Merge pull request #84 from marshmellow42/master

[proxmark3-svn] / client / cmdlfem4x.c

diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c
index 862f20bdcac74bc45251dab3ebb368f448912f7e..b915aa5aac5f62f63e7d35a70f6bd23a61cf78cd 100644 (file)
--- a/client/cmdlfem4x.c
+++ b/client/cmdlfem4x.c
@@ -11,17 +11,28 @@
 #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 "proxmark3.h"
 #include "ui.h"

+#include "util.h"

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

+char *global_em410xId;

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

+int CmdEMdemodASK(const char *Cmd)
+{
+       char cmdp = param_getchar(Cmd, 0);
+       int findone = (cmdp == '1') ? 1 : 0;    
+  UsbCommand c={CMD_EM410X_DEMOD};
+  c.arg[0]=findone;
+  SendCommand(&c);
+  return 0;
+}
+

 /* Read the ID of an EM410x tag.
  * Format:
  *   1111 1111 1           <-- standard non-repeatable header
 /* Read the ID of an EM410x tag.
  * Format:
  *   1111 1111 1           <-- standard non-repeatable header


@@ -32,159 +43,45 @@ static int CmdHelp(const char *Cmd);
  */
 int CmdEM410xRead(const char *Cmd)
 {
  */
 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 retested = 0;
-  uint8_t BitStream[MAX_GRAPH_TRACE_LEN];
-  high = low = 0;
-
-  /* Detect high and lows and clock */
-  for (i = 0; i < GraphTraceLen; i++)
-  {
-    if (GraphBuffer[i] > high)
-      high = GraphBuffer[i];
-    else if (GraphBuffer[i] < low)
-      low = GraphBuffer[i];
-  }
-
-  /* get clock */
-  clock = GetClock(Cmd, high, 0);
-
-  /* parity for our 4 columns */
-  parity[0] = parity[1] = parity[2] = parity[3] = 0;
-  header = rows = 0;
-
-  /* manchester demodulate */
-  bit = bit2idx = 0;
-  for (i = 0; i < (int)(GraphTraceLen / clock); i++)
-  {
-    hithigh = 0;
-    hitlow = 0;
-    first = 1;
-
-    /* Find out if we hit both high and low peaks */
-    for (j = 0; j < clock; j++)
-    {
-      if (GraphBuffer[(i * clock) + j] == high)
-        hithigh = 1;
-      else if (GraphBuffer[(i * clock) + j] == low)
-        hitlow = 1;
-
-      /* it doesn't count if it's the first part of our read
-       because it's really just trailing from the last sequence */
-      if (first && (hithigh || hitlow))
-        hithigh = hitlow = 0;
-      else
-        first = 0;
-
-      if (hithigh && hitlow)
-        break;
-    }
-
-    /* If we didn't hit both high and low peaks, we had a bit transition */
-    if (!hithigh || !hitlow)
-      bit ^= 1;
-
-    BitStream[bit2idx++] = bit;
-  }
-
-retest:
-  /* We go till 5 before the graph ends because we'll get that far below */
-  for (i = 1; i < bit2idx - 5; i++)
-  {
-    /* Step 2: We have our header but need our tag ID */
-    if (header == 9 && rows < 10)
-    {
-      /* Confirm parity is correct */
-      if ((BitStream[i] ^ BitStream[i+1] ^ BitStream[i+2] ^ BitStream[i+3]) == BitStream[i+4])
-      {
-        /* Read another byte! */
-        sprintf(id+rows, "%x", (8 * BitStream[i]) + (4 * BitStream[i+1]) + (2 * BitStream[i+2]) + (1 * BitStream[i+3]));
-        rows++;
-
-        /* Keep parity info */
-        parity[0] ^= BitStream[i];
-        parity[1] ^= BitStream[i+1];
-        parity[2] ^= BitStream[i+2];
-        parity[3] ^= BitStream[i+3];
-
-        /* Move 4 bits ahead */
-        i += 4;
-      }
-
-      /* Damn, something wrong! reset */
-      else
-      {
-        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;
-
-        rows = header = 0;
-      }
-    }
-
-    /* Step 3: Got our 40 bits! confirm column parity */
-    else if (rows == 10)
-    {
-      /* We need to make sure our 4 bits of parity are correct and we have a stop bit */
-      if (BitStream[i] == parity[0] && BitStream[i+1] == parity[1] &&
-        BitStream[i+2] == parity[2] && BitStream[i+3] == parity[3] &&
-        BitStream[i+4] == 0)
-      {
-        /* Sweet! */
-        PrintAndLog("EM410x Tag ID: %s", id);
-
-        /* Stop any loops */
-        return 1;
-      }
-
-      /* Crap! Incorrect parity or no stop bit, start all over */
-      else
-      {
-        rows = header = 0;
-
-        /* Go back 59 bits (9 header bits + 10 rows at 4+1 parity) */
-        i -= 59;
-      }
-    }
-
-    /* Step 1: get our header */
-    else if (header < 9)
-    {
-      /* Need 9 consecutive 1's */
-      if (BitStream[i] == 1)
-        header++;
-
-      /* We don't have a header, not enough consecutive 1 bits */
-      else
-        header = 0;
-    }
-  }
-
-  /* if we've already retested after flipping bits, return */
-  if (retested++)
+  uint32_t hi=0;
+  uint64_t lo=0;
+
+  if(!AskEm410xDemod("", &hi, &lo)) return 0;
+  PrintAndLog("EM410x pattern found: ");
+  printEM410x(hi, lo);
+  if (hi){
+    PrintAndLog ("EM410x XL pattern found");

     return 0;
     return 0;

-
-  /* if this didn't work, try flipping bits */
-  for (i = 0; i < bit2idx; i++)
-    BitStream[i] ^= 1;
-
-  goto retest;
+  }
+  char id[12] = {0x00};
+  sprintf(id, "%010llx",lo);
+  
+  global_em410xId = id;
+  return 1;

 }
 
 }
 

-/* emulate an EM410X tag
- * Format:
- *   1111 1111 1           <-- standard non-repeatable header
- *   XXXX [row parity bit] <-- 10 rows of 5 bits for our 40 bit tag ID
- *   ....
- *   CCCC                  <-- each bit here is parity for the 10 bits above in corresponding column
- *   0                     <-- stop bit, end of tag
- */
+// emulate an EM410X tag

 int CmdEM410xSim(const char *Cmd)
 {
 int CmdEM410xSim(const char *Cmd)
 {

-  int i, n, j, h, binary[4], parity[4];
+       int i, n, j, binary[4], parity[4];
+
+       char cmdp = param_getchar(Cmd, 0);
+       uint8_t uid[5] = {0x00};
+
+       if (cmdp == 'h' || cmdp == 'H') {
+               PrintAndLog("Usage:  lf em4x 410xsim <UID>");
+               PrintAndLog("");
+               PrintAndLog("     sample: lf em4x 410xsim 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;
 
   /* clock is 64 in EM410x tags */
   int clock = 64;


@@ -192,9 +89,6 @@ int CmdEM410xSim(const char *Cmd)
   /* clear our graph */
   ClearGraph(0);
 
   /* clear our graph */
   ClearGraph(0);
 

-  /* write it out a few times */
-  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);


@@ -231,35 +125,43 @@ int CmdEM410xSim(const char *Cmd)
     AppendGraph(0, clock, parity[3]);
 
     /* stop bit */
     AppendGraph(0, clock, parity[3]);
 
     /* stop bit */

-    AppendGraph(0, clock, 0);
-  }
-
-  /* modulate that biatch */
-  CmdManchesterMod("");
-
-  /* booyah! */
-  RepaintGraphWindow();
-  
-  CmdLFSim("");
+  AppendGraph(1, clock, 0);
+ 
+  CmdLFSim("0"); //240 start_gap.

   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)
 {

-  int read_h = (*Cmd == 'h');
-  do
-  {
-    CmdLFRead(read_h ? "h" : "");
-    // 2000 samples is OK for clock=64, but not clock=32.  Probably want
-               //   8000 for clock=16.  Don't want to go too high since old HID driver
-               //   is very slow
-               // TBD: Auto-grow sample size based on detected sample rate.  IE: If the
-               //   rate gets lower, then grow the number of samples
-               CmdSamples("4000");
-  } while ( ! CmdEM410xRead(""));
-  return 0;
+       do {
+               if (ukbhit()) {
+                       printf("\naborted via keyboard!\n");
+                       break;
+               }
+               
+               CmdLFRead("s");
+               getSamples("8192",true); //capture enough to get 2 full messages                
+       } while (!CmdEM410xRead(""));
+
+       return 0;
+}
+
+int CmdEM410xWatchnSpoof(const char *Cmd)
+{
+       CmdEM410xWatch(Cmd);
+       PrintAndLog("# Replaying captured ID: %s",global_em410xId);
+       CmdLFaskSim("");
+       return 0;

 }
 
 /* Read the transmitted data of an EM4x50 tag
 }
 
 /* Read the transmitted data of an EM4x50 tag


@@ -313,7 +215,7 @@ 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;


@@ -409,7 +311,7 @@ int CmdEM4x50Read(const char *Cmd)
 int CmdEM410xWrite(const char *Cmd)
 {
   uint64_t id = 0xFFFFFFFFFFFFFFFF; // invalid id value
 int CmdEM410xWrite(const char *Cmd)
 {
   uint64_t id = 0xFFFFFFFFFFFFFFFF; // invalid id value

-  unsigned int card = 0xFF; // invalid card value
+  int card = 0xFF; // invalid card value

        unsigned int clock = 0; // invalid clock value
 
        sscanf(Cmd, "%" PRIx64 " %d %d", &id, &card, &clock);
        unsigned int clock = 0; // invalid clock value
 
        sscanf(Cmd, "%" PRIx64 " %d %d", &id, &card, &clock);


@@ -476,12 +378,12 @@ int CmdEM410xWrite(const char *Cmd)
 
 int CmdReadWord(const char *Cmd)
 {
 
 int CmdReadWord(const char *Cmd)
 {

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

   UsbCommand c;
   
   sscanf(Cmd, "%d", &Word);
   
   UsbCommand c;
   
   sscanf(Cmd, "%d", &Word);
   

-  if (Word > 15) {
+       if ( (Word > 15) | (Word < 0) ) {

     PrintAndLog("Word must be between 0 and 15");
     return 1;
   }
     PrintAndLog("Word must be between 0 and 15");
     return 1;
   }


@@ -499,13 +401,13 @@ int CmdReadWord(const char *Cmd)
 
 int CmdReadWordPWD(const char *Cmd)
 {
 
 int CmdReadWordPWD(const char *Cmd)
 {

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

   int Password = 0xFFFFFFFF; //default to blank password
   UsbCommand c;
   
   sscanf(Cmd, "%d %x", &Word, &Password);
   
   int Password = 0xFFFFFFFF; //default to blank password
   UsbCommand c;
   
   sscanf(Cmd, "%d %x", &Word, &Password);
   

-  if (Word > 15) {
+       if ( (Word > 15) | (Word < 0) ) {

     PrintAndLog("Word must be between 0 and 15");
     return 1;
   }
     PrintAndLog("Word must be between 0 and 15");
     return 1;
   }


@@ -534,7 +436,7 @@ 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


@@ -547,7 +449,7 @@ 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;


@@ -559,7 +461,7 @@ 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


@@ -570,14 +472,14 @@ 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"},

+  {"em410xdemod", CmdEMdemodASK, 0, "[findone] -- Extract ID from EM410x tag (option 0 for continuous loop, 1 for only 1 tag)"},  

   {"em410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag"},
   {"em410xsim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x tag"},
   {"em410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"},
   {"em410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag"},
   {"em410xsim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x tag"},
   {"em410xwatch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"},

+  {"em410xspoof", CmdEM410xWatchnSpoof, 0, "['h'] --- Watches for EM410x 125/134 kHz tags, and replays them. (option 'h' for 134)" },

   {"em410xwrite", CmdEM410xWrite, 1, "<UID> <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"},
   {"em4x50read", CmdEM4x50Read, 1, "Extract data from EM4x50 tag"},
   {"readword", CmdReadWord, 1, "<Word> -- Read EM4xxx word data"},
   {"em410xwrite", CmdEM410xWrite, 1, "<UID> <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"},
   {"em4x50read", CmdEM4x50Read, 1, "Extract data from EM4x50 tag"},
   {"readword", CmdReadWord, 1, "<Word> -- Read EM4xxx word data"},