fix 'hf iclass sim'

[proxmark3-svn] / client / cmdhflegic.c

diff --git a/client/cmdhflegic.c b/client/cmdhflegic.c
index bf874b624c40aad34a255834176233c4d1a65dbf..14942017d8c8c0731a1aa23b65f3547b1d171751 100644 (file)
--- a/client/cmdhflegic.c
+++ b/client/cmdhflegic.c
@@ -8,40 +8,43 @@
 // High frequency Legic commands
 //-----------------------------------------------------------------------------
 
 // High frequency Legic commands
 //-----------------------------------------------------------------------------
 

+#include "cmdhflegic.h"
+

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

-#include "proxmark3.h"
-#include "data.h"
+#include <inttypes.h>
+#include "comms.h"

 #include "ui.h"
 #include "cmdparser.h"
 #include "ui.h"
 #include "cmdparser.h"

-#include "cmdhflegic.h"

 #include "cmdmain.h"
 #include "cmdmain.h"

+#include "util.h"
+#include "../include/legic.h"

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

-static command_t CommandTable[] = 
+static command_t CommandTable[] =

 {
 {

-  {"help",        CmdHelp,        1, "This help"},
-  {"decode",      CmdLegicDecode, 0, "Display deobfuscated and decoded LEGIC RF tag data (use after hf legic reader)"},
-  {"reader",      CmdLegicRFRead, 0, "[offset [length]] -- read bytes from a LEGIC card"},
-  {"save",        CmdLegicSave,   0, "<filename> [<length>] -- Store samples"},
-  {"load",        CmdLegicLoad,   0, "<filename> -- Restore samples"},
-  {"sim",         CmdLegicRfSim,  0, "[phase drift [frame drift [req/resp drift]]] Start tag simulator (use after load or read)"},
-  {"write",       CmdLegicRfWrite,0, "<offset> <length> -- Write sample buffer (user after load or read)"},
-  {"fill",        CmdLegicRfFill, 0, "<offset> <length> <value> -- Fill/Write tag with constant value"},
-  {NULL, NULL, 0, NULL}
+       {"help",        CmdHelp,        1, "This help"},
+       {"decode",      CmdLegicDecode, 0, "Display deobfuscated and decoded LEGIC RF tag data (use after hf legic reader)"},
+       {"reader",      CmdLegicRFRead, 0, "[offset [length]] -- read bytes from a LEGIC card"},
+       {"save",        CmdLegicSave,   0, "<filename> [<length>] -- Store samples"},
+       {"load",        CmdLegicLoad,   0, "<filename> -- Restore samples"},
+       {"sim",         CmdLegicRfSim,  0, "[tagtype, 0:MIM22, 1:MIM256, 2:MIM1024] Start tag simulator (use after load or read)"},
+       {"write",       CmdLegicRfWrite,0, "<offset> <length> -- Write sample buffer (user after load or read)"},
+       {"fill",        CmdLegicRfFill, 0, "<offset> <length> <value> -- Fill/Write tag with constant value"},
+       {NULL,          NULL,           0, NULL}

 };
 
 int CmdHFLegic(const char *Cmd)
 {
 };
 
 int CmdHFLegic(const char *Cmd)
 {

-  CmdsParse(CommandTable, Cmd);
-  return 0;
+       CmdsParse(CommandTable, Cmd);
+       return 0;

 }
 
 int CmdHelp(const char *Cmd)
 {
 }
 
 int CmdHelp(const char *Cmd)
 {

-  CmdsHelp(CommandTable);
-  return 0;
+       CmdsHelp(CommandTable);
+       return 0;

 }
 
 /*
 }
 
 /*


@@ -51,298 +54,327 @@ int CmdHelp(const char *Cmd)
  */
 int CmdLegicDecode(const char *Cmd)
 {
  */
 int CmdLegicDecode(const char *Cmd)
 {

-  int i, j, k, n;
-  int segment_len = 0;
-  int segment_flag = 0;
-  int stamp_len = 0;
-  int crc = 0;
-  int wrp = 0;
-  int wrc = 0;
-  uint8_t data_buf[1024]; // receiver buffer
-  char out_string[3076]; // just use big buffer - bad practice
-  char token_type[4];
-  
-  // copy data from proxmark into buffer
-   GetFromBigBuf(data_buf,sizeof(data_buf),0);
-   WaitForResponse(CMD_ACK,NULL);
-    
-  // Output CDF System area (9 bytes) plus remaining header area (12 bytes)
-  
-  PrintAndLog("\nCDF: System Area");
-  
-  PrintAndLog("MCD: %02x, MSN: %02x %02x %02x, MCC: %02x",
-    data_buf[0],
-    data_buf[1],
-    data_buf[2],
-    data_buf[3],
-    data_buf[4]
-  );
-  
-  crc = data_buf[4];
- 
-  switch (data_buf[5]&0x7f) {
-    case 0x00 ... 0x2f:
-      strncpy(token_type, "IAM",sizeof(token_type));
-      break;
-    case 0x30 ... 0x6f:
-      strcpy(token_type, "SAM");
-      break;
-    case 0x70 ... 0x7f:
-      strcpy(token_type, "GAM");
-      break;
-    default:
-      strcpy(token_type, "???");
-      break;
-  }
-  
-  stamp_len = 0xfc - data_buf[6];
-  
-  PrintAndLog("DCF: %02x %02x, Token_Type=%s (OLE=%01u), Stamp_len=%02u",
-    data_buf[5],
-    data_buf[6],
-    token_type,
-    (data_buf[5]&0x80)>>7,
-    stamp_len
-  );
-  
-  PrintAndLog("WRP=%02u, WRC=%01u, RD=%01u, raw=%02x, SSC=%02x",
-    data_buf[7]&0x0f,
-    (data_buf[7]&0x70)>>4,
-    (data_buf[7]&0x80)>>7,
-    data_buf[7],
-    data_buf[8]
-  );
-  
-  PrintAndLog("Remaining Header Area");
-  
-  PrintAndLog("%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
-      data_buf[9],
-    data_buf[10],
-    data_buf[11],
-    data_buf[12],
-    data_buf[13],
-    data_buf[14],
-    data_buf[15],
-    data_buf[16],
-    data_buf[17],
-    data_buf[18],
-    data_buf[19],
-    data_buf[20],
-    data_buf[21]
-  );
-  
-  PrintAndLog("\nADF: User Area");
-  
-  i = 22;  
-  for (n=0; n<64; n++) {
-    segment_len = ((data_buf[i+1]^crc)&0x0f) * 256 + (data_buf[i]^crc);
-    segment_flag = ((data_buf[i+1]^crc)&0xf0)>>4;
-    
-    wrp = (data_buf[i+2]^crc);
-    wrc = ((data_buf[i+3]^crc)&0x70)>>4;
-    
-     PrintAndLog("Segment %02u: raw header=%02x %02x %02x %02x, flag=%01x (valid=%01u, last=%01u), len=%04u, WRP=%02u, WRC=%02u, RD=%01u, CRC=%02x",
-      n,
-      data_buf[i]^crc,
-      data_buf[i+1]^crc,
-      data_buf[i+2]^crc,
-      data_buf[i+3]^crc,
-      segment_flag,
-      (segment_flag&0x4)>>2,
-      (segment_flag&0x8)>>3,
-      segment_len,
-      wrp,
-      wrc,
-      ((data_buf[i+3]^crc)&0x80)>>7,
-      (data_buf[i+4]^crc)
-    );
-    
-    i+=5;
-    
-    if (wrc>0) {
-      PrintAndLog("WRC protected area:");
-      for (k=0, j=0; k < wrc && j<(sizeof(out_string)-3); k++, i++, j += 3) {
-        sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
-        out_string[j+2] = ' ';
-      };
-        
-      out_string[j] = '\0';
-    
-      PrintAndLog("%s", out_string);
-    }
-    
-    if (wrp>wrc) {
-      PrintAndLog("Remaining write protected area:");
-      
-      for (k=0, j=0; k < (wrp-wrc) && j<(sizeof(out_string)-3); k++, i++, j += 3) {
-        sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
-        out_string[j+2] = ' ';
-      };
-    
-      out_string[j] = '\0';
-    
-      PrintAndLog("%s", out_string);
-      if((wrp-wrc) == 8) {
-        sprintf(out_string,"Card ID: %2X%02X%02X",data_buf[i-4]^crc,data_buf[i-3]^crc,data_buf[i-2]^crc);
-        PrintAndLog("%s", out_string);
-      }
-    }
-    
-    PrintAndLog("Remaining segment payload:");
-    for (k=0, j=0; k < (segment_len - wrp - 5) && j<(sizeof(out_string)-3); k++, i++, j += 3) {
-      sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
-      out_string[j+2] = ' ';
-    };
-    
-    out_string[j] = '\0';
-    
-    PrintAndLog("%s", out_string);
-    
-    // end with last segment
-    if (segment_flag & 0x8)
-      return 0;
-  };
-  return 0;
+       int i, j, k, n;
+       int segment_len = 0;
+       int segment_flag = 0;
+       int stamp_len = 0;
+       int crc = 0;
+       int wrp = 0;
+       int wrc = 0;
+       uint8_t data_buf[1053]; // receiver buffer
+       char out_string[3076]; // just use big buffer - bad practice
+       char token_type[4];
+
+       // copy data from proxmark into buffer
+       GetFromBigBuf(data_buf, sizeof(data_buf), 0, NULL, -1, false);
+
+       // Output CDF System area (9 bytes) plus remaining header area (12 bytes)
+
+       PrintAndLog("\nCDF: System Area");
+
+       PrintAndLog("MCD: %02x, MSN: %02x %02x %02x, MCC: %02x",
+               data_buf[0],
+               data_buf[1],
+               data_buf[2],
+               data_buf[3],
+               data_buf[4]
+       );
+
+       crc = data_buf[4];
+
+       switch (data_buf[5]&0x7f) {
+       case 0x00 ... 0x2f:
+               strncpy(token_type, "IAM",sizeof(token_type));
+               break;
+       case 0x30 ... 0x6f:
+               strcpy(token_type, "SAM");
+               break;
+       case 0x70 ... 0x7f:
+               strcpy(token_type, "GAM");
+               break;
+       default:
+               strcpy(token_type, "???");
+               break;
+       }
+
+       stamp_len = 0xfc - data_buf[6];
+
+       PrintAndLog("DCF: %02x %02x, Token_Type=%s (OLE=%01u), Stamp_len=%02u",
+               data_buf[5],
+               data_buf[6],
+               token_type,
+               (data_buf[5]&0x80)>>7,
+               stamp_len
+       );
+
+       PrintAndLog("WRP=%02u, WRC=%01u, RD=%01u, raw=%02x, SSC=%02x",
+               data_buf[7]&0x0f,
+               (data_buf[7]&0x70)>>4,
+               (data_buf[7]&0x80)>>7,
+               data_buf[7],
+               data_buf[8]
+       );
+
+       PrintAndLog("Remaining Header Area");
+
+       PrintAndLog("%02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x",
+               data_buf[9],
+               data_buf[10],
+               data_buf[11],
+               data_buf[12],
+               data_buf[13],
+               data_buf[14],
+               data_buf[15],
+               data_buf[16],
+               data_buf[17],
+               data_buf[18],
+               data_buf[19],
+               data_buf[20],
+               data_buf[21]
+       );
+
+       PrintAndLog("\nADF: User Area");
+
+       i = 22;
+       for (n=0; n<64; n++) {
+               segment_len = ((data_buf[i+1]^crc)&0x0f) * 256 + (data_buf[i]^crc);
+               segment_flag = ((data_buf[i+1]^crc)&0xf0)>>4;
+
+               wrp = (data_buf[i+2]^crc);
+               wrc = ((data_buf[i+3]^crc)&0x70)>>4;
+
+               PrintAndLog("Segment %02u: raw header=%02x %02x %02x %02x, flag=%01x (valid=%01u, last=%01u), len=%04u, WRP=%02u, WRC=%02u, RD=%01u, CRC=%02x",
+                       n,
+                       data_buf[i]^crc,
+                       data_buf[i+1]^crc,
+                       data_buf[i+2]^crc,
+                       data_buf[i+3]^crc,
+                       segment_flag,
+                       (segment_flag&0x4)>>2,
+                       (segment_flag&0x8)>>3,
+                       segment_len,
+                       wrp,
+                       wrc,
+                       ((data_buf[i+3]^crc)&0x80)>>7,
+                       (data_buf[i+4]^crc)
+               );
+
+               i+=5;
+
+               if (wrc>0) {
+                       PrintAndLog("WRC protected area:");
+                       for (k=0, j=0; k < wrc && j<(sizeof(out_string)-3); k++, i++, j += 3) {
+                               sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
+                               out_string[j+2] = ' ';
+                       };
+
+                       out_string[j] = '\0';
+
+                       PrintAndLog("%s", out_string);
+               }
+
+               if (wrp>wrc) {
+                       PrintAndLog("Remaining write protected area:");
+
+                       for (k=0, j=0; k < (wrp-wrc) && j<(sizeof(out_string)-3); k++, i++, j += 3) {
+                               sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
+                               out_string[j+2] = ' ';
+                       };
+
+                       out_string[j] = '\0';
+
+                       PrintAndLog("%s", out_string);
+                       if((wrp-wrc) == 8) {
+                               sprintf(out_string,"Card ID: %2X%02X%02X",data_buf[i-4]^crc,data_buf[i-3]^crc,data_buf[i-2]^crc);
+                               PrintAndLog("%s", out_string);
+                       }
+               }
+
+               PrintAndLog("Remaining segment payload:");
+               for (k=0, j=0; k < (segment_len - wrp - 5) && j<(sizeof(out_string)-3); k++, i++, j += 3) {
+                       sprintf(&out_string[j], "%02x", (data_buf[i]^crc));
+                       out_string[j+2] = ' ';
+               };
+
+               out_string[j] = '\0';
+
+               PrintAndLog("%s", out_string);
+
+               // end with last segment
+               if (segment_flag & 0x8)
+                       return 0;
+       };
+       return 0;

 }
 
 int CmdLegicRFRead(const char *Cmd)
 {
 }
 
 int CmdLegicRFRead(const char *Cmd)
 {

-  int byte_count=0,offset=0;
-  sscanf(Cmd, "%i %i", &offset, &byte_count);
-  if(byte_count == 0) byte_count = -1;
-  if(byte_count + offset > 1024) byte_count = 1024 - offset;
-  UsbCommand c={CMD_READER_LEGIC_RF, {offset, byte_count, 0}};
-  SendCommand(&c);
-  return 0;
+       int byte_count=0,offset=0;
+       sscanf(Cmd, "%i %i", &offset, &byte_count);
+       if(byte_count == 0) byte_count = -1;
+       if(byte_count + offset > 1024) byte_count = 1024 - offset;
+       UsbCommand c={CMD_READER_LEGIC_RF, {offset, byte_count, 0}};
+       SendCommand(&c);
+       UsbCommand resp;
+       WaitForResponse(CMD_ACK,&resp);
+       switch (resp.arg[0]) {
+               legic_card_select_t card;
+               case 0:
+                       memcpy(&card, resp.d.asBytes, sizeof(card));
+                       PrintAndLog("Card (MIM %i) read, use 'hf legic decode' or", card.cardsize);
+                       PrintAndLog("'data hexsamples %d' to view results", (resp.arg[1] + 7) & ~7);
+                       break;
+               case 1:
+                       PrintAndLog("No or unknown card found, aborting");
+                       break;
+               case 2:
+                       PrintAndLog("operation failed @ 0x%03.3x", resp.arg[1]);
+                       break;
+               }
+       return resp.arg[0];

 }
 
 int CmdLegicLoad(const char *Cmd)
 {
 }
 
 int CmdLegicLoad(const char *Cmd)
 {

-    FILE *f = fopen(Cmd, "r");
-    if(!f) {
-        PrintAndLog("couldn't open '%s'", Cmd);
-        return -1;
-    }
-    char line[80]; int offset = 0; unsigned int data[8];
-    while(fgets(line, sizeof(line), f)) {
-        int res = sscanf(line, "%x %x %x %x %x %x %x %x", 
-            &data[0], &data[1], &data[2], &data[3],
-            &data[4], &data[5], &data[6], &data[7]);
-        if(res != 8) {
-          PrintAndLog("Error: could not read samples");
-          fclose(f);
-          return -1;
-        }
-        UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 0, 0}};
-        int j; for(j = 0; j < 8; j++) {
-            c.d.asBytes[j] = data[j];
-        }
-        SendCommand(&c);
-        WaitForResponse(CMD_ACK, NULL);
-        offset += 8;
-    }
-    fclose(f);
-    PrintAndLog("loaded %u samples", offset);
-    return 0;
+       char filename[FILE_PATH_SIZE] = {0x00};
+       int len = 0;
+
+       if (param_getchar(Cmd, 0) == 'h' || param_getchar(Cmd, 0)== 0x00) {
+               PrintAndLog("It loads datasamples from the file `filename`");
+               PrintAndLog("Usage:  hf legic load <file name>");
+               PrintAndLog(" sample: hf legic load filename");
+               return 0;
+       }
+
+       len = strlen(Cmd);
+       if (len > FILE_PATH_SIZE) {
+               PrintAndLog("Filepath too long (was %s bytes), max allowed is %s ", len, FILE_PATH_SIZE);
+               return 0;
+       }
+       memcpy(filename, Cmd, len);
+
+       FILE *f = fopen(filename, "r");
+       if (!f) {
+               PrintAndLog("couldn't open '%s'", Cmd);
+               return -1;
+       }
+       char line[80]; int offset = 0; unsigned int data[8];
+       while (fgets(line, sizeof(line), f)) {
+               int res = sscanf(line, "%x %x %x %x %x %x %x %x",
+                       &data[0], &data[1], &data[2], &data[3],
+                       &data[4], &data[5], &data[6], &data[7]);
+               if (res != 8) {
+                       PrintAndLog("Error: could not read samples");
+                       fclose(f);
+                       return -1;
+               }
+               UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {offset, 1, 0}};
+               int j; for(j = 0; j < 8; j++) {
+                       c.d.asBytes[j] = data[j];
+               }
+               SendCommand(&c);
+               WaitForResponse(CMD_ACK, NULL);
+               offset += 8;
+       }
+       fclose(f);
+       PrintAndLog("loaded %u samples", offset);
+       return 0;

 }
 
 int CmdLegicSave(const char *Cmd)
 {
 }
 
 int CmdLegicSave(const char *Cmd)
 {

-  int requested = 1024;
-  int offset = 0;
-  int delivered = 0;
-  char filename[1024];
-  uint8_t got[1024];
-  
-  sscanf(Cmd, " %s %i %i", filename, &requested, &offset);
-
-  /* If no length given save entire legic read buffer */
-  /* round up to nearest 8 bytes so the saved data can be used with legicload */
-  if (requested == 0) {
-    requested = 1024;
-  }
-  if (requested % 8 != 0) {
-    int remainder = requested % 8;
-    requested = requested + 8 - remainder;
-  }
-  if (offset + requested > sizeof(got)) {
-    PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > 1024");
-    return 0;
-  }
-  
-  FILE *f = fopen(filename, "w");
-  if(!f) {
-    PrintAndLog("couldn't open '%s'", Cmd+1);
-    return -1;
-  }
-
-  GetFromBigBuf(got,requested,offset);
-  WaitForResponse(CMD_ACK,NULL);
-
-  for (int j = 0; j < requested; j += 8) {
-    fprintf(f, "%02x %02x %02x %02x %02x %02x %02x %02x\n",
-      got[j+0],
-      got[j+1],
-      got[j+2],
-      got[j+3],
-      got[j+4],
-      got[j+5],
-      got[j+6],
-      got[j+7]
-    );
-    delivered += 8;
-    if (delivered >= requested)
-      break;
-  }
-
-  fclose(f);
-  PrintAndLog("saved %u samples", delivered);
-  return 0;
+       int requested = 1024;
+       int offset = 0;
+       int delivered = 0;
+       char filename[FILE_PATH_SIZE];
+       uint8_t got[1024];
+
+       sscanf(Cmd, " %s %i %i", filename, &requested, &offset);
+
+       /* If no length given save entire legic read buffer */
+       /* round up to nearest 8 bytes so the saved data can be used with legicload */
+       if (requested == 0) {
+               requested = 1024;
+       }
+       if (requested % 8 != 0) {
+               int remainder = requested % 8;
+               requested = requested + 8 - remainder;
+       }
+       if (offset + requested > sizeof(got)) {
+               PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > 1024");
+               return 0;
+       }
+
+       FILE *f = fopen(filename, "w");
+       if (!f) {
+               PrintAndLog("couldn't open '%s'", Cmd+1);
+               return -1;
+       }
+
+       GetFromBigBuf(got, requested, offset, NULL, -1, false);
+
+       for (int j = 0; j < requested; j += 8) {
+               fprintf(f, "%02x %02x %02x %02x %02x %02x %02x %02x\n",
+                       got[j+0],
+                       got[j+1],
+                       got[j+2],
+                       got[j+3],
+                       got[j+4],
+                       got[j+5],
+                       got[j+6],
+                       got[j+7]
+               );
+               delivered += 8;
+               if (delivered >= requested)
+                       break;
+       }
+
+       fclose(f);
+       PrintAndLog("saved %u samples", delivered);
+       return 0;

 }
 
 int CmdLegicRfSim(const char *Cmd)
 {
    UsbCommand c={CMD_SIMULATE_TAG_LEGIC_RF};
 }
 
 int CmdLegicRfSim(const char *Cmd)
 {
    UsbCommand c={CMD_SIMULATE_TAG_LEGIC_RF};

-   c.arg[0] = 6;
-   c.arg[1] = 3;
-   c.arg[2] = 0;
-   sscanf(Cmd, " %"lli" %"lli" %"lli, &c.arg[0], &c.arg[1], &c.arg[2]);
+   c.arg[0] = 1;
+   sscanf(Cmd, " %" SCNi64, &c.arg[0]);

    SendCommand(&c);
    return 0;
 }
 
 int CmdLegicRfWrite(const char *Cmd)
 {
    SendCommand(&c);
    return 0;
 }
 
 int CmdLegicRfWrite(const char *Cmd)
 {

-    UsbCommand c={CMD_WRITER_LEGIC_RF};
-    int res = sscanf(Cmd, " 0x%"llx" 0x%"llx, &c.arg[0], &c.arg[1]);
-       if(res != 2) {
+       UsbCommand c={CMD_WRITER_LEGIC_RF};
+       int res = sscanf(Cmd, " 0x%" SCNx64 " 0x%" SCNx64, &c.arg[0], &c.arg[1]);
+       if (res != 2) {

                PrintAndLog("Please specify the offset and length as two hex strings");
                PrintAndLog("Please specify the offset and length as two hex strings");

-        return -1;
-    }
-    SendCommand(&c);
-    return 0;
+               return -1;
+       }
+       SendCommand(&c);
+       return 0;

 }
 
 int CmdLegicRfFill(const char *Cmd)
 {
 }
 
 int CmdLegicRfFill(const char *Cmd)
 {

-    UsbCommand cmd ={CMD_WRITER_LEGIC_RF};
-    int res = sscanf(Cmd, " 0x%"llx" 0x%"llx" 0x%"llx, &cmd.arg[0], &cmd.arg[1], &cmd.arg[2]);
-    if(res != 3) {
-        PrintAndLog("Please specify the offset, length and value as two hex strings");
-        return -1;
-    }
-
-    int i;
-    UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {0, 0, 0}};
-    for(i = 0; i < 48; i++) {
-      c.d.asBytes[i] = cmd.arg[2];
-    }
-    for(i = 0; i < 22; i++) {
-      c.arg[0] = i*48;
-      SendCommand(&c);
-      WaitForResponse(CMD_ACK,NULL);
-    }
-    SendCommand(&cmd);
-    return 0;
+       UsbCommand cmd ={CMD_WRITER_LEGIC_RF};
+       int res = sscanf(Cmd, " 0x%" SCNx64 " 0x%" SCNx64 " 0x%" SCNx64, &cmd.arg[0], &cmd.arg[1], &cmd.arg[2]);
+       if (res != 3) {
+               PrintAndLog("Please specify the offset, length and value as two hex strings");
+               return -1;
+       }
+
+       int i;
+       UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {0, 1, 0}};
+       for (i = 0; i < 48; i++) {
+               c.d.asBytes[i] = cmd.arg[2];
+       }
+       for (i = 0; i < 22; i++) {
+               c.arg[0] = i*48;
+               SendCommand(&c);
+               WaitForResponse(CMD_ACK,NULL);
+       }
+       SendCommand(&cmd);
+       return 0;

  }
 
  }