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 "cmdlfpcf7931.h"
  13
  14 #include <stdio.h>
  15 #include <string.h>
  16 #include "comms.h"
  17 #include "ui.h"
  18 #include "util.h"
  19 #include "graph.h"
  20 #include "cmdparser.h"
  21 #include "cmddata.h"
  22 #include "cmdmain.h"
  23 #include "cmdlf.h"
  24
  25 static int CmdHelp(const char *Cmd);
  26
  27 #define PCF7931_DEFAULT_INITDELAY 17500
  28 #define PCF7931_DEFAULT_OFFSET_WIDTH 0
  29 #define PCF7931_DEFAULT_OFFSET_POSITION 0
  30
  31 // Default values - Configuration
  32 struct pcf7931_config configPcf = {
  33         {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF},
  34         PCF7931_DEFAULT_INITDELAY,
  35         PCF7931_DEFAULT_OFFSET_WIDTH,
  36         PCF7931_DEFAULT_OFFSET_POSITION
  37         };
  38
  39 // Resets the configuration settings to default values.
  40 int pcf7931_resetConfig(){
  41         memset(configPcf.Pwd, 0xFF, sizeof(configPcf.Pwd) );
  42         configPcf.InitDelay = PCF7931_DEFAULT_INITDELAY;
  43         configPcf.OffsetWidth = PCF7931_DEFAULT_OFFSET_WIDTH;
  44         configPcf.OffsetPosition = PCF7931_DEFAULT_OFFSET_POSITION;
  45         return 0;
  46 }
  47
  48 int pcf7931_printConfig(){
  49         PrintAndLog("Password (LSB first on bytes) : %s", sprint_hex( configPcf.Pwd, sizeof(configPcf.Pwd)));
  50         PrintAndLog("Tag initialization delay      : %d us", configPcf.InitDelay);
  51         PrintAndLog("Offset low pulses width       : %d us", configPcf.OffsetWidth);
  52         PrintAndLog("Offset low pulses position    : %d us", configPcf.OffsetPosition);
  53         return 0;
  54 }
  55
  56 int usage_pcf7931_read(){
  57         PrintAndLog("Usage: lf pcf7931 read [h] ");
  58         PrintAndLog("This command tries to read a PCF7931 tag.");
  59         PrintAndLog("Options:");
  60         PrintAndLog("       h   This help");
  61         PrintAndLog("Examples:");
  62         PrintAndLog("      lf pcf7931 read");
  63         return 0;
  64 }
  65
  66 int usage_pcf7931_write(){
  67         PrintAndLog("Usage: lf pcf7931 write [h] <block address> <byte address> <data>");
  68         PrintAndLog("This command tries to write a PCF7931 tag.");
  69         PrintAndLog("Options:");
  70         PrintAndLog("       h          This help");
  71         PrintAndLog("       blockaddress   Block to save [0-7]");
  72         PrintAndLog("       byteaddress    Index of byte inside block to write [0-15]");
  73         PrintAndLog("       data           one byte of data (hex)");
  74         PrintAndLog("Examples:");
  75         PrintAndLog("      lf pcf7931 write 2 1 FF");
  76         return 0;
  77 }
  78
  79 int usage_pcf7931_config(){
  80         PrintAndLog("Usage: lf pcf7931 config [h] [r] <pwd> <delay> <offset width> <offset position>");
  81         PrintAndLog("This command tries to set the configuration used with PCF7931 commands");
  82         PrintAndLog("The time offsets could be useful to correct slew rate generated by the antenna");
  83         PrintAndLog("Caling without some parameter will print the current configuration.");
  84         PrintAndLog("Options:");
  85         PrintAndLog("       h       This help");
  86         PrintAndLog("       r       Reset configuration to default values");
  87         PrintAndLog("       pwd     Password, hex, 7bytes, LSB-order");
  88         PrintAndLog("       delay   Tag initialization delay (in us) decimal");
  89         PrintAndLog("       offset  Low pulses width (in us) decimal");
  90         PrintAndLog("       offset  Low pulses position (in us) decimal");
  91         PrintAndLog("Examples:");
  92         PrintAndLog("      lf pcf7931 config");
  93         PrintAndLog("      lf pcf7931 config r");
  94         PrintAndLog("      lf pcf7931 config 11223344556677 20000");
  95         PrintAndLog("      lf pcf7931 config 11223344556677 17500 -10 30");
  96         return 0;
  97 }
  98
  99 int CmdLFPCF7931Read(const char *Cmd){
 100
 101         uint8_t ctmp = param_getchar(Cmd, 0);
 102         if ( ctmp == 'H' || ctmp == 'h' ) return usage_pcf7931_read();
 103
 104         UsbCommand resp;
 105         UsbCommand c = {CMD_PCF7931_READ, {0, 0, 0}};
 106         clearCommandBuffer();
 107         SendCommand(&c);
 108         if ( !WaitForResponseTimeout(CMD_ACK, &resp, 2500) ) {
 109                 PrintAndLog("command execution time out");
 110                 return 1;
 111         }
 112         return 0;
 113 }
 114
 115 int CmdLFPCF7931Config(const char *Cmd){
 116
 117         uint8_t ctmp = param_getchar(Cmd, 0);
 118         if ( ctmp == 0) return pcf7931_printConfig();
 119         if ( ctmp == 'H' || ctmp == 'h' ) return usage_pcf7931_config();
 120         if ( ctmp == 'R' || ctmp == 'r' ) return pcf7931_resetConfig();
 121
 122         if ( param_gethex(Cmd, 0, configPcf.Pwd, 14) ) return usage_pcf7931_config();
 123
 124         configPcf.InitDelay = (param_get32ex(Cmd,1,0,10) & 0xFFFF);
 125         configPcf.OffsetWidth = (int)(param_get32ex(Cmd,2,0,10) & 0xFFFF);
 126         configPcf.OffsetPosition = (int)(param_get32ex(Cmd,3,0,10) & 0xFFFF);
 127
 128         pcf7931_printConfig();
 129         return 0;
 130 }
 131
 132 int CmdLFPCF7931Write(const char *Cmd){
 133
 134         uint8_t ctmp = param_getchar(Cmd, 0);
 135         if (strlen(Cmd) < 1 || ctmp == 'h' || ctmp == 'H') return usage_pcf7931_write();
 136
 137         uint8_t block = 0, bytepos = 0, data = 0;
 138
 139         if ( param_getdec(Cmd, 0, &block) ) return usage_pcf7931_write();
 140         if ( param_getdec(Cmd, 1, &bytepos) ) return usage_pcf7931_write();
 141
 142         if ( (block > 7) || (bytepos > 15) ) return usage_pcf7931_write();
 143
 144         data  = param_get8ex(Cmd, 2, 0, 16);
 145
 146         PrintAndLog("Writing block: %d", block);
 147         PrintAndLog("          pos: %d", bytepos);
 148         PrintAndLog("         data: 0x%02X", data);
 149
 150         UsbCommand c = {CMD_PCF7931_WRITE, { block, bytepos, data} };
 151         memcpy(c.d.asDwords, configPcf.Pwd, sizeof(configPcf.Pwd) );
 152           c.d.asDwords[7] = (configPcf.OffsetWidth + 128);
 153           c.d.asDwords[8] = (configPcf.OffsetPosition + 128);
 154           c.d.asDwords[9] = configPcf.InitDelay;
 155
 156         clearCommandBuffer();
 157         SendCommand(&c);
 158         //no ack?
 159         return 0;
 160 }
 161
 162 static command_t CommandTable[] =
 163 {
 164         {"help",   CmdHelp,            1, "This help"},
 165         {"read",   CmdLFPCF7931Read,   0, "Read content of a PCF7931 transponder"},
 166         {"write",  CmdLFPCF7931Write,  0, "Write data on a PCF7931 transponder."},
 167         {"config", CmdLFPCF7931Config, 1, "Configure the password, the tags initialization delay and time offsets (optional)"},
 168         {NULL,     NULL,               0, NULL}
 169 };
 170
 171 int CmdLFPCF7931(const char *Cmd)
 172 {
 173         CmdsParse(CommandTable, Cmd);
 174         return 0;
 175 }
 176
 177 int CmdHelp(const char *Cmd)
 178 {
 179         CmdsHelp(CommandTable);
 180         return 0;
 181 }