FIX: Coverity, Dereference null return, CID #212329, filehandle could be NULL

[proxmark3-svn] / client / cmdlfhid.c

diff --git a/client/cmdlfhid.c b/client/cmdlfhid.c
index 344662e1dd23f61609f09676c8b12e7aa675e26e..b9d4b75e9067b78fa4af8f08a5985ac8de6c389a 100644 (file)
--- a/client/cmdlfhid.c
+++ b/client/cmdlfhid.c
@@ -9,14 +9,32 @@
 //-----------------------------------------------------------------------------
 
 #include <stdio.h>
 //-----------------------------------------------------------------------------
 
 #include <stdio.h>

-#include "proxusb.h"
+#include <string.h>
+#include "proxmark3.h"

 #include "ui.h"
 #include "graph.h"
 #include "cmdparser.h"
 #include "cmdlfhid.h"
 #include "ui.h"
 #include "graph.h"
 #include "cmdparser.h"
 #include "cmdlfhid.h"

+#include "util.h"
+#include "cmdmain.h"

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

+int usage_hid_wiegand(){
+       PrintAndLog("Usage: lf hid wiegand [h] [formatlenght] [oem] [FacilityCode] [cardnumber]");
+       PrintAndLog("This command converts FC/Cardnum to wiegand code");
+       PrintAndLog("Options:");
+       PrintAndLog("       h                   - This help");
+       PrintAndLog("       formatlen   - Format length,  26|34|35|37|44|84");
+       PrintAndLog("       oem                 - Oem number");
+       PrintAndLog("       facilitynum - Facility number");
+       PrintAndLog("       cardnum             - Card number");
+       PrintAndLog("Examples:");
+       PrintAndLog("      lf hid wiegand 26 0 101 2001");
+       return 0;
+}
+
+/*

 int CmdHIDDemod(const char *Cmd)
 {
   if (GraphTraceLen < 4800) {
 int CmdHIDDemod(const char *Cmd)
 {
   if (GraphTraceLen < 4800) {


@@ -35,48 +53,262 @@ int CmdHIDDemod(const char *Cmd)
   RepaintGraphWindow();
   return 0;
 }
   RepaintGraphWindow();
   return 0;
 }

-
+*/

 int CmdHIDDemodFSK(const char *Cmd)
 {
 int CmdHIDDemodFSK(const char *Cmd)
 {

-  UsbCommand c={CMD_HID_DEMOD_FSK};
-  SendCommand(&c);
-  return 0;
+       int findone = ( Cmd[0] == '1' ) ? 1 : 0;
+       UsbCommand c = {CMD_HID_DEMOD_FSK, {findone, 0 , 0}};
+       clearCommandBuffer();
+       SendCommand(&c);
+       return 0;

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

-  unsigned int hi = 0, lo = 0;
-  int n = 0, i = 0;
+       unsigned int hi = 0, lo = 0;
+       int n = 0, i = 0;

 
 

-  while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
-    hi = (hi << 4) | (lo >> 28);
-    lo = (lo << 4) | (n & 0xf);
-  }
+       while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
+               hi = (hi << 4) | (lo >> 28);
+               lo = (lo << 4) | (n & 0xf);
+       }

 
 

-  PrintAndLog("Emulating tag with ID %x%16x", hi, lo);
+       PrintAndLog("Emulating tag with ID %x%16x", hi, lo);
+       PrintAndLog("Press pm3-button to abort simulation");

 
 

-  UsbCommand c = {CMD_HID_SIM_TAG, {hi, lo, 0}};
-  SendCommand(&c);
-  return 0;
+       UsbCommand c = {CMD_HID_SIM_TAG, {hi, lo, 0}};
+       clearCommandBuffer();
+       SendCommand(&c);
+       return 0;

 }
 
 }
 

-static command_t CommandTable[] = 
+int CmdHIDClone(const char *Cmd)

 {
 {

-  {"help",      CmdHelp,        1, "This help"},
-  {"demod",     CmdHIDDemod,    1, "Demodulate HID Prox Card II (not optimal)"},
-  {"fskdemod",  CmdHIDDemodFSK, 0, "Realtime HID FSK demodulator"},
-  {"sim",       CmdHIDSim,      0, "<ID> -- HID tag simulator"},
-  {NULL, NULL, 0, NULL}
-};
+       unsigned int hi2 = 0, hi = 0, lo = 0;
+       int n = 0, i = 0;
+       UsbCommand c;

 
 

-int CmdLFHID(const char *Cmd)
-{
-  CmdsParse(CommandTable, Cmd);
-  return 0;
+       if (strchr(Cmd,'l') != 0) {
+               while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
+                       hi2 = (hi2 << 4) | (hi >> 28);
+                       hi = (hi << 4) | (lo >> 28);
+                       lo = (lo << 4) | (n & 0xf);
+               }
+
+               PrintAndLog("Cloning tag with long ID %x%08x%08x", hi2, hi, lo);
+
+               c.d.asBytes[0] = 1;
+       } else {
+               while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
+                       hi = (hi << 4) | (lo >> 28);
+                       lo = (lo << 4) | (n & 0xf);
+               }
+
+               PrintAndLog("Cloning tag with ID %x%08x", hi, lo);
+
+               hi2 = 0;
+               c.d.asBytes[0] = 0;
+       }
+
+       c.cmd = CMD_HID_CLONE_TAG;
+       c.arg[0] = hi2;
+       c.arg[1] = hi;
+       c.arg[2] = lo;
+
+       clearCommandBuffer();
+       SendCommand(&c);
+       return 0;
+}
+
+static void getParity26(uint32_t *hi, uint32_t *lo){
+       uint32_t result = 0;
+       int i;
+       // even parity
+       for (i = 24;i >= 13;i--)
+               result ^= (*lo >> i) & 1;
+       // even parity 26th bit
+       *lo |= result << 25;
+
+       // odd parity 
+       result = 0;
+       for (i = 12;i >= 1;i--)
+               result ^= (*lo >> i) & 1;
+       *lo |= !result;
+}
+static void getParity34(uint32_t *hi, uint32_t *lo){
+       uint32_t result = 0;
+       int i;
+
+       // even parity 
+       for (i = 7;i >= 0;i--)
+               result ^= (*hi >> i) & i;
+       for (i = 31;i >= 24;i--)
+               result ^= (*lo >> i) & 1;
+
+       *hi |= result << 2; 
+
+       // odd parity bit
+       result = 0;
+       for (i = 23;i >= 1;i--)
+               result ^= (*lo >> i) & 1;
+
+       *lo |= !result;
+}
+static void getParity35(uint32_t *hi, uint32_t *lo){
+       *hi = *hi;

 }
 }

+static void getParity37S(uint32_t *hi,uint32_t *lo){
+       uint32_t result = 0;
+       uint8_t i;
+
+       // even parity
+       for (i = 4; i >= 0; i--)
+               result ^= (*hi >> i) & 1;
+       
+       for (i = 31; i >= 20; i--)
+               result ^= (*lo >> i) & 1;

 
 

-int CmdHelp(const char *Cmd)
+       *hi |= result;
+
+       // odd parity
+       result = 0;
+       for (i = 19; i >= 1; i--)
+               result ^= (*lo >> i) & 1;
+
+       *lo |= result;
+}
+static void getParity37H(uint32_t *hi, uint32_t *lo){
+       uint32_t result = 0;
+       int i;
+
+       // even parity
+       for (i = 4;i >= 0;i--)
+               result ^= (*hi >> i) & 1;
+       for (i = 31;i >= 20;i--)
+               result ^= (*lo >> i) & 1;
+       *hi |= result << 4;
+
+       // odd parity
+       result = 0;
+       for (i = 19;i >= 1;i--)
+               result ^= (*lo >> i) & 1;
+       *lo |= result;
+}
+
+static void calc26(uint16_t fc, uint32_t cardno, uint32_t *hi, uint32_t *lo){
+   *lo = ((cardno & 0xFFFF) << 1) | ((fc & 0xFF) << 17) | (1 << 26);
+   *hi = (1 << 5);
+}
+static void calc34(uint16_t fc, uint32_t cardno, uint32_t *hi, uint32_t *lo){
+  // put card number first bit 1 .. 20 //
+  *lo = ((cardno & 0X000F7FFF) << 1) | ((fc & 0XFFFF) << 17);
+  // set bit format for less than 37 bit format
+  *hi = (1 << 5) | (fc >> 15);
+}
+static void calc35(uint16_t fc, uint32_t cardno, uint32_t *hi, uint32_t *lo){
+       *lo = ((cardno & 0xFFFFF) << 1) | fc << 21; 
+       *hi = (1 << 5) | ((fc >> 11) & 1);  
+}
+static void calc37S(uint16_t sc, uint32_t cn, uint32_t *hi, uint32_t *lo){
+       // SC 2 - 17   - 16 bit  
+       // CN 18 - 36  - 19 bit
+       // Even P1   1 - 19
+       // Odd  P37  19 - 36
+
+       sc = sc & 0xFFFF;
+       *lo = ( (sc << 20) | (cn & 0x7FFFF) << 1);
+       *hi = (sc >> 12);
+}
+static void calc37H(uint64_t cn, uint32_t *hi, uint32_t *lo){
+       // SC NONE
+       // CN 1-35 34 bits 
+       // Even Parity  0th bit  1-18
+       // Odd  Parity 36th bit 19-35
+       cn = (cn & 0x00000003FFFFFFFF);
+       *lo = (cn << 1);
+       *hi = (cn >> 31);
+}
+static void calc40(uint64_t cn, uint32_t *hi, uint32_t *lo){
+       cn = (cn & 0xFFFFFFFFFF);
+       *lo = ((cn & 0xFFFFFFFF) << 1 ); 
+       *hi = (cn >> 31);  
+}
+
+int CmdHIDWiegand(const char *Cmd)

 {
 {

-  CmdsHelp(CommandTable);
-  return 0;
+       uint32_t oem;
+       uint32_t fmtlen = 0;
+       uint32_t fc, lo = 0, hi = 0;
+       uint64_t cn = 0;
+       uint32_t cardnum = 0;
+       
+       //uint32_t temp, p
+       uint8_t ctmp = param_getchar(Cmd, 0);
+       if ( strlen(Cmd) < 0 || strlen(Cmd) < 4 || ctmp == 'H' || ctmp == 'h' ) return usage_hid_wiegand();
+
+       fmtlen = param_get8(Cmd, 0);    
+       oem = param_get8(Cmd, 1);
+       fc = param_get32ex(Cmd, 2, 0, 10);
+       cn = param_get64ex(Cmd, 3, 0, 10);
+
+       switch ( fmtlen ) {
+               case 26 : {
+                       cardnum = (cn & 0xFFFFFFFF);
+                       calc26(fc, cardnum, &hi, &lo);
+                       getParity26(&hi, &lo);          
+                       break;
+               }
+               case 34 : {
+                       cardnum = (cn & 0xFFFFFFFF);
+                       calc34(fc, cardnum, &hi, &lo);
+                       getParity34(&hi, &lo);          
+                       break;
+               }
+               case 35 : {
+                       cardnum = (cn & 0xFFFFFFFF);
+                       calc35(fc, cardnum, &hi, &lo);
+                       getParity35(&hi, &lo);
+                       break;
+               }
+               case 37 : {
+                       cardnum = (cn & 0xFFFFFFFF);
+                       calc37S(fc, cardnum, &hi, &lo);
+                       getParity37S(&hi, &lo);
+                       break;
+               }
+               case 38 : { 
+                       cardnum = (cn & 0xFFFFFFFF);
+                       calc37H(cardnum, &hi, &lo);
+                       getParity37H(&hi, &lo);
+                       break;
+               }
+               case 40 : {
+                       calc40(cn, &hi, &lo);
+                       break;
+               }
+               case 44 : { break; }
+               case 84 : { break; }
+       }
+       PrintAndLog("HID %d bit | FC: %d CN: %lld | Wiegand Code: %08X%08X", fmtlen, fc, cn, hi, lo);
+       return 0;
+}
+
+static command_t CommandTable[] = {
+       {"help",      CmdHelp,        1, "This help"},
+       //{"demod",     CmdHIDDemod,    1, "Demodulate HID Prox Card II (not optimal)"},
+       {"fskdemod",  CmdHIDDemodFSK, 0, "['1'] Realtime HID FSK demodulator (option '1' for one tag only)"},
+       {"sim",       CmdHIDSim,      0, "<ID> -- HID tag simulator"},
+       {"clone",     CmdHIDClone,    0, "<ID> ['l'] -- Clone HID to T55x7 (tag must be in antenna)(option 'l' for 84bit ID)"},
+       {"wiegand",  CmdHIDWiegand,  1, "<oem> <fmtlen> <fc> <cardnum> -- convert facilitycode, cardnumber to Wiegand code"},
+       {NULL, NULL, 0, NULL}
+};
+
+int CmdLFHID(const char *Cmd) {
+       CmdsParse(CommandTable, Cmd);
+       return 0;
+}
+
+int CmdHelp(const char *Cmd) {
+       CmdsHelp(CommandTable);
+       return 0;

 }
 }