X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/f5fca2ed62fa1948cf1cc4eabaa6dc4cc27762cd..refs/pull/538/head:/client/cmdlfpcf7931.c

diff --git a/client/cmdlfpcf7931.c b/client/cmdlfpcf7931.c
index c31a9f9c..ffaf946f 100644
--- a/client/cmdlfpcf7931.c
+++ b/client/cmdlfpcf7931.c
@@ -1,17 +1,18 @@
 //-----------------------------------------------------------------------------
 // Copyright (C) 2012 Chalk <chalk.secu at gmail.com>
-//
+//               2015 Dake <thomas.cayrou at gmail.com>
+
 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
 // at your option, any later version. See the LICENSE.txt file for the text of
 // the license.
 //-----------------------------------------------------------------------------
 // Low frequency PCF7931 commands
 //-----------------------------------------------------------------------------
-
 #include <stdio.h>
 #include <string.h>
-#include "proxusb.h"
+#include "proxmark3.h"
 #include "ui.h"
+#include "util.h"
 #include "graph.h"
 #include "cmdparser.h"
 #include "cmddata.h"
@@ -21,29 +22,158 @@
 
 static int CmdHelp(const char *Cmd);
 
-int CmdLFPCF7931Read(const char *Cmd)
-{
-  UsbCommand c = {CMD_PCF7931_READ};
-  SendCommand(&c);
-  WaitForResponse(CMD_ACK);
-  return 0;
+#define PCF7931_DEFAULT_INITDELAY 17500
+#define PCF7931_DEFAULT_OFFSET_WIDTH 0
+#define PCF7931_DEFAULT_OFFSET_POSITION 0
+
+// Default values - Configuration
+struct pcf7931_config configPcf = {
+	{0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF},
+	PCF7931_DEFAULT_INITDELAY,
+	PCF7931_DEFAULT_OFFSET_WIDTH, 
+	PCF7931_DEFAULT_OFFSET_POSITION
+	};
+
+// Resets the configuration settings to default values.
+int pcf7931_resetConfig(){
+	memset(configPcf.Pwd, 0xFF, sizeof(configPcf.Pwd) );
+	configPcf.InitDelay = PCF7931_DEFAULT_INITDELAY;
+	configPcf.OffsetWidth = PCF7931_DEFAULT_OFFSET_WIDTH; 
+	configPcf.OffsetPosition = PCF7931_DEFAULT_OFFSET_POSITION; 
+	return 0;
+}
+
+int pcf7931_printConfig(){
+	PrintAndLog("Password (LSB first on bytes) : %s", sprint_hex( configPcf.Pwd, sizeof(configPcf.Pwd)));
+	PrintAndLog("Tag initialization delay      : %d us", configPcf.InitDelay);
+	PrintAndLog("Offset low pulses width       : %d us", configPcf.OffsetWidth);
+	PrintAndLog("Offset low pulses position    : %d us", configPcf.OffsetPosition);
+	return 0;
+}
+
+int usage_pcf7931_read(){
+	PrintAndLog("Usage: lf pcf7931 read [h] ");
+	PrintAndLog("This command tries to read a PCF7931 tag.");
+	PrintAndLog("Options:");
+	PrintAndLog("       h   This help");
+	PrintAndLog("Examples:");
+	PrintAndLog("      lf pcf7931 read");
+	return 0;
+}
+
+int usage_pcf7931_write(){
+	PrintAndLog("Usage: lf pcf7931 write [h] <block address> <byte address> <data>");
+	PrintAndLog("This command tries to write a PCF7931 tag.");
+	PrintAndLog("Options:");
+	PrintAndLog("       h          This help");
+	PrintAndLog("       blockaddress   Block to save [0-7]");
+	PrintAndLog("       byteaddress    Index of byte inside block to write [0-15]");
+	PrintAndLog("       data           one byte of data (hex)");
+	PrintAndLog("Examples:");
+	PrintAndLog("      lf pcf7931 write 2 1 FF");
+	return 0;
+}
+
+int usage_pcf7931_config(){
+	PrintAndLog("Usage: lf pcf7931 config [h] [r] <pwd> <delay> <offset width> <offset position>");
+	PrintAndLog("This command tries to set the configuration used with PCF7931 commands");
+	PrintAndLog("The time offsets could be useful to correct slew rate generated by the antenna");
+	PrintAndLog("Caling without some parameter will print the current configuration.");
+	PrintAndLog("Options:");
+	PrintAndLog("       h       This help");
+	PrintAndLog("       r       Reset configuration to default values");
+	PrintAndLog("       pwd     Password, hex, 7bytes, LSB-order");
+	PrintAndLog("       delay   Tag initialization delay (in us) decimal");
+	PrintAndLog("       offset  Low pulses width (in us) decimal");
+	PrintAndLog("       offset  Low pulses position (in us) decimal");  
+	PrintAndLog("Examples:");
+	PrintAndLog("      lf pcf7931 config");
+	PrintAndLog("      lf pcf7931 config r");
+	PrintAndLog("      lf pcf7931 config 11223344556677 20000");
+	PrintAndLog("      lf pcf7931 config 11223344556677 17500 -10 30");
+	return 0;
+}
+
+int CmdLFPCF7931Read(const char *Cmd){  
+
+	uint8_t ctmp = param_getchar(Cmd, 0);
+	if ( ctmp == 'H' || ctmp == 'h' ) return usage_pcf7931_read();
+
+	UsbCommand resp;
+	UsbCommand c = {CMD_PCF7931_READ, {0, 0, 0}};
+	clearCommandBuffer();
+	SendCommand(&c);
+	if ( !WaitForResponseTimeout(CMD_ACK, &resp, 2500) ) {
+		PrintAndLog("command execution time out");
+		return 1;
+	}
+	return 0;
+}
+
+int CmdLFPCF7931Config(const char *Cmd){ 
+
+	uint8_t ctmp = param_getchar(Cmd, 0);
+	if ( ctmp == 0) return pcf7931_printConfig();
+	if ( ctmp == 'H' || ctmp == 'h' ) return usage_pcf7931_config();
+	if ( ctmp == 'R' || ctmp == 'r' ) return pcf7931_resetConfig(); 
+
+	if ( param_gethex(Cmd, 0, configPcf.Pwd, 14) ) return usage_pcf7931_config();
+
+	configPcf.InitDelay = (param_get32ex(Cmd,1,0,10) & 0xFFFF);
+	configPcf.OffsetWidth = (int)(param_get32ex(Cmd,2,0,10) & 0xFFFF);
+	configPcf.OffsetPosition = (int)(param_get32ex(Cmd,3,0,10) & 0xFFFF);
+
+	pcf7931_printConfig();
+	return 0;
+}
+
+int CmdLFPCF7931Write(const char *Cmd){
+
+	uint8_t ctmp = param_getchar(Cmd, 0);
+	if (strlen(Cmd) < 1 || ctmp == 'h' || ctmp == 'H') return usage_pcf7931_write();  
+
+	uint8_t block = 0, bytepos = 0, data = 0;
+	
+	if ( param_getdec(Cmd, 0, &block) ) return usage_pcf7931_write();
+	if ( param_getdec(Cmd, 1, &bytepos) ) return usage_pcf7931_write();
+	
+	if ( (block > 7) || (bytepos > 15) ) return usage_pcf7931_write();
+
+	data  = param_get8ex(Cmd, 2, 0, 16);
+	
+	PrintAndLog("Writing block: %d", block);
+	PrintAndLog("          pos: %d", bytepos);
+	PrintAndLog("         data: 0x%02X", data);
+
+	UsbCommand c = {CMD_PCF7931_WRITE, { block, bytepos, data} };
+	memcpy(c.d.asDwords, configPcf.Pwd, sizeof(configPcf.Pwd) );
+	  c.d.asDwords[7] = (configPcf.OffsetWidth + 128);
+	  c.d.asDwords[8] = (configPcf.OffsetPosition + 128);
+	  c.d.asDwords[9] = configPcf.InitDelay;
+
+	clearCommandBuffer();
+	SendCommand(&c);
+	//no ack?
+	return 0;
 }
 
 static command_t CommandTable[] = 
 {
-  {"help", CmdHelp, 1, "This help"},
-  {"read", CmdLFPCF7931Read, 1, "Read content of a PCF7931 transponder"},
-  {NULL, NULL, 0, NULL}
+	{"help",   CmdHelp,            1, "This help"},
+	{"read",   CmdLFPCF7931Read,   0, "Read content of a PCF7931 transponder"},
+	{"write",  CmdLFPCF7931Write,  0, "Write data on a PCF7931 transponder."},
+	{"config", CmdLFPCF7931Config, 1, "Configure the password, the tags initialization delay and time offsets (optional)"},
+	{NULL,     NULL,               0, NULL}
 };
 
 int CmdLFPCF7931(const char *Cmd)
 {
-  CmdsParse(CommandTable, Cmd);
-  return 0;
+	CmdsParse(CommandTable, Cmd);
+	return 0;
 }
 
 int CmdHelp(const char *Cmd)
 {
-  CmdsHelp(CommandTable);
-  return 0;
+	CmdsHelp(CommandTable);
+	return 0;
 }