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https://github.com/Proxmark/proxmark3.git
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137 lines
4.5 KiB
C
137 lines
4.5 KiB
C
//-----------------------------------------------------------------------------
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// Copyright (C) 2012 Chalk <chalk.secu at gmail.com>
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// 2015 Dake <thomas.cayrou at gmail.com>
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// This code is licensed to you under the terms of the GNU GPL, version 2 or,
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// at your option, any later version. See the LICENSE.txt file for the text of
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// the license.
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//-----------------------------------------------------------------------------
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// Low frequency PCF7931 commands
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//-----------------------------------------------------------------------------
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#include <stdio.h>
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#include <string.h>
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#include "proxmark3.h"
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#include "ui.h"
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#include "graph.h"
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#include "cmdparser.h"
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#include "cmddata.h"
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#include "cmdmain.h"
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#include "cmdlf.h"
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#include "cmdlfpcf7931.h"
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static int CmdHelp(const char *Cmd);
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struct pcf7931_config configPcf = {{0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF},17500,{0,0}};
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int CmdLFPCF7931Read(const char *Cmd)
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{
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UsbCommand c = {CMD_PCF7931_READ};
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SendCommand(&c);
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UsbCommand resp;
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WaitForResponse(CMD_ACK,&resp);
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return 0;
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}
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int CmdLFPCF7931Config(const char *Cmd)
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{
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int res = 0;
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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]);
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if (res >= 7 || res < 1){
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if(res == 7) configPcf.init_delay = 17500; //default value
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if(res<=8){
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configPcf.offset[0] = -10; //default value
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configPcf.offset[1] = 30; //default value
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}
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if(res < 1){
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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)>");
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PrintAndLog("The time offsets could be usefull to correct slew rate generated by the antenna.");
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}
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PrintAndLog("Current configuration :");
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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]);
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PrintAndLog("Tag initialization delay : %d us", configPcf.init_delay);
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PrintAndLog("Offsets : %d us on the low pulses width, %d us on the low pulses positions", configPcf.offset[0], configPcf.offset[1]);
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return 0;
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}
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//default values
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configPcf.password[0] = 0xFF;
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configPcf.password[1] = 0xFF;
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configPcf.password[2] = 0xFF;
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configPcf.password[3] = 0xFF;
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configPcf.password[4] = 0xFF;
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configPcf.password[5] = 0xFF;
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configPcf.password[6] = 0xFF;
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configPcf.init_delay = 17500;
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configPcf.offset[0] = 0;
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configPcf.offset[1] = 0;
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PrintAndLog("Incorrect format");
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PrintAndLog("Examples of right usage : lf pcf7931 config 11 22 33 44 55 66 77 20000");
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PrintAndLog(" lf pcf7931 config FF FF FF FF FF FF FF 17500 -10 30");
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return 0;
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}
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int CmdLFPCF7931Write(const char *Cmd)
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{
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UsbCommand c = {CMD_PCF7931_WRITE};
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int res = 0;
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res = sscanf(Cmd, "%x %x %x", &c.arg[0], &c.arg[1], &c.arg[2]);
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if(res < 1) {
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PrintAndLog("Please specify the block address in hex");
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return 0;
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}
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if (res == 1){
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PrintAndLog("Please specify the byte address in hex");
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return 0;
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}
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if(res == 2) {
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PrintAndLog("Please specify the data in hex (1 byte)");
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return 0;
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}
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if(res == 3) {
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uint8_t n=0;
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for(n=0;n<7;n++) c.d.asDwords[n] = configPcf.password[n];
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c.d.asDwords[7] = (configPcf.offset[0]+128);
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c.d.asDwords[8] = (configPcf.offset[1]+128);
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c.d.asDwords[9] = configPcf.init_delay;
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SendCommand(&c);
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return 0;
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}
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PrintAndLog("INCORRECT FORMAT");
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return 0;
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}
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static command_t CommandTable[] =
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{
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{"help", CmdHelp, 1, "This help"},
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{"read", CmdLFPCF7931Read, 1, "Read content of a PCF7931 transponder"},
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{"write", CmdLFPCF7931Write, 1, "Write data on a PCF7931 transponder. Usage : lf pcf7931 write <bloc address> <byte address> <data>"},
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{"config", CmdLFPCF7931Config, 1, "Configure the password, the tags initialization delay and time offsets (optional)"},
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{NULL, NULL, 0, NULL}
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};
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int CmdLFPCF7931(const char *Cmd)
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{
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CmdsParse(CommandTable, Cmd);
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return 0;
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}
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int CmdHelp(const char *Cmd)
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{
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CmdsHelp(CommandTable);
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return 0;
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}
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