X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/76c7e6c36368c3fc23dc4fab1fe5852023c78fac..b216af9a24fb5691ec47e6e961e0a61a343a16d7:/client/cmdlfem4x.c?ds=inline

diff --git a/client/cmdlfem4x.c b/client/cmdlfem4x.c
index be31e1ea..67013b2e 100644
--- 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,
@@ -21,6 +21,8 @@
 #include "cmdlfem4x.h"
 #include "util.h"
 #include "data.h"
+#define LF_TRACE_BUFF_SIZE 12000
+#define LF_BITSSTREAM_LEN 1000
 
 char *global_em410xId;
 
@@ -55,7 +57,7 @@ int CmdEM410xRead(const char *Cmd)
 
   /* get clock */
   clock = GetClock(Cmd, high, 0);
-
+   
   /* parity for our 4 columns */
   parity[0] = parity[1] = parity[2] = parity[3] = 0;
   header = rows = 0;
@@ -96,7 +98,7 @@ int CmdEM410xRead(const char *Cmd)
 
 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)
@@ -125,7 +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 */
-        i -= 9 + (5 * rows) - 5;
+        i -= 9 + (5 * rows) -2;
 
         rows = header = 0;
       }
@@ -193,15 +195,33 @@ retest:
  *   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);
-
+  ClearGraph(1);
+  
   /* write it out a few times */
   for (h = 0; h < 4; h++)
   {
@@ -245,7 +265,7 @@ int CmdEM410xSim(const char *Cmd)
   }
 
   /* modulate that biatch */
-  CmdManchesterMod("");
+  CmdManchesterMod("64");
 
   /* booyah! */
   RepaintGraphWindow();
@@ -254,38 +274,38 @@ int CmdEM410xSim(const char *Cmd)
   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 read_h = (*Cmd == 'h');
-  //char k;
-  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
-
-    // Changed by martin, 4000 x 4 = 16000, 
-    // see http://www.proxmark.org/forum/viewtopic.php?pid=7235#p7235
+	int read_h = (*Cmd == 'h');
+	do
+	{
+		if (ukbhit()) {
+			printf("\naborted via keyboard!\n");
+			break;
+		}
+		
+		CmdLFRead(read_h ? "h" : "");
 		CmdSamples("16000");
- } while (
+		
+	} while (
 		!CmdEM410xRead("") 
 	);
-  return 0;
+	return 0;
 }
 
 int CmdEM410xWatchnSpoof(const char *Cmd)
 {
-  int read_h = (*Cmd == 'h');
-  do
-  {
-    CmdLFRead(read_h ? "h" : "");
-    CmdSamples("16000");
- } while ( ! CmdEM410xRead(""));
+	CmdEM410xWatch(Cmd);
     PrintAndLog("# Replaying : %s",global_em410xId);
     CmdEM410xSim(global_em410xId);
   return 0;
@@ -342,7 +362,7 @@ int CmdEM4x50Read(const char *Cmd)
       ++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;
@@ -506,84 +526,79 @@ int CmdEM410xWrite(const char *Cmd)
 int CmdReadWord(const char *Cmd)
 {
 	int Word = -1; //default to invalid word
-  UsbCommand c;
+	UsbCommand c;
   
-  sscanf(Cmd, "%d", &Word);
+	sscanf(Cmd, "%d", &Word);
   
 	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;
+	}
   
-  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);
 
-	size_t bytelength = 4096;
-	uint8_t data[bytelength];
-	memset(data, 0x00, bytelength);
+	uint8_t data[LF_TRACE_BUFF_SIZE] = {0x00};
 
-	GetFromBigBuf(data,bytelength,3560);  //3560 -- should be offset..
+	GetFromBigBuf(data,LF_TRACE_BUFF_SIZE,3560);  //3560 -- should be offset..
 	WaitForResponseTimeout(CMD_ACK,NULL, 1500);
 
-	for (int j = 0; j < bytelength; j++) {
-		GraphBuffer[j] = ((int)data[j]) - 128;
+	for (int j = 0; j < LF_TRACE_BUFF_SIZE; j++) {
+		GraphBuffer[j] = ((int)data[j]);
 	}
-	GraphTraceLen = bytelength;
-	RepaintGraphWindow();
-
-	manchester_decode(data, bytelength);
-
-	free(data);
+	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)
 {
 	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) | (Word < 0) ) {
-    PrintAndLog("Word must be between 0 and 15");
-    return 1;
-  }
-  
-  PrintAndLog("Reading word %d with password %08X", Word, Password);
+		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};
 
-	size_t bytelength = 4096;
-	uint8_t data[bytelength];
-	memset(data, 0x00, bytelength);
-
-	GetFromBigBuf(data,bytelength,3560);  //3560 -- should be offset..
+	GetFromBigBuf(data,LF_TRACE_BUFF_SIZE,3560);  //3560 -- should be offset..
 	WaitForResponseTimeout(CMD_ACK,NULL, 1500);
 
-	for (int j = 0; j < bytelength; j++) {
-		GraphBuffer[j] = ((int)data[j]) - 128;
+	for (int j = 0; j < LF_TRACE_BUFF_SIZE; j++) {
+		GraphBuffer[j] = ((int)data[j]);
 	}
-	GraphTraceLen = bytelength;
+	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();
-
-	manchester_decode(data, bytelength);
-
-	free(data);
   return 0;
 }
 
@@ -600,7 +615,7 @@ int CmdWriteWord(const char *Cmd)
     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
@@ -613,7 +628,7 @@ int CmdWriteWord(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;
@@ -625,7 +640,7 @@ int CmdWriteWordPWD(const char *Cmd)
     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
@@ -636,17 +651,15 @@ int CmdWriteWordPWD(const char *Cmd)
   return 0;
 }
 
-
-
 static command_t CommandTable[] =
 {
   {"help", CmdHelp, 1, "This help"},
-  {"410read", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag"},
-  {"410sim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x tag"},
-  {"410watch", CmdEM410xWatch, 0, "['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)"},
-  {"410spoof", CmdEM410xWatchnSpoof, 0, "['h'] --- Watches for EM410x 125/134 kHz tags, and replays them. (option 'h' for 134)" },
-  {"410write", CmdEM410xWrite, 1, "<UID> <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate"},
-  {"4xread", CmdEM4x50Read, 1, "Extract data from EM4x50 tag"},
+  {"410xread", CmdEM410xRead, 1, "[clock rate] -- Extract ID from EM410x tag"},
+  {"410xsim", CmdEM410xSim, 0, "<UID> -- Simulate EM410x 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"},