git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdlfviking.c

   1 //-----------------------------------------------------------------------------
   2 //
   3 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   4 // at your option, any later version. See the LICENSE.txt file for the text of
   5 // the license.
   6 //-----------------------------------------------------------------------------
   7 // Low frequency Viking tag commands (AKA FDI Matalec Transit)
   8 // ASK/Manchester, RF/32, 64 bits (complete)
   9 //-----------------------------------------------------------------------------
  10
  11 #include "cmdlfviking.h"
  12
  13 #include <stdio.h>
  14 #include <string.h>
  15 #include <inttypes.h>
  16 #include "comms.h"
  17 #include "ui.h"
  18 #include "util.h"
  19 #include "graph.h"
  20 #include "cmdparser.h"
  21 #include "cmddata.h"
  22 #include "cmdmain.h"
  23 #include "cmdlf.h"
  24 #include "lfdemod.h"
  25 static int CmdHelp(const char *Cmd);
  26
  27 int usage_lf_viking_clone(void) {
  28         PrintAndLog("clone a Viking AM tag to a T55x7 tag.");
  29         PrintAndLog("Usage: lf viking clone <Card ID - 8 hex digits> <Q5>");
  30   PrintAndLog("Options :");
  31   PrintAndLog("  <Card Number>  : 8 digit hex viking card number");
  32   PrintAndLog("  <Q5>           : specify write to Q5 (t5555 instead of t55x7)");
  33   PrintAndLog("");
  34   PrintAndLog("Sample  : lf viking clone 1A337 Q5");
  35         return 0;
  36 }
  37
  38 int usage_lf_viking_sim(void) {
  39   PrintAndLog("Enables simulation of viking card with specified card number.");
  40   PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
  41   PrintAndLog("Per viking format, the card number is 8 digit hex number.  Larger values are truncated.");
  42   PrintAndLog("");
  43   PrintAndLog("Usage:  lf viking sim <Card-Number>");
  44   PrintAndLog("Options :");
  45   PrintAndLog("  <Card Number>   : 8 digit hex viking card number");
  46   PrintAndLog("");
  47   PrintAndLog("Sample  : lf viking sim 1A337");
  48   return 0;
  49 }
  50
  51 uint64_t getVikingBits(uint32_t id) {
  52         //calc checksum
  53         uint8_t checksum = ((id>>24) & 0xFF) ^ ((id>>16) & 0xFF) ^ ((id>>8) & 0xFF) ^ (id & 0xFF) ^ 0xF2 ^ 0xA8;
  54         return ((uint64_t)0xF2 << 56) | ((uint64_t)id << 8) | checksum;
  55 }
  56
  57 //by marshmellow
  58 //see ASKDemod for what args are accepted
  59 int CmdVikingDemod(const char *Cmd) {
  60         if (!ASKDemod(Cmd, false, false, 1)) {
  61                 if (g_debugMode) PrintAndLog("ASKDemod failed");
  62                 return 0;
  63         }
  64         size_t size = DemodBufferLen;
  65         //call lfdemod.c demod for Viking
  66         int ans = VikingDemod_AM(DemodBuffer, &size);
  67         if (ans < 0) {
  68                 if (g_debugMode) PrintAndLog("Error Viking_Demod %d", ans);
  69                 return 0;
  70         }
  71         //got a good demod
  72         uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
  73         uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
  74         uint32_t cardid = bytebits_to_byte(DemodBuffer+ans+24, 32);
  75         uint8_t  checksum = bytebits_to_byte(DemodBuffer+ans+32+24, 8);
  76         PrintAndLog("Viking Tag Found: Card ID %08X, Checksum: %02X", cardid, (unsigned int) checksum);
  77         PrintAndLog("Raw: %08X%08X", raw1,raw2);
  78         setDemodBuf(DemodBuffer, 64, ans);
  79         setClockGrid(g_DemodClock, g_DemodStartIdx + (ans*g_DemodClock));
  80         return 1;
  81 }
  82
  83 //by marshmellow
  84 //see ASKDemod for what args are accepted
  85 int CmdVikingRead(const char *Cmd) {
  86         // read lf silently
  87         lf_read(true, 10000);
  88         // demod and output viking ID
  89         return CmdVikingDemod(Cmd);
  90 }
  91
  92 int CmdVikingClone(const char *Cmd) {
  93         uint32_t id = 0;
  94         uint64_t rawID = 0;
  95         bool Q5 = false;
  96         char cmdp = param_getchar(Cmd, 0);
  97         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_viking_clone();
  98
  99         id = param_get32ex(Cmd, 0, 0, 16);
 100         if (id == 0) return usage_lf_viking_clone();
 101         if (param_getchar(Cmd, 1)=='Q' || param_getchar(Cmd, 1)=='q')
 102                 Q5 = true;
 103
 104         rawID = getVikingBits(id);
 105         PrintAndLog("Cloning - ID: %08X, Raw: %08X%08X",id,(uint32_t)(rawID >> 32),(uint32_t) (rawID & 0xFFFFFFFF));
 106         UsbCommand c = {CMD_VIKING_CLONE_TAG,{rawID >> 32, rawID & 0xFFFFFFFF, Q5}};
 107         clearCommandBuffer();
 108         SendCommand(&c);
 109         //check for ACK
 110         WaitForResponse(CMD_ACK,NULL);
 111         return 0;
 112 }
 113
 114 int CmdVikingSim(const char *Cmd) {
 115         uint32_t id = 0;
 116         uint64_t rawID = 0;
 117         uint8_t clk = 32, encoding = 1, separator = 0, invert = 0;
 118         char cmdp = param_getchar(Cmd, 0);
 119
 120         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_viking_sim();
 121         id = param_get32ex(Cmd, 0, 0, 16);
 122         if (id == 0) return usage_lf_viking_sim();
 123
 124         rawID = getVikingBits(id);
 125
 126   uint16_t arg1, arg2;
 127   size_t size = 64;
 128   arg1 = clk << 8 | encoding;
 129   arg2 = invert << 8 | separator;
 130
 131   UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 132   PrintAndLog("preparing to sim ask data: %d bits", size);
 133   num_to_bytebits(rawID, 64, c.d.asBytes);
 134         clearCommandBuffer();
 135   SendCommand(&c);
 136   return 0;
 137 }
 138
 139 static command_t CommandTable[] = {
 140         {"help",  CmdHelp,        1, "This help"},
 141         {"demod", CmdVikingDemod, 1, "Demodulate a Viking tag from the GraphBuffer"},
 142         {"read",  CmdVikingRead,  0, "Attempt to read and Extract tag data from the antenna"},
 143         {"clone", CmdVikingClone, 0, "<8 digit ID number> clone viking tag"},
 144         {"sim",   CmdVikingSim,   0, "<8 digit ID number> simulate viking tag"},
 145         {NULL, NULL, 0, NULL}
 146 };
 147
 148 int CmdLFViking(const char *Cmd) {
 149         CmdsParse(CommandTable, Cmd);
 150         return 0;
 151 }
 152
 153 int CmdHelp(const char *Cmd) {
 154         CmdsHelp(CommandTable);
 155         return 0;
 156 }