ADD: added @marshmellow42 's print statement for "lf viking clone".

[proxmark3-svn] / client / cmdhflegic.c

diff --git a/client/cmdhflegic.c b/client/cmdhflegic.c
index e2229a730475ef22344bb50a88849cd9d42e9362..2d198820713e5252261a7b6e23c6db9bdb8d063a 100644 (file)
--- a/client/cmdhflegic.c
+++ b/client/cmdhflegic.c
@@ -1,37 +1,349 @@
+//-----------------------------------------------------------------------------
+// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// High frequency Legic commands
+//-----------------------------------------------------------------------------
+

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

-#include "proxusb.h"
+#include "proxmark3.h"
+#include "data.h"
+#include "ui.h"

 #include "cmdparser.h"
 #include "cmdhflegic.h"
 #include "cmdparser.h"
 #include "cmdhflegic.h"

-
+#include "cmdmain.h"
+#include "util.h"

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

-int CmdLegicRFRead(const char *Cmd)
+/*
+ *  Output BigBuf and deobfuscate LEGIC RF tag data.
+ *   This is based on information given in the talk held
+ *  by Henryk Ploetz and Karsten Nohl at 26c3
+ */
+int CmdLegicDecode(const char *Cmd)

 {
 {

-  int byte_count=0,offset=0;
-  sscanf(Cmd, "%i %i", &offset, &byte_count);
-  if(byte_count == 0) byte_count = 256;
-  if(byte_count + offset > 256) byte_count = 256 - offset;
-  UsbCommand c={CMD_READER_LEGIC_RF, {offset, byte_count, 0}};
-  SendCommand(&c);
-  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[3076]; // 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("%s", sprint_hex(data_buf+9, 13));
+       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;
+
+       } // end for loop
+       return 0;

 }
 
 }
 

-static command_t CommandTable[] = 
-{
-  {"help",        CmdHelp,        1, "This help"},
-  {"reader",      CmdLegicRFRead, 0, "[offset [length]] -- read bytes from a LEGIC card"},
-  {NULL, NULL, 0, NULL}
-};
+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;

 
 

-int CmdHFLegic(const char *Cmd)
-{
-  CmdsParse(CommandTable, Cmd);
-  return 0;
+       UsbCommand c= {CMD_READER_LEGIC_RF, {offset, byte_count, 0}};
+       clearCommandBuffer();
+       SendCommand(&c);
+       return 0;

 }
 
 }
 

-int CmdHelp(const char *Cmd)
-{
-  CmdsHelp(CommandTable);
-  return 0;
+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' || cmdp == 0x00) {
+               PrintAndLog("It loads datasamples from the file `filename` to device memory");
+               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; 
+       uint32_t data[8] = {0x00};
+       
+    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}};
+               memcpy(c.d.asBytes, data, 8);
+               clearCommandBuffer();
+        SendCommand(&c);
+        WaitForResponse(CMD_ACK, NULL);
+        offset += 8;
+    }
+    fclose(f);
+    PrintAndLog("loaded %u samples", offset);
+    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] = {0x00};
+
+       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 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) {
+    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;
+    }
+       clearCommandBuffer();
+    SendCommand(&c);
+    return 0;
+}
+
+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);
+       }
+       clearCommandBuffer();
+    SendCommand(&cmd);
+    return 0;
+ }
+
+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}
+};
+
+int CmdHFLegic(const char *Cmd) {
+       clearCommandBuffer();
+       CmdsParse(CommandTable, Cmd);
+       return 0;
+}
+
+int CmdHelp(const char *Cmd) {
+       CmdsHelp(CommandTable);
+       return 0;
+}
\ No newline at end of file