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
   8 //-----------------------------------------------------------------------------
   9 #include <stdio.h>
  10 #include <string.h>
  11 #include <inttypes.h>
  12 #include "proxmark3.h"
  13 #include "cmdlfviking.h"
  14 #include "ui.h"
  15 #include "util.h"
  16 #include "graph.h"
  17 #include "cmdparser.h"
  18 #include "cmddata.h"
  19 #include "cmdmain.h"
  20 #include "cmdlf.h"
  21 #include "lfdemod.h"
  22 static int CmdHelp(const char *Cmd);
  23
  24 int usage_lf_viking_clone(void) {
  25         PrintAndLog("clone a Viking AM tag to a T55x7 tag.");
  26         PrintAndLog("Usage: lf viking clone <Card ID - 8 hex digits> <Q5>");
  27   PrintAndLog("Options :");
  28   PrintAndLog("  <Card Number>  : 8 digit hex viking card number");
  29   PrintAndLog("  <Q5>           : specify write to Q5 (t5555 instead of t55x7)");
  30   PrintAndLog("");
  31   PrintAndLog("Sample  : lf viking clone 1A337 Q5");
  32         return 0;
  33 }
  34
  35 int usage_lf_viking_sim(void) {
  36   PrintAndLog("Enables simulation of viking card with specified card number.");
  37   PrintAndLog("Simulation runs until the button is pressed or another USB command is issued.");
  38   PrintAndLog("Per viking format, the card number is 8 digit hex number.  Larger values are truncated.");
  39   PrintAndLog("");
  40   PrintAndLog("Usage:  lf viking sim <Card-Number>");
  41   PrintAndLog("Options :");
  42   PrintAndLog("  <Card Number>   : 8 digit hex viking card number");
  43   PrintAndLog("");
  44   PrintAndLog("Sample  : lf viking sim 1A337");
  45   return 0;
  46 }
  47
  48 uint64_t getVikingBits(uint32_t id) {
  49         //calc checksum
  50         uint8_t checksum = ((id>>24) & 0xFF) ^ ((id>>16) & 0xFF) ^ ((id>>8) & 0xFF) ^ (id & 0xFF) ^ 0xF2 ^ 0xA8;
  51         return ((uint64_t)0xF2 << 56) | ((uint64_t)id << 8) | checksum;
  52 }
  53
  54 //by marshmellow
  55 //see ASKDemod for what args are accepted
  56 int CmdVikingDemod(const char *Cmd) {
  57         if (!ASKDemod(Cmd, false, false, 1)) {
  58                 if (g_debugMode) PrintAndLog("ASKDemod failed");
  59                 return 0;
  60         }
  61         size_t size = DemodBufferLen;
  62         //call lfdemod.c demod for Viking
  63         int ans = VikingDemod_AM(DemodBuffer, &size);
  64         if (ans < 0) {
  65                 if (g_debugMode) PrintAndLog("Error Viking_Demod %d", ans);
  66                 return 0;
  67         }
  68         //got a good demod
  69         uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
  70         uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
  71         uint32_t cardid = bytebits_to_byte(DemodBuffer+ans+24, 32);
  72         uint8_t  checksum = bytebits_to_byte(DemodBuffer+ans+32+24, 8);
  73         PrintAndLog("Viking Tag Found: Card ID %08X, Checksum: %02X", cardid, (unsigned int) checksum);
  74         PrintAndLog("Raw: %08X%08X", raw1,raw2);
  75         setDemodBuf(DemodBuffer+ans, 64, 0);
  76         return 1;
  77 }
  78
  79 //by marshmellow
  80 //see ASKDemod for what args are accepted
  81 int CmdVikingRead(const char *Cmd) {
  82         // read lf silently
  83         CmdLFRead("s");
  84         // get samples silently
  85         getSamples("10000",false);
  86         // demod and output viking ID
  87         return CmdVikingDemod(Cmd);
  88 }
  89
  90 int CmdVikingClone(const char *Cmd) {
  91         uint32_t id = 0;
  92         uint64_t rawID = 0;
  93         bool Q5 = false;
  94         char cmdp = param_getchar(Cmd, 0);
  95         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_viking_clone();
  96
  97         id = param_get32ex(Cmd, 0, 0, 16);
  98         if (id == 0) return usage_lf_viking_clone();
  99         if (param_getchar(Cmd, 1)=='Q' || param_getchar(Cmd, 1)=='q')
 100                 Q5 = true;
 101
 102         rawID = getVikingBits(id);
 103         PrintAndLog("Cloning - ID: %08X, Raw: %08X%08X",id,(uint32_t)(rawID >> 32),(uint32_t) (rawID & 0xFFFFFFFF));
 104         UsbCommand c = {CMD_VIKING_CLONE_TAG,{rawID >> 32, rawID & 0xFFFFFFFF, Q5}};
 105         clearCommandBuffer();
 106         SendCommand(&c);
 107         //check for ACK
 108         WaitForResponse(CMD_ACK,NULL);
 109         return 0;
 110 }
 111
 112 int CmdVikingSim(const char *Cmd) {
 113         uint32_t id = 0;
 114         uint64_t rawID = 0;
 115         uint8_t clk = 32, encoding = 1, separator = 0, invert = 0;
 116         char cmdp = param_getchar(Cmd, 0);
 117
 118         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_viking_sim();
 119         id = param_get32ex(Cmd, 0, 0, 16);
 120         if (id == 0) return usage_lf_viking_sim();
 121
 122         rawID = getVikingBits(id);
 123
 124   uint16_t arg1, arg2;
 125   size_t size = 64;
 126   arg1 = clk << 8 | encoding;
 127   arg2 = invert << 8 | separator;
 128
 129   UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 130   PrintAndLog("preparing to sim ask data: %d bits", size);
 131   num_to_bytebits(rawID, 64, c.d.asBytes);
 132         clearCommandBuffer();
 133   SendCommand(&c);
 134   return 0;
 135 }
 136
 137 static command_t CommandTable[] = {
 138         {"help",  CmdHelp,        1, "This help"},
 139         {"demod", CmdVikingDemod, 1, "Demodulate a Viking tag from the GraphBuffer"},
 140         {"read",  CmdVikingRead,  0, "Attempt to read and Extract tag data from the antenna"},
 141         {"clone", CmdVikingClone, 0, "<8 digit ID number> clone viking tag"},
 142         {"sim",   CmdVikingSim,   0, "<8 digit ID number> simulate viking tag"},
 143         {NULL, NULL, 0, NULL}
 144 };
 145
 146 int CmdLFViking(const char *Cmd) {
 147         CmdsParse(CommandTable, Cmd);
 148         return 0;
 149 }
 150
 151 int CmdHelp(const char *Cmd) {
 152         CmdsHelp(CommandTable);
 153         return 0;
 154 }