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 //could be moved to a viking file
  55 //by marshmellow
  56 //see ASKDemod for what args are accepted
  57 int CmdVikingDemod(const char *Cmd) {
  58         if (!ASKDemod(Cmd, false, false, 1)) {
  59                 if (g_debugMode) PrintAndLog("ASKDemod failed");
  60                 return 0;
  61         }
  62         size_t size = DemodBufferLen;
  63         //call lfdemod.c demod for Viking
  64         int ans = VikingDemod_AM(DemodBuffer, &size);
  65         if (ans < 0) {
  66                 if (g_debugMode) PrintAndLog("Error Viking_Demod %d", ans);
  67                 return 0;
  68         }
  69         //got a good demod
  70         uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
  71         uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
  72         uint32_t cardid = bytebits_to_byte(DemodBuffer+ans+24, 32);
  73         uint8_t  checksum = bytebits_to_byte(DemodBuffer+ans+32+24, 8);
  74         PrintAndLog("Viking Tag Found: Card ID %08X, Checksum: %02X", cardid, (unsigned int) checksum);
  75         PrintAndLog("Raw: %08X%08X", raw1,raw2);
  76         setDemodBuf(DemodBuffer+ans, 64, 0);
  77         return 1;
  78 }
  79
  80 //by marshmellow
  81 //see ASKDemod for what args are accepted
  82 int CmdVikingRead(const char *Cmd) {
  83         // read lf silently
  84         CmdLFRead("s");
  85         // get samples silently
  86         getSamples("10000",false);
  87         // demod and output viking ID
  88         return CmdVikingDemod(Cmd);
  89 }
  90
  91 int CmdVikingClone(const char *Cmd) {
  92         uint32_t id = 0;
  93         uint64_t rawID = 0;
  94         bool Q5 = false;
  95         char cmdp = param_getchar(Cmd, 0);
  96         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_viking_clone();
  97
  98         id = param_get32ex(Cmd, 0, 0, 16);
  99         if (id == 0) return usage_lf_viking_clone();
 100         if (param_getchar(Cmd, 1)=='Q' || param_getchar(Cmd, 1)=='q')
 101                 Q5 = true;
 102
 103         rawID = getVikingBits(id);
 104         PrintAndLog("Cloning - ID: %08X, Raw: %08X%08X",id,(uint32_t)(rawID >> 32),(uint32_t) (rawID & 0xFFFFFFFF));
 105         UsbCommand c = {CMD_VIKING_CLONE_TAG,{rawID >> 32, rawID & 0xFFFFFFFF, Q5}};
 106         clearCommandBuffer();
 107         SendCommand(&c);
 108         //check for ACK
 109         WaitForResponse(CMD_ACK,NULL);
 110         return 0;
 111 }
 112
 113 int CmdVikingSim(const char *Cmd) {
 114         uint32_t id = 0;
 115         uint64_t rawID = 0;
 116         uint8_t clk = 32, encoding = 1, separator = 0, invert = 0;
 117         char cmdp = param_getchar(Cmd, 0);
 118
 119         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_viking_sim();
 120         id = param_get32ex(Cmd, 0, 0, 16);
 121         if (id == 0) return usage_lf_viking_sim();
 122
 123         rawID = getVikingBits(id);
 124
 125   uint16_t arg1, arg2;
 126   size_t size = 64;
 127   arg1 = clk << 8 | encoding;
 128   arg2 = invert << 8 | separator;
 129
 130   UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 131   PrintAndLog("preparing to sim ask data: %d bits", size);
 132   num_to_bytebits(rawID, 64, c.d.asBytes);
 133         clearCommandBuffer();
 134   SendCommand(&c);
 135   return 0;
 136 }
 137
 138 static command_t CommandTable[] = {
 139         {"help",  CmdHelp,        1, "This help"},
 140         {"demod", CmdVikingDemod, 1, "Demodulate a Viking tag from the GraphBuffer"},
 141         {"read",  CmdVikingRead,  0, "Attempt to read and Extract tag data from the antenna"},
 142         {"clone", CmdVikingClone, 0, "<8 digit ID number> clone viking tag"},
 143         {"sim",   CmdVikingSim,   0, "<8 digit ID number> simulate viking tag"},
 144         {NULL, NULL, 0, NULL}
 145 };
 146
 147 int CmdLFViking(const char *Cmd) {
 148         CmdsParse(CommandTable, Cmd);
 149         return 0;
 150 }
 151
 152 int CmdHelp(const char *Cmd) {
 153         CmdsHelp(CommandTable);
 154         return 0;
 155 }