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 #include <stdio.h>
  12 #include <string.h>
  13 #include "proxmark3.h"
  14 #include "ui.h"
  15 #include "graph.h"
  16 #include "cmdparser.h"
  17 #include "cmddata.h"
  18 #include "cmdmain.h"
  19 #include "cmdlf.h"
  20 #include "cmdlfpcf7931.h"
  21
  22 static int CmdHelp(const char *Cmd);
  23
  24 #define PCF7931_DEFAULT_INITDELAY 17500
  25 #define PCF7931_DEFAULT_OFFSET_WIDTH 0
  26 #define PCF7931_DEFAULT_OFFSET_POSITION 0
  27
  28 // Default values - Configuration
  29 struct pcf7931_config configPcf = {
  30         {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF},
  31         PCF7931_DEFAULT_INITDELAY,
  32         PCF7931_DEFAULT_OFFSET_WIDTH,
  33         PCF7931_DEFAULT_OFFSET_POSITION
  34         };
  35
  36 // Resets the configuration settings to default values.
  37 int pcf7931_resetConfig(){
  38         memset(configPcf.Pwd, 0xFF, sizeof(configPcf.Pwd) );
  39         configPcf.InitDelay = PCF7931_DEFAULT_INITDELAY;
  40         configPcf.OffsetWidth = PCF7931_DEFAULT_OFFSET_WIDTH;
  41         configPcf.OffsetPosition = PCF7931_DEFAULT_OFFSET_POSITION;
  42         return 0;
  43 }
  44
  45 int pcf7931_printConfig(){
  46         PrintAndLog("Password (LSB first on bytes) : %s", sprint_hex( configPcf.Pwd, sizeof(configPcf.Pwd)));
  47         PrintAndLog("Tag initialization delay      : %d us", configPcf.InitDelay);
  48         PrintAndLog("Offset low pulses width       : %d us", configPcf.OffsetWidth);
  49         PrintAndLog("Offset low pulses position    : %d us", configPcf.OffsetPosition);
  50         return 0;
  51 }
  52
  53 int usage_pcf7931_read(){
  54         PrintAndLog("Usage: lf pcf7931 read [h] ");
  55         PrintAndLog("This command tries to read a PCF7931 tag.");
  56         PrintAndLog("Options:");
  57         PrintAndLog("       h   This help");
  58         PrintAndLog("Examples:");
  59         PrintAndLog("      lf pcf7931 read");
  60         return 0;
  61 }
  62
  63 int usage_pcf7931_write(){
  64         PrintAndLog("Usage: lf pcf7931 write [h] <block address> <byte address> <data>");
  65         PrintAndLog("This command tries to write a PCF7931 tag.");
  66         PrintAndLog("Options:");
  67         PrintAndLog("       h                      This help");
  68         PrintAndLog("       blockaddress   Block to save [0-7]");
  69         PrintAndLog("       byteaddress    Index of byte inside block to write [0-3]");
  70         PrintAndLog("       data           one byte of data (hex)");
  71         PrintAndLog("Examples:");
  72         PrintAndLog("      lf pcf7931 write 2 1 FF");
  73         return 0;
  74 }
  75
  76 int usage_pcf7931_config(){
  77         PrintAndLog("Usage: lf pcf7931 config [h] [r] <pwd> <delay> <offset width> <offset position>");
  78         PrintAndLog("This command tries to set the configuration used with PCF7931 commands");
  79         PrintAndLog("The time offsets could be useful to correct slew rate generated by the antenna");
  80         PrintAndLog("Caling without some parameter will print the current configuration.");
  81         PrintAndLog("Options:");
  82         PrintAndLog("       h       This help");
  83         PrintAndLog("       r       Reset configuration to default values");
  84         PrintAndLog("       pwd     Password, hex, 7bytes, LSB-order");
  85         PrintAndLog("       delay   Tag initialization delay (in us) decimal");
  86         PrintAndLog("       offset  Low pulses width (in us) decimal");
  87         PrintAndLog("       offset  Low pulses position (in us) decimal");
  88         PrintAndLog("Examples:");
  89         PrintAndLog("      lf pcf7931 config");
  90         PrintAndLog("      lf pcf7931 config r");
  91         PrintAndLog("      lf pcf7931 config 11223344556677 20000");
  92         PrintAndLog("      lf pcf7931 config 11223344556677 17500 -10 30");
  93         return 0;
  94 }
  95
  96 int CmdLFPCF7931Read(const char *Cmd){
  97
  98         uint8_t ctmp = param_getchar(Cmd, 0);
  99         if ( ctmp == 'H' || ctmp == 'h' ) return usage_pcf7931_read();
 100
 101         UsbCommand resp;
 102         UsbCommand c = {CMD_PCF7931_READ, {0, 0, 0}};
 103         clearCommandBuffer();
 104         SendCommand(&c);
 105         if ( !WaitForResponseTimeout(CMD_ACK, &resp, 2500) ) {
 106                 PrintAndLog("command execution time out");
 107                 return 1;
 108         }
 109         return 0;
 110 }
 111
 112 int CmdLFPCF7931Config(const char *Cmd){
 113
 114         uint8_t ctmp = param_getchar(Cmd, 0);
 115         if ( ctmp == 0) return pcf7931_printConfig();
 116         if ( ctmp == 'H' || ctmp == 'h' ) return usage_pcf7931_config();
 117         if ( ctmp == 'R' || ctmp == 'r' ) return pcf7931_resetConfig();
 118
 119         if ( param_gethex(Cmd, 0, configPcf.Pwd, 14) ) return usage_pcf7931_config();
 120
 121         configPcf.InitDelay = (param_get32ex(Cmd,1,0,10) & 0xFFFF);
 122         configPcf.OffsetWidth = (int)(param_get32ex(Cmd,2,0,10) & 0xFFFF);
 123         configPcf.OffsetPosition = (int)(param_get32ex(Cmd,3,0,10) & 0xFFFF);
 124
 125         pcf7931_printConfig();
 126         return 0;
 127 }
 128
 129 int CmdLFPCF7931Write(const char *Cmd){
 130
 131         uint8_t ctmp = param_getchar(Cmd, 0);
 132         if (strlen(Cmd) < 1 || ctmp == 'h' || ctmp == 'H') return usage_pcf7931_write();
 133
 134         uint8_t block = 0, bytepos = 0, data = 0;
 135
 136         if ( param_getdec(Cmd, 0, &block) ) return usage_pcf7931_write();
 137         if ( param_getdec(Cmd, 1, &bytepos) ) return usage_pcf7931_write();
 138
 139         if ( (block > 7) || (bytepos > 3) ) return usage_pcf7931_write();
 140
 141         data    = param_get8ex(Cmd, 2, 0, 16);
 142
 143         PrintAndLog("Writing block: %d", block);
 144         PrintAndLog("          pos: %d", bytepos);
 145         PrintAndLog("         data: 0x%02X", data);
 146
 147         UsbCommand c = {CMD_PCF7931_WRITE, { block, bytepos, data} };
 148         memcpy(c.d.asDwords, configPcf.Pwd, sizeof(configPcf.Pwd) );
 149     c.d.asDwords[7] = (configPcf.OffsetWidth + 128);
 150     c.d.asDwords[8] = (configPcf.OffsetPosition + 128);
 151     c.d.asDwords[9] = configPcf.InitDelay;
 152
 153         clearCommandBuffer();
 154         SendCommand(&c);
 155         //no ack?
 156         return 0;
 157 }
 158
 159 static command_t CommandTable[] =
 160 {
 161         {"help",        CmdHelp,                        1, "This help"},
 162         {"read",        CmdLFPCF7931Read,       1, "Read content of a PCF7931 transponder"},
 163         {"write",       CmdLFPCF7931Write,      1, "Write data on a PCF7931 transponder."},
 164         {"config",      CmdLFPCF7931Config, 1, "Configure the password, the tags initialization delay and time offsets (optional)"},
 165         {NULL, NULL, 0, NULL}
 166 };
 167
 168 int CmdLFPCF7931(const char *Cmd)
 169 {
 170         CmdsParse(CommandTable, Cmd);
 171         return 0;
 172 }
 173
 174 int CmdHelp(const char *Cmd)
 175 {
 176         CmdsHelp(CommandTable);
 177         return 0;
 178 }