]> git.zerfleddert.de Git - proxmark3-svn/blobdiff - client/cmdhflegic.c
CHG: missing file extension.
[proxmark3-svn] / client / cmdhflegic.c
index 35ba1f28c49d6d4d64b58b774d7ce571c8feed03..3cc6c4064487b40f56e51f9383c97876dec96511 100644 (file)
 //-----------------------------------------------------------------------------
 // High frequency Legic commands
 //-----------------------------------------------------------------------------
-
-#include <stdio.h>
-#include <string.h>
-#include "proxmark3.h"
-#include "data.h"
-#include "ui.h"
-#include "cmdparser.h"
 #include "cmdhflegic.h"
-#include "cmdmain.h"
 
 static int CmdHelp(const char *Cmd);
 
-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}
-};
+#define MAX_LENGTH 1024        
 
-int CmdHFLegic(const char *Cmd)
-{
-  CmdsParse(CommandTable, Cmd);
-  return 0;
+int usage_legic_calccrc(void){
+       PrintAndLog("Calculates the legic crc8/crc16 on the given data.");
+       PrintAndLog("There must be an even number of hexsymbols as input.");
+       PrintAndLog("Usage:  hf legic crc [h] d <data> u <uidcrc> c <8|16>");
+       PrintAndLog("Options:");
+       PrintAndLog("      h             : this help");
+       PrintAndLog("      d <data>      : (hex symbols) bytes to calculate crc over");
+       PrintAndLog("      u <uidcrc>    : MCC hexbyte");
+       PrintAndLog("      c <8|16>      : Crc type");
+       PrintAndLog("");
+       PrintAndLog("Samples:");
+       PrintAndLog("      hf legic crc b deadbeef1122");
+       PrintAndLog("      hf legic crc b deadbeef1122 u 9A c 16");
+       return 0;
 }
-
-int CmdHelp(const char *Cmd)
-{
-  CmdsHelp(CommandTable);
-  return 0;
+int usage_legic_rdmem(void){   
+       PrintAndLog("Read data from a legic tag.");
+       PrintAndLog("Usage:  hf legic rdmem [h] <offset> <length> <IV>");
+       PrintAndLog("Options:");
+       PrintAndLog("      h             : this help");
+       PrintAndLog("      <offset>      : (hex) offset in data array to start download from");
+       PrintAndLog("      <length>      : (hex) number of bytes to read");
+       PrintAndLog("      <IV>          : (hex) (optional) Initialization vector to use. Must be odd and 7bits max");
+       PrintAndLog("");
+       PrintAndLog("Samples:");
+       PrintAndLog("      hf legic rdmem 0 16        - reads from byte[0] 0x16 bytes(system header)");
+       PrintAndLog("      hf legic rdmem 0 4 55      - reads from byte[0] 0x4 bytes with IV 0x55");
+       PrintAndLog("      hf legic rdmem 0 100 55    - reads 0x100 bytes with IV 0x55");
+       return 0;
+}
+int usage_legic_sim(void){
+       PrintAndLog("Simulates a LEGIC Prime tag. MIM22, MIM256, MIM1024 types can be emulated");
+       PrintAndLog("Use eload/esave to upload a dump into emulator memory");
+       PrintAndLog("Usage:  hf legic sim [h] <tagtype> <phase> <frame> <reqresp>");
+       PrintAndLog("Options:");
+       PrintAndLog("      h             : this help");
+       PrintAndLog("      <tagtype>     : 0 = MIM22");
+       PrintAndLog("                    : 1 = MIM256 (default)");
+       PrintAndLog("                    : 2 = MIM1024");       
+       PrintAndLog("      <phase>       : phase drift");
+       PrintAndLog("      <frame>       : frame drift");
+       PrintAndLog("      <reqresp>     : reqresp drift");
+       PrintAndLog("");
+       PrintAndLog("Samples:");
+       PrintAndLog("      hf legic sim");
+       PrintAndLog("      hf legic sim ");
+       return 0;
+}
+int usage_legic_write(void){
+       PrintAndLog("Write data to a LEGIC Prime tag. It autodetects tagsize to make sure size");
+       PrintAndLog("Usage:  hf legic write [h] o <offset> d <data (hex symbols)>");
+       PrintAndLog("Options:");
+       PrintAndLog("      h             : this help");
+       PrintAndLog("      o <offset>    : (hex) offset in data array to start writing");
+       //PrintAndLog("  <IV>          : (optional) Initialization vector to use (ODD and 7bits)");
+       PrintAndLog("      d <data>      : (hex symbols) bytes to write ");
+       PrintAndLog("");
+       PrintAndLog("Samples:");
+       PrintAndLog("      hf legic write o 10 d 11223344    - Write 0x11223344 starting from offset 0x10");
+       return 0;
+}
+int usage_legic_reader(void){
+       PrintAndLog("Read UID and type information from a legic tag.");
+       PrintAndLog("Usage:  hf legic reader [h]");
+       PrintAndLog("Options:");
+       PrintAndLog("      h             : this help");
+       PrintAndLog("");
+       PrintAndLog("Samples:");
+       PrintAndLog("      hf legic reader");
+       return 0;
+}
+int usage_legic_info(void){
+       PrintAndLog("Reads information from a legic prime tag.");
+       PrintAndLog("Shows systemarea, user areas etc");
+       PrintAndLog("Usage:  hf legic info [h]");
+       PrintAndLog("Options:");
+       PrintAndLog("      h             : this help");
+       PrintAndLog("");
+       PrintAndLog("Samples:");
+       PrintAndLog("      hf legic info");
+       return 0;
+}
+int usage_legic_dump(void){
+       PrintAndLog("Reads all pages from LEGIC Prime MIM22, MIM256, MIM1024");
+       PrintAndLog("and saves binary dump into the file `filename.bin` or `cardUID.bin`");
+       PrintAndLog("It autodetects card type.\n");     
+       PrintAndLog("Usage:  hf legic dump [h] o <filename w/o .bin>");
+       PrintAndLog("Options:");
+       PrintAndLog("      h             : this help");
+       PrintAndLog("      o <filename>  : filename w/o '.bin' to dump bytes");
+       PrintAndLog("");
+       PrintAndLog("Samples:");
+       PrintAndLog("      hf legic dump");
+       PrintAndLog("      hf legic dump o myfile");
+       return 0;
+}
+int usage_legic_restore(void){
+       PrintAndLog("Reads binary file and it autodetects card type and verifies that the file has the same size");
+       PrintAndLog("Then write the data back to card. All bytes except the first 7bytes [UID(4) MCC(1) DCF(2)]\n");
+       PrintAndLog("Usage:   hf legic restore [h] i <filename w/o .bin>");
+       PrintAndLog("Options:");
+       PrintAndLog("      h             : this help");
+       PrintAndLog("      i <filename>  : filename w/o '.bin' to restore bytes on to card from");
+       PrintAndLog("");
+       PrintAndLog("Samples:");
+       PrintAndLog("      hf legic restore i myfile");
+       return 0;
+}
+int usage_legic_eload(void){
+       PrintAndLog("It loads binary dump from the file `filename.bin`");
+       PrintAndLog("Usage:  hf legic eload [h] [card memory] <file name w/o `.bin`>");
+       PrintAndLog("Options:");
+       PrintAndLog("      h             : this help"); 
+       PrintAndLog("      [card memory] : 0 = MIM22");
+       PrintAndLog("                    : 1 = MIM256 (default)");
+       PrintAndLog("                    : 2 = MIM1024");
+       PrintAndLog("      <filename>    : filename w/o .bin to load"); 
+       PrintAndLog("");
+       PrintAndLog("Samples:");
+       PrintAndLog("      hf legic eload 2 myfile");
+       return 0;
+}
+int usage_legic_esave(void){
+       PrintAndLog("It saves binary dump into the file `filename.bin` or `cardID.bin`");
+       PrintAndLog(" Usage:  hf legic esave [h] [card memory] [file name w/o `.bin`]");
+       PrintAndLog("Options:");
+       PrintAndLog("      h             : this help");
+       PrintAndLog("      [card memory] : 0 = MIM22");
+       PrintAndLog("                    : 1 = MIM256 (default)");
+       PrintAndLog("                    : 2 = MIM1024");
+       PrintAndLog("      <filename>    : filename w/o .bin to load"); 
+       PrintAndLog("");
+       PrintAndLog("Samples:");        
+       PrintAndLog("      hf legic esave 2 myfile");
+       return 0;
+}
+int usage_legic_wipe(void){
+       PrintAndLog("Fills a legic tag memory with zeros. From byte7 and to the end.");
+       PrintAndLog(" Usage:  hf legic wipe [h]");
+       PrintAndLog("Options:");
+       PrintAndLog("      h             : this help");
+       PrintAndLog("");
+       PrintAndLog("Samples:");        
+       PrintAndLog("      hf legic wipe");
+       return 0;
 }
-
 /*
  *  Output BigBuf and deobfuscate LEGIC RF tag data.
- *   This is based on information given in the talk held
+ *  This is based on information given in the talk held
  *  by Henryk Ploetz and Karsten Nohl at 26c3
  */
-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];
+int CmdLegicInfo(const char *Cmd) {
+
+       char cmdp = param_getchar(Cmd, 0);
+       if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_info();
+
+       int i = 0, k = 0, segmentNum = 0, segment_len = 0, segment_flag = 0;
+       int crc = 0, wrp = 0, wrc = 0;
+       uint8_t stamp_len = 0;
+       uint8_t data[1024]; // receiver buffer
+       char token_type[5] = {0,0,0,0,0};
+       int dcf = 0;
+       int bIsSegmented = 0;
+
+       CmdLegicRdmem("0 22 55");
+       
+       // copy data from device
+       GetEMLFromBigBuf(data, sizeof(data), 0);
+       if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2000)){
+               PrintAndLog("Command execute timeout");
+               return 1;
+       }
+       
+       // Output CDF System area (9 bytes) plus remaining header area (12 bytes)
+       crc = data[4];
+       uint32_t calc_crc =  CRC8Legic(data, 4);        
+       
+       PrintAndLog("\nCDF: System Area");
+       PrintAndLog("------------------------------------------------------");
+       PrintAndLog("MCD: %02x, MSN: %02x %02x %02x, MCC: %02x %s",
+               data[0],
+               data[1],
+               data[2],
+               data[3],
+               data[4],
+               (calc_crc == crc) ? "OK":"Fail"
+       );
  
-  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] = ' ';
-      };
+       // MCD = Manufacturer ID (should be list meaning something?)
+
+       token_type[0] = 0;
+       dcf = ((int)data[6] << 8) | (int)data[5];
+
+       // New unwritten media?
+       if(dcf == 0xFFFF) {
+
+               PrintAndLog("DCF: %d (%02x %02x), Token Type=NM (New Media)",
+                       dcf,
+                       data[5],
+                       data[6]
+               );
+       
+       } else if (dcf > 60000) {               // Master token?
+
+               int fl = 0;
+
+               if(data[6] == 0xec) {
+                       strncpy(token_type, "XAM", sizeof(token_type));
+                       fl = 1;
+                       stamp_len = 0x0c - (data[5] >> 4);
+               } else {
+                       switch (data[5] & 0x7f) {
+                       case 0x00 ... 0x2f:
+                               strncpy(token_type, "IAM", sizeof(token_type));
+                               fl = (0x2f - (data[5] & 0x7f)) + 1;
+                               break;
+                       case 0x30 ... 0x6f:
+                               strncpy(token_type, "SAM", sizeof(token_type));
+                               fl = (0x6f - (data[5] & 0x7f)) + 1;
+                               break;
+                       case 0x70 ... 0x7f:
+                               strncpy(token_type, "GAM", sizeof(token_type));
+                               fl = (0x7f - (data[5] & 0x7f)) + 1;
+                               break;
+                       }
+
+                       stamp_len = 0xfc - data[6];
+               }
+
+               PrintAndLog("DCF: %d (%02x %02x), Token Type=%s (OLE=%01u), OL=%02u, FL=%02u",
+                       dcf,
+                       data[5],
+                       data[6],
+                       token_type,
+                       (data[5] & 0x80 )>> 7,
+                       stamp_len,
+                       fl
+               );
+
+       } else {        // Is IM(-S) type of card...
+
+               if(data[7] == 0x9F && data[8] == 0xFF) {
+                       bIsSegmented = 1;
+                       strncpy(token_type, "IM-S", sizeof(token_type));
+               } else {
+                       strncpy(token_type, "IM", sizeof(token_type));
+               }
+
+               PrintAndLog("DCF: %d (%02x %02x), Token Type=%s (OLE=%01u)",
+                       dcf,
+                       data[5],
+                       data[6],
+                       token_type,
+                       (data[5]&0x80) >> 7
+               );
+       }
+
+       // Makes no sence to show this on blank media...
+       if(dcf != 0xFFFF) {
+
+               if(bIsSegmented) {
+                       PrintAndLog("WRP=%02u, WRC=%01u, RD=%01u, SSC=%02x",
+                               data[7] & 0x0f,
+                               (data[7] & 0x70) >> 4,
+                               (data[7] & 0x80) >> 7,
+                               data[8]
+                       );
+               }
+
+               // Header area is only available on IM-S cards, on master tokens this data is the master token data itself
+               if(bIsSegmented || dcf > 60000) {
+                       if(dcf > 60000) {
+                               PrintAndLog("Master token data");
+                               PrintAndLog("%s", sprint_hex(data+8, 14));
+                       } else {
+                               PrintAndLog("Remaining Header Area");
+                               PrintAndLog("%s", sprint_hex(data+9, 13));
+                       }
+               }
+       }
+       
+       uint8_t segCrcBytes[8] = {0,0,0,0,0,0,0,0};
+       uint32_t segCalcCRC = 0;
+       uint32_t segCRC = 0;
+
+       // Data card?
+       if(dcf <= 60000) {
+       
+               PrintAndLog("\nADF: User Area");
+               PrintAndLog("------------------------------------------------------");
+
+               if(bIsSegmented) {
+
+                       // Data start point on segmented cards
+                       i = 22;  
+
+                       // decode segments
+                       for (segmentNum=1; segmentNum < 128; segmentNum++ )
+                       {
+                               segment_len = ((data[i+1] ^ crc) & 0x0f) * 256 + (data[i] ^ crc);
+                               segment_flag = ((data[i+1] ^ crc) & 0xf0) >> 4;
+                               wrp = (data[i+2] ^ crc);
+                               wrc = ((data[i+3] ^ crc) & 0x70) >> 4;
+
+                               bool hasWRC = (wrc > 0);
+                               bool hasWRP = (wrp > wrc);
+                               int wrp_len = (wrp - wrc);
+                               int remain_seg_payload_len = (segment_len - wrp - 5);
+               
+                               // validate segment-crc
+                               segCrcBytes[0]=data[0];                 //uid0
+                               segCrcBytes[1]=data[1];                 //uid1
+                               segCrcBytes[2]=data[2];                 //uid2
+                               segCrcBytes[3]=data[3];                 //uid3
+                               segCrcBytes[4]=(data[i] ^ crc);   //hdr0
+                               segCrcBytes[5]=(data[i+1] ^ crc); //hdr1
+                               segCrcBytes[6]=(data[i+2] ^ crc); //hdr2
+                               segCrcBytes[7]=(data[i+3] ^ crc); //hdr3
+
+                               segCalcCRC = CRC8Legic(segCrcBytes, 8);
+                               segCRC = data[i+4] ^ crc;
+
+                               PrintAndLog("Segment %02u \nraw header | 0x%02X 0x%02X 0x%02X 0x%02X \nSegment len: %u,  Flag: 0x%X (valid:%01u, last:%01u), WRP: %02u, WRC: %02u, RD: %01u, CRC: 0x%02X (%s)",
+                                       segmentNum,
+                                       data[i] ^ crc,
+                                       data[i+1] ^ crc,
+                                       data[i+2] ^ crc,
+                                       data[i+3] ^ crc,
+                                       segment_len, 
+                                       segment_flag,
+                                       (segment_flag & 0x4) >> 2,
+                                       (segment_flag & 0x8) >> 3,
+                                       wrp,
+                                       wrc,
+                                       ((data[i+3]^crc) & 0x80) >> 7,
+                                       segCRC,
+                                       ( segCRC == segCalcCRC ) ? "OK" : "fail"
+                               );
+
+                               i += 5;
     
-      out_string[j] = '\0';
+                               if ( hasWRC ) {
+                                       PrintAndLog("WRC protected area:   (I %d | K %d| WRC %d)", i, k, wrc);
+                                       PrintAndLog("\nrow  | data");
+                                       PrintAndLog("-----+------------------------------------------------");
+
+                                       for ( k=i; k < (i + wrc); ++k)
+                                               data[k] ^= crc;
+
+                                       print_hex_break( data+i, wrc, 16);
+                       
+                                       i += wrc;
+                               }
     
-      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);
-      }
-    }
+                               if ( hasWRP ) {
+                                       PrintAndLog("Remaining write protected area:  (I %d | K %d | WRC %d | WRP %d  WRP_LEN %d)",i, k, wrc, wrp, wrp_len);
+                                       PrintAndLog("\nrow  | data");
+                                       PrintAndLog("-----+------------------------------------------------");
+
+                                       for (k=i; k < (i+wrp_len); ++k)
+                                               data[k] ^= crc;
+                       
+                                       print_hex_break( data+i, wrp_len, 16);
+                       
+                                       i += wrp_len;
+                       
+                                       // does this one work? (Answer: Only if KGH/BGH is used with BCD encoded card number! So maybe this will show just garbage...)
+                                       if( wrp_len == 8 )
+                                               PrintAndLog("Card ID: %2X%02X%02X", data[i-4]^crc, data[i-3]^crc, data[i-2]^crc);                       
+                               }
     
-    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] = ' ';
-    };
+                               PrintAndLog("Remaining segment payload:  (I %d | K %d | Remain LEN %d)", i, k, remain_seg_payload_len);
+                               PrintAndLog("\nrow  | data");
+                               PrintAndLog("-----+------------------------------------------------");
+
+                               for ( k=i; k < (i+remain_seg_payload_len); ++k)
+                                       data[k] ^= crc;
+               
+                               print_hex_break( data+i, remain_seg_payload_len, 16);
     
-    out_string[j] = '\0';
+                               i += remain_seg_payload_len;
+               
+                               PrintAndLog("-----+------------------------------------------------\n");
+
+                               // end with last segment
+                               if (segment_flag & 0x8) return 0;
+
+                       } // end for loop
+               
+               } else {
+
+                       // Data start point on unsegmented cards
+                       i = 8;
+
+                       wrp = data[7] & 0x0F;
+                       wrc = (data[7] & 0x70) >> 4;
+
+                       bool hasWRC = (wrc > 0);
+                       bool hasWRP = (wrp > wrc);
+                       int wrp_len = (wrp - wrc);
+                       int remain_seg_payload_len = (1024 - 22 - wrp); // Any chance to get physical card size here!?
+
+                       PrintAndLog("Unsegmented card - WRP: %02u, WRC: %02u, RD: %01u",
+                               wrp,
+                               wrc,
+                               (data[7] & 0x80) >> 7
+                       );
+
+                       if ( hasWRC ) {
+                               PrintAndLog("WRC protected area:   (I %d | WRC %d)", i, wrc);
+                               PrintAndLog("\nrow  | data");
+                               PrintAndLog("-----+------------------------------------------------");
+                               print_hex_break( data+i, wrc, 16);
+                               i += wrc;
+                       }
     
-    PrintAndLog("%s", out_string);
+                       if ( hasWRP ) {
+                               PrintAndLog("Remaining write protected area:  (I %d | WRC %d | WRP %d | WRP_LEN %d)", i, wrc, wrp, wrp_len);
+                               PrintAndLog("\nrow  | data");
+                               PrintAndLog("-----+------------------------------------------------");
+                               print_hex_break( data + i, wrp_len, 16);
+                               i += wrp_len;
+                       
+                               // does this one work? (Answer: Only if KGH/BGH is used with BCD encoded card number! So maybe this will show just garbage...)
+                               if( wrp_len == 8 )
+                                       PrintAndLog("Card ID: %2X%02X%02X", data[i-4], data[i-3], data[i-2]);
+                       }
     
-    // end with last segment
-    if (segment_flag & 0x8)
-      return 0;
-  };
-  return 0;
+                       PrintAndLog("Remaining segment payload:  (I %d | Remain LEN %d)", i, remain_seg_payload_len);
+                       PrintAndLog("\nrow  | data");
+                       PrintAndLog("-----+------------------------------------------------");
+                       print_hex_break( data + i, remain_seg_payload_len, 16);
+                       i += remain_seg_payload_len;
+               
+                       PrintAndLog("-----+------------------------------------------------\n");
+               }
+       }
+       return 0;
 }
 
-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;
-}
+// params:
+// offset in data memory
+// number of bytes to read
+int CmdLegicRdmem(const char *Cmd) {
 
-int CmdLegicLoad(const char *Cmd)
-{
-       char filename[FILE_PATH_SIZE] = {0x00};
-       int len = 0;
+       char cmdp = param_getchar(Cmd, 0);
+       if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_rdmem();
        
-       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, 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;
+       uint32_t offset = 0, len = 0, IV = 1;
+       sscanf(Cmd, "%x %x %x", &offset, &len, &IV);
+
+       // tagtype
+       legic_card_select_t card;
+       if (legic_get_type(&card)) {
+               PrintAndLog("Failed to identify tagtype");
+               return 1;
+       }
+
+       legic_print_type(card.cardsize, 0);
+
+       // OUT-OF-BOUNDS check
+       // UID 4 bytes can't be written to.
+       if ( len + offset >= card.cardsize ) {
+               len = card.cardsize - offset;
+               PrintAndLog("Out-of-bounds, Cardsize = %d, Trunc offset+len = %d", card.cardsize, len + offset);
+       }
+       
+       legic_chk_iv(&IV);
+       
+       UsbCommand c = {CMD_READER_LEGIC_RF, {offset, len, IV}};
+       clearCommandBuffer();
+       SendCommand(&c);
+       UsbCommand resp;
+       if ( !WaitForResponseTimeout(CMD_ACK, &resp, 3000) ) {
+               PrintAndLog("command execution time out");
+               return 1;
+       }
+
+       uint8_t isOK = resp.arg[0] & 0xFF;
+       uint16_t readlen = resp.arg[1];
+       if ( !isOK ) {
+               PrintAndLog("failed reading tag");
+               return 2;
+       }
+       
+       uint8_t *data = malloc(readlen);
+       if ( !data ){
+               PrintAndLog("Cannot allocate memory");
+               return 2;
+       }
+                       
+       if ( readlen != len )
+               PrintAndLog("Fail, only managed to read 0x%02X bytes", readlen);
+                       
+       // copy data from device
+       GetEMLFromBigBuf(data, readlen, 0);
+       if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500)){
+               PrintAndLog("Command execute timeout");
+               free(data);
+               return 1;
+       }
+       
+       PrintAndLog("\n ##  |  0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F");
+       PrintAndLog("-----+------------------------------------------------------------------------------------------------");
+       print_hex_break( data, readlen, 32);
+       free(data);
+       return 0;
 }
 
-int CmdLegicSave(const char *Cmd)
-{
-  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");
+// should say which tagtype
+// should load a tag to device mem.
+// int phase, int frame, int reqresp
+int CmdLegicRfSim(const char *Cmd) {
+       UsbCommand c = {CMD_SIMULATE_TAG_LEGIC_RF, {6,3,0}};
+       sscanf(Cmd, " %"lli" %"lli" %"lli, &c.arg[0], &c.arg[1], &c.arg[2]);
+       clearCommandBuffer();
+       SendCommand(&c);
+       return 0;
+}
+
+int CmdLegicRfWrite(const char *Cmd) {
+
+       uint8_t *data = NULL;
+       uint8_t cmdp = 0;
+       bool errors = false;
+       int len = 0, bg, en;
+       uint32_t offset = 0, IV = 0x55;
+       
+       while(param_getchar(Cmd, cmdp) != 0x00) {
+               switch(param_getchar(Cmd, cmdp)) {
+               case 'd':
+               case 'D':
+                       // peek at length of the input string so we can
+                       // figure out how many elements to malloc in "data"
+                       bg=en=0;
+                       if (param_getptr(Cmd, &bg, &en, cmdp+1)) {
+                               errors = true;
+                               break;
+                       }
+                       len = (en - bg + 1);
+
+                       // check that user entered even number of characters
+                       // for hex data string
+                       if (len & 1) {
+                               errors = true;
+                               break;
+                       }
+                       
+                       // limit number of bytes to write. This is not a 'restore' command.
+                       if ( (len>>1) > 100 ){
+                               PrintAndLog("Max bound on 100bytes to write a one time.");
+                               PrintAndLog("Use the 'hf legic restore' command if you want to write the whole tag at once");
+                               errors = true;
+                       }
+
+                       // it's possible for user to accidentally enter "b" parameter
+                       // more than once - we have to clean previous malloc
+                       if (data)
+                               free(data);
+                       
+                       data = malloc(len >> 1);
+                       if ( data == NULL ) {
+                               PrintAndLog("Can't allocate memory. exiting");
+                               errors = true;
+                               break;
+                       }
+                       
+                       if (param_gethex(Cmd, cmdp+1, data, len)) {
+                               errors = true;
+                               break;
+                       }
+
+                       len >>= 1;      
+                       cmdp += 2;
+                       break;
+               case 'o':
+               case 'O':
+                       offset = param_get32ex(Cmd, cmdp+1, 4, 16);
+                       cmdp += 2;
+                       break;
+               case 'h':
+               case 'H':
+                       errors = true;
+                       break;
+               default:
+                       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
+                       errors = true;
+                       break;
+               }
+               if (errors) break;
+       }
+       //Validations
+       if (errors){
+               if (data) 
+                       free(data);
+               return usage_legic_write();
+       }
+
+       // tagtype
+       legic_card_select_t card;
+       if (legic_get_type(&card)) {
+               PrintAndLog("Failed to identify tagtype");
+               return -1;
+       }
+
+       legic_print_type(card.cardsize, 0);
+       
+       // OUT-OF-BOUNDS checks
+       // UID 4+1 bytes can't be written to.
+       if ( offset < 5 ) {
+               PrintAndLog("Out-of-bounds, bytes 0-1-2-3-4 can't be written to. Offset = %d", offset);
+               return -2;
+       }
+       
+       if ( len + offset >= card.cardsize ) {
+               PrintAndLog("Out-of-bounds, Cardsize = %d, [offset+len = %d ]", card.cardsize, len + offset);
+               return -2;
+       }
+
+       if (offset == 5 || offset == 6) {
+               PrintAndLog("############# DANGER ################");
+               PrintAndLog("# changing the DCF is irreversible  #");
+               PrintAndLog("#####################################");
+               char *answer = NULL;
+               answer = readline("do you really want to continue? y(es) n(o) : ");
+               bool overwrite = (answer[0] == 'y' || answer[0] == 'Y');
+               if (!overwrite){
+                       PrintAndLog("command cancelled");
+                       return 0;
+               }
+       }
+       
+       legic_chk_iv(&IV);
+       
+       PrintAndLog("Writing to tag");
+
+       UsbCommand c = {CMD_WRITER_LEGIC_RF, {offset, len, IV}};
+       memcpy(c.d.asBytes, data, len); 
+       UsbCommand resp;
+       clearCommandBuffer();
+       SendCommand(&c);
+       
+       if (!WaitForResponseTimeout(CMD_ACK, &resp, 2000)) {
+               PrintAndLog("command execution time out");
+               return 1;
+       }
+       uint8_t isOK = resp.arg[0] & 0xFF;
+       if ( !isOK ) {
+               PrintAndLog("failed writing tag");
+               return 1;
+       }
+
     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 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]);
-   SendCommand(&c);
-   return 0;
+int CmdLegicCalcCrc(const char *Cmd){
+
+       uint8_t *data = NULL;
+       uint8_t cmdp = 0, uidcrc = 0, type=0;
+       bool errors = false;
+       int len = 0;
+       int bg, en;
+       
+       while(param_getchar(Cmd, cmdp) != 0x00) {
+               switch(param_getchar(Cmd, cmdp)) {
+               case 'b':
+               case 'B':
+                       // peek at length of the input string so we can
+                       // figure out how many elements to malloc in "data"
+                       bg=en=0;
+                       if (param_getptr(Cmd, &bg, &en, cmdp+1)) {
+                               errors = true;
+                               break;
+                       }
+                       len = (en - bg + 1);
+
+                       // check that user entered even number of characters
+                       // for hex data string
+                       if (len & 1) {
+                               errors = true;
+                               break;
+                       }
+
+                       // it's possible for user to accidentally enter "b" parameter
+                       // more than once - we have to clean previous malloc
+                       if (data) free(data);
+                       data = malloc(len >> 1);
+                       if ( data == NULL ) {
+                               PrintAndLog("Can't allocate memory. exiting");
+                               errors = true;
+                               break;
+                       }
+                       
+                       if (param_gethex(Cmd, cmdp+1, data, len)) {
+                               errors = true;
+                               break;
+                       }
+
+                       len >>= 1;      
+                       cmdp += 2;
+                       break;
+               case 'u':
+               case 'U':                
+                       uidcrc = param_get8ex(Cmd, cmdp+1, 0, 16);
+                       cmdp += 2;
+                       break;
+               case 'c':
+               case 'C':
+                       type = param_get8ex(Cmd, cmdp+1, 0, 10);
+                       cmdp += 2;
+                       break;
+               case 'h':
+               case 'H':
+                       errors = true;
+                       break;
+               default:
+                       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
+                       errors = true;
+                       break;
+               }
+               if (errors) break;
+       }
+       //Validations
+       if (errors){
+               if (data) free(data);
+               return usage_legic_calccrc();
+       }
+       
+       switch (type){
+               case 16:
+                       PrintAndLog("Legic crc16: %X", CRC16Legic(data, len, uidcrc));
+                       break;
+               default:
+                       PrintAndLog("Legic crc8: %X",  CRC8Legic(data, len) );
+                       break;
+       }
+       
+       if (data) free(data);
+       return 0;
+} 
+
+int legic_print_type(uint32_t tagtype, uint8_t spaces){
+       char spc[11] = "          ";
+       spc[10]=0x00;
+       char *spacer = spc + (10-spaces);
+
+       if ( tagtype == 22 )    
+               PrintAndLog("%sTYPE : MIM%d card (outdated)", spacer, tagtype);
+       else if ( tagtype == 256 )
+               PrintAndLog("%sTYPE : MIM%d card (234 bytes)", spacer, tagtype);
+       else if ( tagtype == 1024 )
+               PrintAndLog("%sTYPE : MIM%d card (1002 bytes)", spacer, tagtype);
+       else
+               PrintAndLog("%sTYPE : Unknown %06x", spacer, tagtype);
+       return 0;
 }
+int legic_get_type(legic_card_select_t *card){
+
+       if ( card == NULL ) return 1;
 
-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) {
-               PrintAndLog("Please specify the offset and length as two hex strings");
-        return -1;
-    }
+       UsbCommand c = {CMD_LEGIC_INFO, {0,0,0}};
+       clearCommandBuffer();
     SendCommand(&c);
-    return 0;
+       UsbCommand resp;
+       if (!WaitForResponseTimeout(CMD_ACK, &resp, 500))
+               return 2;
+       
+       uint8_t isOK = resp.arg[0] & 0xFF;
+       if ( !isOK ) 
+               return 3;
+       
+       memcpy(card, (legic_card_select_t *)resp.d.asBytes, sizeof(legic_card_select_t));
+       return 0;
+}
+void legic_chk_iv(uint32_t *iv){
+       if ( (*iv & 0x7F) != *iv ){
+               *iv &= 0x7F;
+               PrintAndLog("Truncating IV to 7bits, %u", *iv);
+       }
+       // IV must be odd
+       if ( (*iv & 1) == 0 ){
+               *iv |= 0x01;  
+               PrintAndLog("LSB of IV must be SET %u", *iv);   
+       }
+}
+void legic_seteml(uint8_t *src, uint32_t offset, uint32_t numofbytes) {
+       size_t len = 0;
+       UsbCommand c = {CMD_LEGIC_ESET, {0, 0, 0}};     
+       for(size_t i = 0; i < numofbytes; i += USB_CMD_DATA_SIZE) {
+               
+               len = MIN((numofbytes - i), USB_CMD_DATA_SIZE);         
+               c.arg[0] = i; // offset
+               c.arg[1] = len; // number of bytes
+               memcpy(c.d.asBytes, src+i, len); 
+               clearCommandBuffer();
+               SendCommand(&c);
+       }
 }
 
-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;
- }
+int HFLegicReader(const char *Cmd, bool verbose) {
+
+       char cmdp = param_getchar(Cmd, 0);
+       if ( cmdp == 'H' || cmdp == 'h' ) return usage_legic_reader();
+       
+       legic_card_select_t card;
+       switch(legic_get_type(&card)){
+               case 1: 
+                       if ( verbose ) PrintAndLog("command execution time out"); 
+                       return 1;
+               case 2: 
+               case 3: 
+                       if ( verbose ) PrintAndLog("legic card select failed");
+                       return 2;
+               default: break;
+       }
+       PrintAndLog(" UID : %s", sprint_hex(card.uid, sizeof(card.uid)));
+       legic_print_type(card.cardsize, 0);
+       return 0;
+}
+int CmdLegicReader(const char *Cmd){
+       return HFLegicReader(Cmd, TRUE);
+}
+
+int CmdLegicDump(const char *Cmd){
+
+       FILE *f;
+       char filename[FILE_PATH_SIZE] = {0x00};
+       char *fnameptr = filename;
+       size_t fileNlen = 0;
+       bool errors = false;
+       uint16_t dumplen;       
+       uint8_t cmdp = 0;
+       
+       memset(filename, 0, sizeof(filename));
+       
+       while(param_getchar(Cmd, cmdp) != 0x00) {
+               switch(param_getchar(Cmd, cmdp)) {
+                       case 'h':
+                       case 'H':
+                               return usage_legic_dump();
+                       case 'o':
+                       case 'O':
+                               fileNlen = param_getstr(Cmd, cmdp+1, filename);
+                               if (!fileNlen) 
+                                       errors = true; 
+                               if (fileNlen > FILE_PATH_SIZE-5) 
+                                       fileNlen = FILE_PATH_SIZE-5;
+                               cmdp += 2;
+                               break;
+                       default:
+                               PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
+                               errors = true;
+                               break;
+               }
+               if(errors) break;
+       }
+
+       //Validations
+       if(errors) return usage_legic_dump();
+       
+       // tagtype
+       legic_card_select_t card;
+       if (legic_get_type(&card)) {
+               PrintAndLog("Failed to identify tagtype");
+               return -1;
+       }
+       dumplen = card.cardsize;
+       
+       legic_print_type(dumplen, 0);   
+       PrintAndLog("Reading tag memory...");
+
+       UsbCommand c = {CMD_READER_LEGIC_RF, {0x00, dumplen, 0x55}};
+       clearCommandBuffer();
+       SendCommand(&c);
+       UsbCommand resp;
+       if (!WaitForResponseTimeout(CMD_ACK, &resp, 3000)) {
+               PrintAndLog("Command execute time-out");
+               return 1;
+       }
+               
+       uint8_t isOK = resp.arg[0] & 0xFF;
+       if ( !isOK ) {
+               PrintAndLog("Failed dumping tag data");
+               return 2;
+       }
+
+       uint16_t readlen = resp.arg[1];
+       uint8_t *data = malloc(readlen);
+       if (!data) {
+               PrintAndLog("Fail, cannot allocate memory");
+               return 3;
+       }
+       memset(data, 0, readlen);
+       
+       if ( readlen != dumplen )
+               PrintAndLog("Fail, only managed to read 0x%02X bytes of 0x%02X", readlen, dumplen);
+
+       // copy data from device
+       GetEMLFromBigBuf(data, readlen, 0);
+       if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500)) {
+               PrintAndLog("Fail, transfer from device time-out");
+               free(data);
+               return 4;
+       }
+
+       // user supplied filename?
+       if (fileNlen < 1)
+               sprintf(fnameptr,"%02X%02X%02X%02X.bin", data[0], data[1], data[2], data[3]);
+       else
+               sprintf(fnameptr + fileNlen,".bin");
+
+       if ((f = fopen(filename,"wb")) == NULL) { 
+               PrintAndLog("Could not create file name %s", filename);
+               if (data)
+                       free(data);
+               return 5;
+       }
+       fwrite(data, 1, readlen, f);
+       fclose(f);
+       free(data);
+       PrintAndLog("Wrote %d bytes to %s", readlen, filename);
+       return 0;
+}      
+
+int CmdLegicRestore(const char *Cmd){
+
+       FILE *f;
+       char filename[FILE_PATH_SIZE] = {0x00};
+       char *fnameptr = filename;
+       size_t fileNlen = 0;
+       bool errors = true;
+       uint16_t numofbytes;    
+       uint8_t cmdp = 0;
+       
+       memset(filename, 0, sizeof(filename));
+       
+       while(param_getchar(Cmd, cmdp) != 0x00) {
+               switch(param_getchar(Cmd, cmdp)) {
+                       case 'h':
+                       case 'H':
+                               errors = true;
+                               break;
+                       case 'i':
+                       case 'I':
+                               fileNlen = param_getstr(Cmd, cmdp+1, filename);
+                               if (!fileNlen) 
+                                       errors = true;
+                               else 
+                                       errors = false;
+                               
+                               if (fileNlen > FILE_PATH_SIZE-5) 
+                                       fileNlen = FILE_PATH_SIZE-5;
+                               cmdp += 2;                              
+                               break;
+                       default:
+                               PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
+                               errors = true;
+                               break;
+               }
+               if (errors) break;
+       }
+
+       //Validations
+       if(errors) return usage_legic_restore();
+       
+       // tagtype
+       legic_card_select_t card;
+       if (legic_get_type(&card)) {
+               PrintAndLog("Failed to identify tagtype");
+               return 1;
+       }
+       numofbytes = card.cardsize;     
+       
+       // set up buffer
+       uint8_t *data = malloc(numofbytes);
+       if (!data) {
+               PrintAndLog("Fail, cannot allocate memory");
+               return 2;               
+       }
+       memset(data, 0, numofbytes);
+       
+       legic_print_type(numofbytes, 0);        
+
+       // set up file
+       fnameptr += fileNlen;
+       sprintf(fnameptr, ".bin");
+
+       if ((f = fopen(filename,"rb")) == NULL) {
+               PrintAndLog("File %s not found or locked", filename);
+               return 3;
+       }       
+       
+       // verify size of dumpfile is the same as card. 
+       fseek(f, 0, SEEK_END); // seek to end of file
+       size_t filesize = ftell(f); // get current file pointer
+       fseek(f, 0, SEEK_SET); // seek back to beginning of file
+       
+       if ( filesize != numofbytes) {
+               PrintAndLog("Fail, filesize and cardsize is not equal. [%u != %u]", filesize, numofbytes);
+               free(data);
+               fclose(f);
+               return 4;
+       }
+
+       // load file
+       size_t bytes_read = fread(data, 1, numofbytes, f);
+       if ( bytes_read == 0){
+               PrintAndLog("File reading error");
+               free(data);
+               fclose(f);
+               return 2;
+       }
+       fclose(f);
+
+       PrintAndLog("Restoring to card");
+
+       // transfer to device
+       size_t len = 0;
+       UsbCommand c = {CMD_WRITER_LEGIC_RF, {0, 0, 0x55}};
+       UsbCommand resp;
+       for(size_t i = 7; i < numofbytes; i += USB_CMD_DATA_SIZE) {
+               
+               len = MIN((numofbytes - i), USB_CMD_DATA_SIZE);         
+               c.arg[0] = i; // offset
+               c.arg[1] = len; // number of bytes
+               memcpy(c.d.asBytes, data+i, len); 
+               clearCommandBuffer();
+               SendCommand(&c);
+       
+               if (!WaitForResponseTimeout(CMD_ACK, &resp, 4000)) {
+                       PrintAndLog("command execution time out");
+                       free(data);     
+                       return 1;
+               }
+               uint8_t isOK = resp.arg[0] & 0xFF;
+               if ( !isOK ) {
+                       PrintAndLog("failed writing tag [msg = %u]", resp.arg[1] & 0xFF);
+                       free(data);     
+                       return 1;
+               }
+               PrintAndLog("Wrote chunk [offset %d | len %d | total %d", i, len, i+len);
+       }       
+       
+       free(data);     
+       PrintAndLog("\nWrote %d bytes to card from file %s", numofbytes, filename);
+       return 0;
+}
+
+int CmdLegicELoad(const char *Cmd) {
+       FILE * f;
+       char filename[FILE_PATH_SIZE];
+       char *fnameptr = filename;
+       int len, numofbytes;
+       int nameParamNo = 1;
+       
+       char cmdp = param_getchar(Cmd, 0);              
+       if ( cmdp == 'h' || cmdp == 'H' || cmdp == 0x00)
+               return usage_legic_eload();
+
+       switch (cmdp) {
+               case '0' : numofbytes = 22; break;
+               case '1' : 
+               case '\0': numofbytes = 256; break;
+               case '2' : numofbytes = 1024; break;
+               default  : numofbytes = 256;  nameParamNo = 0;break;
+       }
+
+       // set up buffer
+       uint8_t *data = malloc(numofbytes);
+       if (!data) {
+               PrintAndLog("Fail, cannot allocate memory");
+               return 3;               
+       }
+       memset(data, 0, numofbytes);
+       
+       // set up file
+       len = param_getstr(Cmd, nameParamNo, filename);
+       if (len > FILE_PATH_SIZE - 5) 
+               len = FILE_PATH_SIZE - 5;
+       fnameptr += len;
+       sprintf(fnameptr, ".bin");
+       
+       // open file
+       if ((f = fopen(filename,"rb")) == NULL) { 
+               PrintAndLog("File %s not found or locked", filename);
+               free(data);
+               return 1;
+       }
+
+       // load file
+       size_t bytes_read = fread(data, 1, numofbytes, f);
+       if ( bytes_read == 0){
+               PrintAndLog("File reading error");
+               free(data);
+               fclose(f);
+               return 2;
+       }
+       fclose(f);
+       
+       // transfer to device
+       legic_seteml(data, 0, numofbytes);
+               
+       free(data);     
+       PrintAndLog("\nLoaded %d bytes from file: %s  to emulator memory", numofbytes, filename);
+       return 0;
+}
+
+int CmdLegicESave(const char *Cmd) {
+       FILE *f;
+       char filename[FILE_PATH_SIZE];
+       char *fnameptr = filename;
+       int fileNlen, numofbytes, nameParamNo = 1;
+       
+       memset(filename, 0, sizeof(filename));
+
+       char cmdp = param_getchar(Cmd, 0);
+       
+       if ( cmdp == 'h' || cmdp == 'H' || cmdp == 0x00)
+               return usage_legic_esave();
+
+       switch (cmdp) {
+               case '0' : numofbytes = 22; break;
+               case '1' : 
+               case '\0': numofbytes = 256; break;
+               case '2' : numofbytes = 1024; break;
+               default  : numofbytes = 256; nameParamNo = 0; break;
+       }
+
+       fileNlen = param_getstr(Cmd, nameParamNo, filename);
+       
+       if (fileNlen > FILE_PATH_SIZE - 5) 
+               fileNlen = FILE_PATH_SIZE - 5;
+
+       // set up buffer
+       uint8_t *data = malloc(numofbytes);
+       if (!data) {
+               PrintAndLog("Fail, cannot allocate memory");
+               return 3;               
+       }
+       memset(data, 0, numofbytes);
+               
+       // download emulator memory
+       PrintAndLog("Reading emulator memory...");      
+       GetEMLFromBigBuf(data, numofbytes, 0);
+       if ( !WaitForResponseTimeout(CMD_ACK, NULL, 2500)) {
+               PrintAndLog("Fail, transfer from device time-out");
+               free(data);
+               return 4;
+       }
+
+       // user supplied filename?
+       if (fileNlen < 1)               
+               sprintf(fnameptr,"%02X%02X%02X%02X.bin", data[0], data[1], data[2], data[3]);
+       else
+               sprintf(fnameptr + fileNlen,".bin");
+       
+       // open file
+       if ((f = fopen(filename,"wb")) == NULL) { 
+               PrintAndLog("Could not create file name %s", filename);
+               free(data);
+               return 1;
+       }
+       fwrite(data, 1, numofbytes, f);
+       fclose(f);
+       free(data);
+       PrintAndLog("\nSaved %d bytes from emulator memory to file: %s", numofbytes, filename);
+       return 0;
+}
+
+int CmdLegicWipe(const char *Cmd){
+
+       char cmdp = param_getchar(Cmd, 0);
+       
+       if ( cmdp == 'h' || cmdp == 'H') return usage_legic_wipe();
+       
+       // tagtype
+       legic_card_select_t card;
+       if (legic_get_type(&card)) {
+               PrintAndLog("Failed to identify tagtype");
+               return 1;
+       }
+       
+       // set up buffer
+       uint8_t *data = malloc(card.cardsize);
+       if (!data) {
+               PrintAndLog("Fail, cannot allocate memory");
+               return 2;               
+       }
+       memset(data, 0, card.cardsize);
+       
+       legic_print_type(card.cardsize, 0);
+
+       printf("Erasing");
+       
+       // transfer to device
+       size_t len = 0;
+       UsbCommand c = {CMD_WRITER_LEGIC_RF, {0, 0, 0x55}};
+       UsbCommand resp;
+       for(size_t i = 7; i < card.cardsize; i += USB_CMD_DATA_SIZE) {
+               
+               printf(".");
+               len = MIN((card.cardsize - i), USB_CMD_DATA_SIZE);              
+               c.arg[0] = i; // offset
+               c.arg[1] = len; // number of bytes
+               memcpy(c.d.asBytes, data+i, len); 
+               clearCommandBuffer();
+               SendCommand(&c);
+       
+               if (!WaitForResponseTimeout(CMD_ACK, &resp, 4000)) {
+                       PrintAndLog("command execution time out");
+                       free(data);     
+                       return 3;
+               }
+               uint8_t isOK = resp.arg[0] & 0xFF;
+               if ( !isOK ) {
+                       PrintAndLog("failed writing tag [msg = %u]", resp.arg[1] & 0xFF);
+                       free(data);     
+                       return 4;
+               }
+       }
+       printf("ok\n");
+       return 0;
+}
+
+int CmdLegicList(const char *Cmd) {
+       CmdHFList("legic");
+       return 0;
+}
+
+static command_t CommandTable[] =  {
+       {"help",        CmdHelp,                        1, "This help"},
+       {"reader",      CmdLegicReader,         1, "LEGIC Prime Reader UID and tag info"},
+       {"info",        CmdLegicInfo,           0, "Display deobfuscated and decoded LEGIC Prime tag data"},
+       {"dump",        CmdLegicDump,           0, "Dump LEGIC Prime tag to binary file"},
+       {"restore", CmdLegicRestore,    0, "Restore a dump onto a LEGIC Prime tag"},
+       {"rdmem",       CmdLegicRdmem,          0, "Read bytes from a LEGIC Prime tag"},
+       {"sim",         CmdLegicRfSim,          0, "Start tag simulator"},
+       {"write",       CmdLegicRfWrite,        0, "Write data to a LEGIC Prime tag"},
+       {"crc",         CmdLegicCalcCrc,        1, "Calculate Legic CRC over given bytes"},     
+       {"eload",       CmdLegicELoad,          1, "Load binary dump to emulator memory"},
+       {"esave",       CmdLegicESave,          1, "Save emulator memory to binary file"},
+       {"list",        CmdLegicList,           1, "[Deprecated] List LEGIC history"},
+       {"wipe",        CmdLegicWipe,           1, "Wipe a LEGIC Prime tag"},
+       {NULL, NULL, 0, NULL}
+};
+
+int CmdHFLegic(const char *Cmd) {
+       clearCommandBuffer();
+       CmdsParse(CommandTable, Cmd);
+       return 0;
+}
 
+int CmdHelp(const char *Cmd) {
+       CmdsHelp(CommandTable);
+       return 0;
+}
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