i - start;
       break;
     }
     tmpbuff[j++]= i - start;


@@ -402,22 +457,66 @@ int CmdEM4x50Read(const char *Cmd)
 
 int CmdEM410xWrite(const char *Cmd)
 {
 
 int CmdEM410xWrite(const char *Cmd)
 {

-  uint64_t id = 0;
-  unsigned int card;
+  uint64_t id = 0xFFFFFFFFFFFFFFFF; // invalid id value
+  int card = 0xFF; // invalid card value
+       unsigned int clock = 0; // invalid clock value
+
+       sscanf(Cmd, "%" PRIx64 " %d %d", &id, &card, &clock);
+
+       // Check ID
+       if (id == 0xFFFFFFFFFFFFFFFF) {
+               PrintAndLog("Error! ID is required.\n");
+               return 0;
+       }
+       if (id >= 0x10000000000) {
+               PrintAndLog("Error! Given EM410x ID is longer than 40 bits.\n");
+               return 0;
+       }
+
+       // Check Card
+       if (card == 0xFF) {
+               PrintAndLog("Error! Card type required.\n");
+               return 0;
+       }
+       if (card < 0) {
+               PrintAndLog("Error! Bad card type selected.\n");
+               return 0;
+       }
+
+       // Check Clock
+       if (card == 1)
+       {
+               // Default: 64
+               if (clock == 0)
+                       clock = 64;
+
+               // Allowed clock rates: 16, 32 and 64
+               if ((clock != 16) && (clock != 32) && (clock != 64)) {
+                       PrintAndLog("Error! Clock rate %d not valid. Supported clock rates are 16, 32 and 64.\n", clock);
+                       return 0;
+               }
+       }
+       else if (clock != 0)
+       {
+               PrintAndLog("Error! Clock rate is only supported on T55x7 tags.\n");
+               return 0;
+       }
+
+       if (card == 1) {
+               PrintAndLog("Writing %s tag with UID 0x%010" PRIx64 " (clock rate: %d)", "T55x7", id, clock);
+               // NOTE: We really should pass the clock in as a separate argument, but to
+               //   provide for backwards-compatibility for older firmware, and to avoid
+               //   having to add another argument to CMD_EM410X_WRITE_TAG, we just store
+               //   the clock rate in bits 8-15 of the card value
+               card = (card & 0xFF) | (((uint64_t)clock << 8) & 0xFF00);
+       }
+       else if (card == 0)
+               PrintAndLog("Writing %s tag with UID 0x%010" PRIx64, "T5555", id, clock);
+       else {
+               PrintAndLog("Error! Bad card type selected.\n");
+               return 0;
+       }

 
 

-  sscanf(Cmd, "%" PRIx64 " %d", &id, &card);
-
-  if (id >= 0x10000000000) {
-    PrintAndLog("Error! Given EM410x ID is longer than 40 bits.\n");
-    return 0;
-  }
-
-  if (card > 1) {
-    PrintAndLog("Error! Bad card type selected.\n");
-    return 0;
-  }
-
-  PrintAndLog("Writing %s tag with UID 0x%010" PRIx64, card ? "T55x7":"T5555", id);

   UsbCommand c = {CMD_EM410X_WRITE_TAG, {card, (uint32_t)(id >> 32), (uint32_t)id}};
   SendCommand(&c);
 
   UsbCommand c = {CMD_EM410X_WRITE_TAG, {card, (uint32_t)(id >> 32), (uint32_t)id}};
   SendCommand(&c);
 


@@ -426,48 +525,80 @@ int CmdEM410xWrite(const char *Cmd)
 
 int CmdReadWord(const char *Cmd)
 {
 
 int CmdReadWord(const char *Cmd)
 {

-  int Word = 16; //default to invalid word
-  UsbCommand c;
+       int Word = -1; //default to invalid word
+       UsbCommand c;

   
   

-  sscanf(Cmd, "%d", &Word);
+       sscanf(Cmd, "%d", &Word);

   
   

-  if (Word > 15) {
-    PrintAndLog("Word must be between 0 and 15");
-    return 1;
-  }
+       if ( (Word > 15) | (Word < 0) ) {
+               PrintAndLog("Word must be between 0 and 15");
+               return 1;
+       }

   
   

-  PrintAndLog("Reading word %d", Word);
+       PrintAndLog("Reading word %d", Word);

   
   

-  c.cmd = CMD_EM4X_READ_WORD;
-  c.d.asBytes[0] = 0x0; //Normal mode
-  c.arg[0] = 0;
-  c.arg[1] = Word;
-  c.arg[2] = 0;
-  SendCommand(&c);
+       c.cmd = CMD_EM4X_READ_WORD;
+       c.d.asBytes[0] = 0x0; //Normal mode
+       c.arg[0] = 0;
+       c.arg[1] = Word;
+       c.arg[2] = 0;
+       SendCommand(&c);
+       WaitForResponse(CMD_ACK, NULL);
+
+       uint8_t data[LF_TRACE_BUFF_SIZE] = {0x00};
+
+       GetFromBigBuf(data,LF_TRACE_BUFF_SIZE,3560);  //3560 -- should be offset..
+       WaitForResponseTimeout(CMD_ACK,NULL, 1500);
+
+       for (int j = 0; j < LF_TRACE_BUFF_SIZE; j++) {
+               GraphBuffer[j] = ((int)data[j]);
+       }
+       GraphTraceLen = LF_TRACE_BUFF_SIZE;
+       
+       uint8_t bits[LF_BITSSTREAM_LEN] = {0x00};
+       uint8_t * bitstream = bits;
+       manchester_decode(GraphBuffer, LF_TRACE_BUFF_SIZE, bitstream,LF_BITSSTREAM_LEN);
+       RepaintGraphWindow();

   return 0;
 }
 
 int CmdReadWordPWD(const char *Cmd)
 {
   return 0;
 }
 
 int CmdReadWordPWD(const char *Cmd)
 {

-  int Word = 16; //default to invalid word
-  int Password = 0xFFFFFFFF; //default to blank password
-  UsbCommand c;
-  
-  sscanf(Cmd, "%d %x", &Word, &Password);
-  
-  if (Word > 15) {
-    PrintAndLog("Word must be between 0 and 15");
-    return 1;
-  }
-  
-  PrintAndLog("Reading word %d with password %08X", Word, Password);
+       int Word = -1; //default to invalid word
+       int Password = 0xFFFFFFFF; //default to blank password
+       UsbCommand c;
+
+       sscanf(Cmd, "%d %x", &Word, &Password);
+
+       if ( (Word > 15) | (Word < 0) ) {
+               PrintAndLog("Word must be between 0 and 15");
+               return 1;
+       }

   
   

-  c.cmd = CMD_EM4X_READ_WORD;
-  c.d.asBytes[0] = 0x1; //Password mode
-  c.arg[0] = 0;
-  c.arg[1] = Word;
-  c.arg[2] = Password;
-  SendCommand(&c);
+       PrintAndLog("Reading word %d with password %08X", Word, Password);
+
+       c.cmd = CMD_EM4X_READ_WORD;
+       c.d.asBytes[0] = 0x1; //Password mode
+       c.arg[0] = 0;
+       c.arg[1] = Word;
+       c.arg[2] = Password;
+       SendCommand(&c);
+       WaitForResponse(CMD_ACK, NULL);
+               
+       uint8_t data[LF_TRACE_BUFF_SIZE] = {0x00};
+
+       GetFromBigBuf(data,LF_TRACE_BUFF_SIZE,3560);  //3560 -- should be offset..
+       WaitForResponseTimeout(CMD_ACK,NULL, 1500);
+
+       for (int j = 0; j < LF_TRACE_BUFF_SIZE; j++) {
+               GraphBuffer[j] = ((int)data[j]);
+       }
+       GraphTraceLen = LF_TRACE_BUFF_SIZE;
+       
+       uint8_t bits[LF_BITSSTREAM_LEN] = {0x00};
+       uint8_t * bitstream = bits;     
+       manchester_decode(GraphBuffer, LF_TRACE_BUFF_SIZE, bitstream, LF_BITSSTREAM_LEN);
+       RepaintGraphWindow();

   return 0;
 }
 
   return 0;
 }
 


@@ -484,7 +615,7 @@ int CmdWriteWord(const char *Cmd)
     return 1;
   }
   
     return 1;
   }
   

-  PrintAndLog("Writting word %d with data %08X", Word, Data);
+  PrintAndLog("Writing word %d with data %08X", Word, Data);

   
   c.cmd = CMD_EM4X_WRITE_WORD;
   c.d.asBytes[0] = 0x0; //Normal mode
   
   c.cmd = CMD_EM4X_WRITE_WORD;
   c.d.asBytes[0] = 0x0; //Normal mode


@@ -497,7 +628,7 @@ int CmdWriteWord(const char *Cmd)
 
 int CmdWriteWordPWD(const char *Cmd)
 {
 
 int CmdWriteWordPWD(const char *Cmd)
 {

-  int Word = 8; //default to invalid word
+  int Word = 16; //default to invalid word

   int Data = 0xFFFFFFFF; //default to blank data
   int Password = 0xFFFFFFFF; //default to blank password
   UsbCommand c;
   int Data = 0xFFFFFFFF; //default to blank data
   int Password = 0xFFFFFFFF; //default to blank password
   UsbCommand c;


@@ -509,7 +640,7 @@ int CmdWriteWordPWD(const char *Cmd)
     return 1;
   }
   
     return 1;
   }
   

-  PrintAndLog("Writting word %d with data %08X and password %08X", Word, Data, Password);
+  PrintAndLog("Writing word %d with data %08X and password %08X", Word, Data, Password);

   
   c.cmd = CMD_EM4X_WRITE_WORD;
   c.d.asBytes[0] = 0x1; //Password mode
   
   c.cmd = CMD_EM4X_WRITE_WORD;
   c.d.asBytes[0] = 0x1; //Password mode


@@ -520,23 +651,283 @@ int CmdWriteWordPWD(const char *Cmd)
   return 0;
 }
 
   return 0;
 }
 

-
-

 static command_t CommandTable[] =
 {
   {"help", CmdHelp, 1, "This help"},
 static command_t CommandTable[] =
 {
   {"help", CmdHelp, 1, "This help"},

-  {"em410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag"},
-  {"em410xsim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x tag"},
-  {"em410xwatch", CmdEM410xWatch, 0, "Watches for EM410x tags"},
-  {"em410xwrite", CmdEM410xWrite, 1, "<UID> <'0' T5555> <'1' T55x7> -- Write EM410x UID to T5555(Q5) or T55x7 tag"},
-  {"em4x50read", CmdEM4x50Read, 1, "Extract data from EM4x50 tag"},
-  {"readword", CmdReadWord, 1, "<Word> -- Read EM4xxx word data"},
-  {"readwordPWD", CmdReadWordPWD, 1, "<Word> <Password> -- Read EM4xxx word data in password mode"},
-  {"writeword", CmdWriteWord, 1, "<Data> <Word> -- Write EM4xxx word data"},
-  {"writewordPWD", CmdWriteWordPWD, 1, "<Data> <Word> <Password> -- Write EM4xxx word data in password mode"},
+  
+  {"410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag"},
+  {"410xsim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x tag"},
+  {"replay",  MWRem4xReplay, 0, "Watches for tag and simulates manchester encoded em4x tag"},
+  {"410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"},
+  {"410xspoof", CmdEM410xWatchnSpoof, 0, "['h'] --- Watches for EM410x 125/134 kHz tags, and replays them. (option 'h' for 134)" },
+  {"410xwrite", CmdEM410xWrite, 1, "<UID> <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"},
+  {"4x50read", CmdEM4x50Read, 1, "Extract data from EM4x50 tag"},
+  {"rd", CmdReadWord, 1, "<Word 1-15> -- Read EM4xxx word data"},
+  {"rdpwd", CmdReadWordPWD, 1, "<Word 1-15> <Password> -- Read EM4xxx word data  in password mode "},
+  {"wr", CmdWriteWord, 1, "<Data> <Word 1-15> -- Write EM4xxx word data"},
+  {"wrpwd", CmdWriteWordPWD, 1, "<Data> <Word 1-15> <Password> -- Write EM4xxx word data in password mode"},

   {NULL, NULL, 0, NULL}
 };
 
   {NULL, NULL, 0, NULL}
 };
 

+
+//Confirms the parity of a bitstream as well as obtaining the data (TagID) from within the appropriate memory space.
+//Arguments:
+// Pointer to a string containing the desired bitsream
+// Pointer to a string that will receive the decoded tag ID
+// Length of the bitsream pointed at in the first argument, char* _strBitStream
+//Retuns:
+//1 Parity confirmed
+//0 Parity not confirmed
+int ConfirmEm410xTagParity( char* _strBitStream, char* pID, int LengthOfBitstream )
+{
+       int i = 0;
+       int rows = 0;
+       int Parity[4] = {0x00};
+       char ID[11] = {0x00};
+       int k = 0;
+       int BitStream[70] = {0x00};
+       int counter = 0;
+       //prepare variables
+       for ( i = 0; i <= LengthOfBitstream; i++)
+       {
+               if (_strBitStream[i] == '1')
+               {
+                       k =1;
+                       memcpy(&BitStream[i], &k,4);
+               }
+               else if (_strBitStream[i] == '0')
+               {
+                       k = 0;
+                       memcpy(&BitStream[i], &k,4);
+               }
+       }
+       while ( counter < 2 )
+       {
+               //set/reset variables and counters
+               memset(ID,0x00,sizeof(ID));
+               memset(Parity,0x00,sizeof(Parity));
+               rows = 0;
+               for ( i = 9; i <= LengthOfBitstream; i++)
+               {
+                       if ( rows < 10 )
+                       {
+                               if ((BitStream[i] ^ BitStream[i+1] ^ BitStream[i+2] ^ BitStream[i+3]) == BitStream[i+4])
+                               {
+                                       sprintf(ID+rows, "%x", (8 * BitStream[i]) + (4 * BitStream[i+1]) + (2 * BitStream[i+2]) + (1 * BitStream[i+3]));
+                                       rows++;
+                                       /* Keep parity info and move four bits ahead*/
+                                       Parity[0] ^= BitStream[i];
+                                       Parity[1] ^= BitStream[i+1];
+                                       Parity[2] ^= BitStream[i+2];
+                                       Parity[3] ^= BitStream[i+3];
+                                       i += 4;
+                               }
+                       }
+                       if ( rows == 10 )
+                       {
+                               if (    BitStream[i] == Parity[0] && BitStream[i+1] == Parity[1] &&
+                                       BitStream[i+2] == Parity[2] && BitStream[i+3] == Parity[3] &&
+                                       BitStream[i+4] == 0)
+                               {
+                                       memcpy(pID,ID,strlen(ID));
+                                       return 1;
+                               }
+                       }
+               }
+               printf("[PARITY ->]Failed. Flipping Bits, and rechecking parity for bitstream:\n[PARITY ->]");  
+               for (k = 0; k < LengthOfBitstream; k++)
+               {
+                       BitStream[k] ^= 1;
+                       printf("%i", BitStream[k]);
+               }
+               puts(" ");
+               counter++;
+       }
+       return 0;
+}
+//Reads and demodulates an em410x RFID tag. It further allows slight modification to the decoded bitstream
+//Once a suitable bitstream has been identified, and if needed, modified, it is replayed. Allowing emulation of the
+//"stolen" rfid tag.
+//No meaningful returns or arguments.
+int MWRem4xReplay(const char* Cmd)
+{
+       // //header traces
+       // static char ArrayTraceZero[] = { '0','0','0','0','0','0','0','0','0' };
+       // static char ArrayTraceOne[] =  { '1','1','1','1','1','1','1','1','1' };
+       // //local string variables
+       // char strClockRate[10] = {0x00};
+       // char strAnswer[4] = {0x00};
+       // char strTempBufferMini[2] = {0x00}; 
+       // //our outbound bit-stream
+       // char strSimulateBitStream[65] = {0x00};
+       // //integers
+       // int iClockRate = 0;
+       // int needle = 0;
+       // int j = 0;
+       // int iFirstHeaderOffset = 0x00000000;
+       // int numManchesterDemodBits=0;
+       // //boolean values
+       // bool bInverted = false;
+       // //pointers to strings. memory will be allocated.
+       // char* pstrInvertBitStream = 0x00000000;
+       // char* pTempBuffer = 0x00000000;
+       // char* pID = 0x00000000;
+       // char* strBitStreamBuffer = 0x00000000;
+               
+
+       // puts("###################################");
+       // puts("#### Em4x Replay                 ##");
+       // puts("#### R.A.M.           June 2013  ##");
+       // puts("###################################");
+       // //initialize
+       // CmdLFRead("");
+       // //Collect ourselves 10,000 samples
+       // CmdSamples("10000");
+       // puts("[->]preforming ASK demodulation\n");
+       // //demodulate ask
+       // Cmdaskdemod("0");
+       // iClockRate = DetectClock(0);
+       // sprintf(strClockRate, "%i\n",iClockRate);
+       // printf("[->]Detected ClockRate: %s\n", strClockRate);
+       
+       // //If detected clock rate is something completely unreasonable, dont go ahead
+       // if ( iClockRate < 0xFFFE )
+       // {  
+           // pTempBuffer = (char*)malloc(MAX_GRAPH_TRACE_LEN);
+           // if (pTempBuffer == 0x00000000)
+             // return 0;
+           // memset(pTempBuffer,0x00,MAX_GRAPH_TRACE_LEN);
+           // //Preform manchester de-modulation and display in a single line.
+           // numManchesterDemodBits = CmdManchesterDemod( strClockRate ); 
+           // //note: numManchesterDemodBits is set above in CmdManchesterDemod()
+           // if ( numManchesterDemodBits == 0 )
+             // return 0;
+           // strBitStreamBuffer = malloc(numManchesterDemodBits+1);
+           // if ( strBitStreamBuffer == 0x00000000 )
+               // return 0;
+           // memset(strBitStreamBuffer, 0x00, (numManchesterDemodBits+1));
+           // //fill strBitStreamBuffer with demodulated, string formatted bits.
+           // for ( j = 0; j <= numManchesterDemodBits; j++ )
+           // {
+               // sprintf(strTempBufferMini, "%i",BitStream[j]);
+               // strcat(strBitStreamBuffer,strTempBufferMini);
+           // }
+           // printf("[->]Demodulated Bitstream: \n%s\n", strBitStreamBuffer);
+           // //Reset counter and select most probable bit stream
+           // j = 0;
+               // while ( j < numManchesterDemodBits )
+               // {
+                   // memset(strSimulateBitStream,0x00,64);
+                   // //search for header of nine (9) 0's : 000000000 or nine (9) 1's : 1111 1111 1
+                       // if ( ( strncmp(strBitStreamBuffer+j, ArrayTraceZero, sizeof(ArrayTraceZero)) == 0 ) ||
+                           // ( strncmp(strBitStreamBuffer+j, ArrayTraceOne, sizeof(ArrayTraceOne)) == 0  ) )
+                       // {
+                               // iFirstHeaderOffset = j;
+                           // memcpy(strSimulateBitStream, strBitStreamBuffer+j,64);
+                           // printf("[->]Offset of Header");
+                               // if ( strncmp(strBitStreamBuffer+iFirstHeaderOffset, "0", 1) == 0 )
+                                       // printf("'%s'", ArrayTraceZero );
+                               // else
+                                       // printf("'%s'", ArrayTraceOne );
+                               // printf(": %i\nHighlighted string : %s\n",iFirstHeaderOffset,strSimulateBitStream);
+                           // //allow us to escape loop or choose another frame
+                           // puts("[<-]Are we happy with this sample? [Y]es/[N]o");
+                           // gets(strAnswer);
+                           // if ( ( strncmp(strAnswer,"y",1) == 0 )  || ( strncmp(strAnswer,"Y",1) == 0 ) )
+                           // {
+                                   // j = numManchesterDemodBits+1;
+                                   // break;
+                           // }
+                       // }
+                       // j++;
+               // }
+       // }
+       // else return 0;
+       
+       // //Do we want the buffer inverted?
+       // memset(strAnswer, 0x00, sizeof(strAnswer));
+       // printf("[<-]Do you wish to invert the highlighted bitstream? [Y]es/[N]o\n");
+       // gets(strAnswer);
+       // if ( ( strncmp("y", strAnswer,1) == 0 )  || ( strncmp("Y", strAnswer, 1 ) == 0 ) )
+       // {
+               // //allocate heap memory
+               // pstrInvertBitStream = (char*)malloc(numManchesterDemodBits);
+               // if ( pstrInvertBitStream != 0x00000000 )
+               // {
+                       // memset(pstrInvertBitStream,0x00,numManchesterDemodBits);
+                       // bInverted = true;
+                       // //Invert Bitstream
+                       // for ( needle = 0; needle <= numManchesterDemodBits; needle++ )
+                       // {
+                               // if (strSimulateBitStream[needle] == '0')
+                                       // strcat(pstrInvertBitStream,"1");
+                               // else if (strSimulateBitStream[needle] == '1')
+                                       // strcat(pstrInvertBitStream,"0");
+                       // }
+                       // printf("[->]Inverted bitstream: %s\n", pstrInvertBitStream);
+               // }
+       // }    
+    // //Confirm parity of selected string
+       // pID = (char*)malloc(11);
+       // if (pID != 0x00000000)
+       // {
+               // memset(pID, 0x00, 11);
+               // if (ConfirmEm410xTagParity(strSimulateBitStream,pID, 64) == 1)
+               // {
+                       // printf("[->]Parity confirmed for selected bitstream!\n");
+                       // printf("[->]Tag ID was detected as: [hex]:%s\n",pID );
+               // }
+               // else
+                       // printf("[->]Parity check failed for the selected bitstream!\n");     
+       // }
+       
+       // //Spoof
+       // memset(strAnswer, 0x00, sizeof(strAnswer));  
+       // printf("[<-]Do you wish to continue with the EM4x simulation? [Y]es/[N]o\n");
+       // gets(strAnswer);
+       // if ( ( strncmp(strAnswer,"y",1) == 0 )  || ( strncmp(strAnswer,"Y",1) == 0 ) )
+       // {
+               // strcat(pTempBuffer, strClockRate);
+               // strcat(pTempBuffer, " ");
+               // if (bInverted == true)
+                       // strcat(pTempBuffer,pstrInvertBitStream);
+               // if (bInverted == false)
+                       // strcat(pTempBuffer,strSimulateBitStream);
+               // //inform the user
+               // puts("[->]Starting simulation now: \n");
+               // //Simulate tag with prepared buffer.
+               // CmdLFSimManchester(pTempBuffer);
+       // }
+       // else if ( ( strcmp("n", strAnswer) == 0 )  || ( strcmp("N", strAnswer ) == 0 ) )
+               // printf("[->]Exiting procedure now...\n");
+       // else
+               // printf("[->]Erroneous selection\nExiting procedure now....\n");
+       
+       // //Clean up -- Exit function
+       // //clear memory, then release pointer.
+       // if ( pstrInvertBitStream != 0x00000000 )
+       // {
+           // memset(pstrInvertBitStream,0x00,numManchesterDemodBits);
+           // free(pstrInvertBitStream);
+       // }
+       // if ( pTempBuffer != 0x00000000 )
+       // {
+           // memset(pTempBuffer,0x00,MAX_GRAPH_TRACE_LEN);
+           // free(pTempBuffer);
+       // }
+       // if ( pID != 0x00000000 )
+       // {
+           // memset(pID,0x00,11);
+           // free(pID);
+       // }
+       // if ( strBitStreamBuffer != 0x00000000 )
+       // {
+           // memset(strBitStreamBuffer,0x00,numManchesterDemodBits);
+           // free(strBitStreamBuffer);
+       // }
+       return 0;
+}
+

 int CmdLFEM4X(const char *Cmd)
 {
   CmdsParse(CommandTable, Cmd);
 int CmdLFEM4X(const char *Cmd)
 {
   CmdsParse(CommandTable, Cmd);