Hitag fixes (#887)

[proxmark3-svn] / client / cmdlfpcf7931.c

diff --git a/client/cmdlfpcf7931.c b/client/cmdlfpcf7931.c
index b1e1ae9eaa47a788257f2ef6c33d25b35e02cc22..74bc3b3e3d84a02721f63a35115604d2849d440a 100644 (file)
--- a/client/cmdlfpcf7931.c
+++ b/client/cmdlfpcf7931.c
@@ -1,6 +1,7 @@
 //-----------------------------------------------------------------------------
 // Copyright (C) 2012 Chalk <chalk.secu at gmail.com>
 //               2015 Dake <thomas.cayrou at gmail.com>
 //-----------------------------------------------------------------------------
 // Copyright (C) 2012 Chalk <chalk.secu at gmail.com>
 //               2015 Dake <thomas.cayrou at gmail.com>

+//               2018 sguerrini97 <sguerrini97 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
 
 // 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


@@ -9,128 +10,223 @@
 // Low frequency PCF7931 commands
 //-----------------------------------------------------------------------------
 
 // Low frequency PCF7931 commands
 //-----------------------------------------------------------------------------
 

+#include "cmdlfpcf7931.h"
+

 #include <stdio.h>
 #include <string.h>
 #include <stdio.h>
 #include <string.h>

-#include "proxmark3.h"
+#include "comms.h"

 #include "ui.h"
 #include "ui.h"

+#include "util.h"

 #include "graph.h"
 #include "cmdparser.h"
 #include "cmddata.h"
 #include "cmdmain.h"
 #include "cmdlf.h"
 #include "graph.h"
 #include "cmdparser.h"
 #include "cmddata.h"
 #include "cmdmain.h"
 #include "cmdlf.h"

-#include "cmdlfpcf7931.h"

 
 static int CmdHelp(const char *Cmd);
 
 
 static int CmdHelp(const char *Cmd);
 

-struct pcf7931_config configPcf = {{0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF},17500,{0,0}};
+#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 CmdLFPCF7931Read(const char *Cmd)
+int usage_pcf7931_bruteforce()

 {
 {

-  UsbCommand c = {CMD_PCF7931_READ};
-  SendCommand(&c);
-  UsbCommand resp;
-  WaitForResponse(CMD_ACK,&resp);
-  return 0;
+       PrintAndLog("Usage: lf pcf7931 bruteforce [h] <start password> <tries>");
+       PrintAndLog("This command tries to disable PAC of a PCF7931 transponder by bruteforcing the password.");
+       PrintAndLog("!! THIS IS NOT INTENDED TO RECOVER THE FULL PASSWORD !!");
+       PrintAndLog("!! DO NOT USE UNLESS THE FIRST 5 BYTES OF THE PASSWORD ARE KNOWN !!");
+       PrintAndLog("Options:");
+       PrintAndLog("       h                This help");
+       PrintAndLog("       start password   hex password to start from");
+       PrintAndLog("       tries            How many times to send the same data frame");
+       PrintAndLog("Examples:");
+       PrintAndLog("      lf pcf7931 bruteforce 00000000123456 3");
+       return 0;

 }
 
 }
 

-int CmdLFPCF7931Config(const char *Cmd)
-{ 
-  int res = 0;
-  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]);
-
-  if (res >= 7 || res < 1){
-      if(res == 7) configPcf.init_delay = 17500; //default value
-      
-      if(res<=8){
-        configPcf.offset[0] = 0; //default value
-        configPcf.offset[1] = 0; //default value
-      }
-     
-      if(res < 1){
-         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)>");
-         PrintAndLog("The time offsets could be usefull to correct slew rate generated by the antenna.");
-      }
-
-      PrintAndLog("Current configuration :");
-      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]);
-      PrintAndLog("Tag initialization delay : %d us", configPcf.init_delay);
-      PrintAndLog("Offsets : %d us on the low pulses width, %d us on the low pulses positions", configPcf.offset[0], configPcf.offset[1]);
-
-      return 0;
-  }
-
-  //default values
-  configPcf.password[0] = 0xFF;  
-  configPcf.password[1] = 0xFF;  
-  configPcf.password[2] = 0xFF;  
-  configPcf.password[3] = 0xFF;  
-  configPcf.password[4] = 0xFF;  
-  configPcf.password[5] = 0xFF;  
-  configPcf.password[6] = 0xFF;
-
-  configPcf.init_delay = 17500;
-  configPcf.offset[0] = 0; 
-  configPcf.offset[1] = 0; 
-
-  PrintAndLog("Incorrect format");
-  PrintAndLog("Examples of right usage : lf pcf7931 config 11 22 33 44 55 66 77 20000");
-  PrintAndLog("                          lf pcf7931 config FF FF FF FF FF FF FF 17500 -10 30");
-  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();

 
 

-int CmdLFPCF7931Write(const char *Cmd)
-{
-  UsbCommand c = {CMD_PCF7931_WRITE};
-
-  int res = 0;
-  res = sscanf(Cmd, "%x %x %x", &c.arg[0], &c.arg[1], &c.arg[2]);
-
-  if(res < 1) {
-      PrintAndLog("Please specify the block address in hex");
-      return 0;
-  }
-  if (res == 1){ 
-    PrintAndLog("Please specify the byte address in hex");
-     return 0;
-  }
-  if(res == 2) {
-    PrintAndLog("Please specify the data in hex (1 byte)");
-     return 0;
-  }
-  if(res == 3) {
-    uint8_t n=0;
-    for(n=0;n<7;n++)  c.d.asDwords[n] = configPcf.password[n];
-    c.d.asDwords[7] = (configPcf.offset[0]+128);
-    c.d.asDwords[8] = (configPcf.offset[1]+128);
-    c.d.asDwords[9] = configPcf.init_delay;
-    SendCommand(&c);
-    return 0;
-  }
-
-  PrintAndLog("INCORRECT FORMAT");
-  return 0;
+       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;

 }
 
 }
 

+int CmdLFPCF7931BruteForce(const char *Cmd){
+
+       uint8_t ctmp = param_getchar(Cmd, 0);
+       if (strlen(Cmd) < 1 || ctmp == 'h' || ctmp == 'H') return usage_pcf7931_bruteforce();
+
+       uint8_t start_password[7] = {0};
+       uint8_t tries = 3;
+
+       if (param_gethex(Cmd, 0, start_password, 14)) return usage_pcf7931_bruteforce();
+       if (param_getdec(Cmd, 1, &tries)) return usage_pcf7931_bruteforce();
+
+       PrintAndLog("Bruteforcing from password: %02x %02x %02x %02x %02x %02x %02x",
+                       start_password[0],
+                       start_password[1],
+                       start_password[2],
+                       start_password[3],
+                       start_password[4],
+                       start_password[5],
+                       start_password[6]);
+
+       PrintAndLog("Trying each password %d times", tries);
+
+       UsbCommand c = {CMD_PCF7931_BRUTEFORCE, {bytes_to_num(start_password, 7), tries} };
+
+       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[] = 
+static command_t CommandTable[] =

 {
 {

-  {"help", CmdHelp, 1, "This help"},
-  {"read", CmdLFPCF7931Read, 1, "Read content of a PCF7931 transponder"},
-  {"write", CmdLFPCF7931Write, 1, "Write data on a PCF7931 transponder. Usage : lf pcf7931 write <bloc address> <byte address> <data>"},
-   {"config", CmdLFPCF7931Config, 1, "Configure the password, the tags initialization delay and time offsets (optional)"},
-  {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)"},
+       {"bruteforce", CmdLFPCF7931BruteForce, 0, "Bruteforce a PCF7931 transponder password."},
+       {NULL,     NULL,               0, NULL}

 };
 
 int CmdLFPCF7931(const char *Cmd)
 {
 };
 
 int CmdLFPCF7931(const char *Cmd)
 {

-  CmdsParse(CommandTable, Cmd);
-  return 0;
+       CmdsParse(CommandTable, Cmd);
+       return 0;

 }
 
 int CmdHelp(const char *Cmd)
 {
 }
 
 int CmdHelp(const char *Cmd)
 {

-  CmdsHelp(CommandTable);
-  return 0;
+       CmdsHelp(CommandTable);
+       return 0;

 }
 }