cvs.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 "ui.h"
  14 #include "util.h"
  15 #include "graph.h"
  16 #include "cmdparser.h"
  17 #include "cmddata.h"
  18 #include "cmdmain.h"
  19 #include "cmdlf.h"
  20 #include "cmdlfviking.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 // calc checksum
  49 uint64_t getVikingBits(uint32_t id) {
  50         uint8_t checksum = (id>>24) ^ ((id>>16) & 0xFF) ^ ((id>>8) & 0xFF) ^ (id & 0xFF) ^ 0xF2 ^ 0xA8;
  51         uint64_t ret = (uint64_t)0xF2 << 56;
  52         ret |= (id << 8);
  53         ret     |= checksum;
  54         return ret;
  55 }
  56
  57 //by marshmellow
  58 //see ASKDemod for what args are accepted
  59 int CmdVikingRead(const char *Cmd) {
  60         // read lf silently
  61         CmdLFRead("s");
  62         // get samples silently
  63         getSamples("30000",false);
  64         // demod and output viking ID
  65         return CmdVikingDemod(Cmd);
  66 }
  67
  68 int CmdVikingClone(const char *Cmd) {
  69         uint32_t id = 0;
  70         uint64_t rawID = 0;
  71         bool Q5 = false;
  72         char cmdp = param_getchar(Cmd, 0);
  73         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_viking_clone();
  74
  75         id = param_get32ex(Cmd, 0, 0, 16);
  76         if (id == 0) return usage_lf_viking_clone();
  77
  78         cmdp = param_getchar(Cmd, 1);
  79         if ( cmdp == 'Q' || cmdp == 'q')
  80                 Q5 = true;
  81
  82         rawID = getVikingBits(id);
  83
  84         UsbCommand c = {CMD_VIKING_CLONE_TAG,{rawID >> 32, rawID & 0xFFFFFFFF, Q5}};
  85         clearCommandBuffer();
  86     SendCommand(&c);
  87         //check for ACK
  88         WaitForResponse(CMD_ACK,NULL);
  89     return 0;
  90 }
  91
  92 int CmdVikingSim(const char *Cmd) {
  93         uint32_t id = 0;
  94         uint64_t rawID = 0;
  95         uint8_t clk = 32, encoding = 1, separator = 0, invert = 0;
  96
  97         char cmdp = param_getchar(Cmd, 0);
  98         if (strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') return usage_lf_viking_sim();
  99
 100         id = param_get32ex(Cmd, 0, 0, 16);
 101         if (id == 0) return usage_lf_viking_sim();
 102
 103         rawID = getVikingBits(id);
 104
 105         uint16_t arg1, arg2;
 106         size_t size = 64;
 107         arg1 = clk << 8 | encoding;
 108         arg2 = invert << 8 | separator;
 109
 110         UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 111         PrintAndLog("preparing to sim ask data: %d bits", size);
 112         num_to_bytebits(rawID, 64, c.d.asBytes);
 113         clearCommandBuffer();
 114         SendCommand(&c);
 115         return 0;
 116 }
 117
 118 static command_t CommandTable[] = {
 119     {"help",    CmdHelp,                1, "This help"},
 120         {"read",        CmdVikingRead,  0, "Attempt to read and Extract tag data"},
 121         {"clone",       CmdVikingClone, 0, "<8 digit ID number> clone viking tag"},
 122         {"sim",         CmdVikingSim,   0, "<8 digit ID number> simulate viking tag"},
 123     {NULL, NULL, 0, NULL}
 124 };
 125
 126 int CmdLFViking(const char *Cmd) {
 127     CmdsParse(CommandTable, Cmd);
 128     return 0;
 129 }
 130
 131 int CmdHelp(const char *Cmd) {
 132     CmdsHelp(CommandTable);
 133     return 0;
 134 }