FIX: @marshmellow found out that the CRC-8/Maxim was not always giving the right...

[proxmark3-svn] / client / cmdlfem4x.c

diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c
index f6f103bf2b6df3ed432114edc703ac9b6f3e415a..f6671bcdb27586eb376e147d9df30ed27cdaf17a 100644 (file)
--- a/client/cmdlfem4x.c
+++ b/client/cmdlfem4x.c
@@ -19,6 +19,7 @@
 #include "cmddata.h"
 #include "cmdlf.h"
 #include "cmdlfem4x.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);
 


@@ -60,13 +61,13 @@ int CmdEM410xRead(const char *Cmd)
   }
 
   /* get clock */
   }
 
   /* get clock */

-  clock = GetClock(Cmd, high, 0);
+  clock = GetAskClock(Cmd, false, false);

 
   /* 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;
 

-  /* manchester demodulate */
+  // manchester demodulate

   bit = bit2idx = 0;
   for (i = 0; i < (int)(GraphTraceLen / clock); i++)
   {
   bit = bit2idx = 0;
   for (i = 0; i < (int)(GraphTraceLen / clock); i++)
   {


@@ -77,9 +78,9 @@ int CmdEM410xRead(const char *Cmd)
     /* Find out if we hit both high and low peaks */
     for (j = 0; j < clock; j++)
     {
     /* Find out if we hit both high and low peaks */
     for (j = 0; j < clock; j++)
     {

-      if (GraphBuffer[(i * clock) + j] == high)
+      if (GraphBuffer[(i * clock) + j] >= high)

         hithigh = 1;
         hithigh = 1;

-      else if (GraphBuffer[(i * clock) + j] == low)
+      else if (GraphBuffer[(i * clock) + j] <= low)

         hitlow = 1;
 
       /* it doesn't count if it's the first part of our read
         hitlow = 1;
 
       /* it doesn't count if it's the first part of our read


@@ -149,6 +150,8 @@ retest:
         PrintAndLog("EM410x Tag ID: %s", id);
         PrintAndLog("Unique Tag ID: %s", id2);
 
         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;
       }


@@ -177,8 +180,10 @@ retest:
   }
 
   /* if we've already retested after flipping bits, return */
   }
 
   /* if we've already retested after flipping bits, return */

-  if (retested++)
+       if (retested++){
+               PrintAndLog("Failed to decode");

     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++)


@@ -261,7 +266,7 @@ int CmdEM410xSim(const char *Cmd)
     /* stop bit */
   AppendGraph(1, clock, 0);
  
     /* stop bit */
   AppendGraph(1, clock, 0);
  

-  CmdLFSim("240"); //240 start_gap.
+  CmdLFSim("0"); //240 start_gap.

   return 0;
 }
 
   return 0;
 }
 


@@ -293,6 +298,14 @@ int CmdEM410xWatch(const char *Cmd)
        return 0;
 }
 
        return 0;
 }
 

+int CmdEM410xWatchnSpoof(const char *Cmd)
+{
+       CmdEM410xWatch(Cmd);
+    PrintAndLog("# Replaying : %s",global_em410xId);
+    CmdEM410xSim(global_em410xId);
+  return 0;
+}
+

 /* Read the transmitted data of an EM4x50 tag
  * Format:
  *
 /* Read the transmitted data of an EM4x50 tag
  * Format:
  *


@@ -507,12 +520,12 @@ 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;
   }


@@ -530,13 +543,13 @@ 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;
   }


@@ -565,7 +578,7 @@ 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


@@ -578,7 +591,7 @@ 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;


@@ -590,7 +603,7 @@ 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


@@ -601,8 +614,6 @@ 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"},


@@ -610,6 +621,7 @@ static command_t CommandTable[] =
   {"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"},