git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdlfpcf7931.c

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2012 Chalk <chalk.secu at gmail.com>
   3 //               2015 Dake <thomas.cayrou at gmail.com>
   4
   5 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   6 // at your option, any later version. See the LICENSE.txt file for the text of
   7 // the license.
   8 //-----------------------------------------------------------------------------
   9 // Low frequency PCF7931 commands
  10 //-----------------------------------------------------------------------------
  11
  12 #include <stdio.h>
  13 #include <string.h>
  14 #include "proxmark3.h"
  15 #include "ui.h"
  16 #include "graph.h"
  17 #include "cmdparser.h"
  18 #include "cmddata.h"
  19 #include "cmdmain.h"
  20 #include "cmdlf.h"
  21 #include "cmdlfpcf7931.h"
  22
  23 static int CmdHelp(const char *Cmd);
  24
  25 struct pcf7931_config configPcf = {{0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF},17500,{0,0}};
  26
  27 int CmdLFPCF7931Read(const char *Cmd)
  28 {
  29   UsbCommand c = {CMD_PCF7931_READ};
  30   SendCommand(&c);
  31   UsbCommand resp;
  32   WaitForResponse(CMD_ACK,&resp);
  33   return 0;
  34 }
  35
  36 int CmdLFPCF7931Config(const char *Cmd)
  37 {
  38   int res = 0;
  39   res = sscanf(Cmd, "%02x %02x %02x %02x %02x %02x %02x %d %d %d", &configPcf.password[0], &configPcf.password[1], &configPcf.password[2], &configPcf.password[3], &configPcf.password[4], &configPcf.password[5], &configPcf.password[6], &configPcf.init_delay, &configPcf.offset[0], &configPcf.offset[1]);
  40
  41   if (res >= 7 || res < 1){
  42       if(res == 7) configPcf.init_delay = 17500; //default value
  43
  44       if(res<=8){
  45         configPcf.offset[0] = -10; //default value
  46         configPcf.offset[1] = 30; //default value
  47       }
  48
  49       if(res < 1){
  50          PrintAndLog("Usage: <password byte 1 (in hex, lsb first)> <password byte 2  (in hex, lsb first)> [...] <password byte 7  (in hex, lsb first)> <tag initialization delay (in us)> <optional : offset on the low pulses width (in us)> <optional : offset on the low pulses position (in us)>");
  51          PrintAndLog("The time offsets could be usefull to correct slew rate generated by the antenna.");
  52       }
  53
  54       PrintAndLog("Current configuration :");
  55       PrintAndLog("Password (LSB first on each byte) : %02x %02x %02x %02x %02x %02x %02x", configPcf.password[0], configPcf.password[1], configPcf.password[2], configPcf.password[3], configPcf.password[4], configPcf.password[5], configPcf.password[6]);
  56       PrintAndLog("Tag initialization delay : %d us", configPcf.init_delay);
  57       PrintAndLog("Offsets : %d us on the low pulses width, %d us on the low pulses positions", configPcf.offset[0], configPcf.offset[1]);
  58
  59       return 0;
  60   }
  61
  62   //default values
  63   configPcf.password[0] = 0xFF;
  64   configPcf.password[1] = 0xFF;
  65   configPcf.password[2] = 0xFF;
  66   configPcf.password[3] = 0xFF;
  67   configPcf.password[4] = 0xFF;
  68   configPcf.password[5] = 0xFF;
  69   configPcf.password[6] = 0xFF;
  70
  71   configPcf.init_delay = 17500;
  72   configPcf.offset[0] = 0;
  73   configPcf.offset[1] = 0;
  74
  75   PrintAndLog("Incorrect format");
  76   PrintAndLog("Examples of right usage : lf pcf7931 config 11 22 33 44 55 66 77 20000");
  77   PrintAndLog("                          lf pcf7931 config FF FF FF FF FF FF FF 17500 -10 30");
  78   return 0;
  79 }
  80
  81
  82
  83 int CmdLFPCF7931Write(const char *Cmd)
  84 {
  85   UsbCommand c = {CMD_PCF7931_WRITE};
  86
  87   int res = 0;
  88   res = sscanf(Cmd, "%x %x %x", &c.arg[0], &c.arg[1], &c.arg[2]);
  89
  90   if(res < 1) {
  91       PrintAndLog("Please specify the block address in hex");
  92       return 0;
  93   }
  94   if (res == 1){
  95     PrintAndLog("Please specify the byte address in hex");
  96      return 0;
  97   }
  98   if(res == 2) {
  99     PrintAndLog("Please specify the data in hex (1 byte)");
 100      return 0;
 101   }
 102   if(res == 3) {
 103     uint8_t n=0;
 104     for(n=0;n<7;n++)  c.d.asDwords[n] = configPcf.password[n];
 105     c.d.asDwords[7] = (configPcf.offset[0]+128);
 106     c.d.asDwords[8] = (configPcf.offset[1]+128);
 107     c.d.asDwords[9] = configPcf.init_delay;
 108     SendCommand(&c);
 109     return 0;
 110   }
 111
 112   PrintAndLog("INCORRECT FORMAT");
 113   return 0;
 114 }
 115
 116
 117 static command_t CommandTable[] =
 118 {
 119   {"help", CmdHelp, 1, "This help"},
 120   {"read", CmdLFPCF7931Read, 1, "Read content of a PCF7931 transponder"},
 121   {"write", CmdLFPCF7931Write, 1, "Write data on a PCF7931 transponder. Usage : lf pcf7931 write <bloc address> <byte address> <data>"},
 122    {"config", CmdLFPCF7931Config, 1, "Configure the password, the tags initialization delay and time offsets (optional)"},
 123   {NULL, NULL, 0, NULL}
 124 };
 125
 126 int CmdLFPCF7931(const char *Cmd)
 127 {
 128   CmdsParse(CommandTable, Cmd);
 129   return 0;
 130 }
 131
 132 int CmdHelp(const char *Cmd)
 133 {
 134   CmdsHelp(CommandTable);
 135   return 0;
 136 }