MAJOR update, added hitag2 reader, emulation and eavesdropping, lots of new code...

[proxmark3-svn] / client / cmdlfhitag.c

diff --git a/client/cmdlfhitag.c b/client/cmdlfhitag.c
new file mode 100644 (file)
index 0000000..703767b
--- /dev/null
+++ b/client/cmdlfhitag.c
@@ -0,0 +1,203 @@
+//-----------------------------------------------------------------------------
+// Copyright (C) 2012 Roel Verdult
+//
+// 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 Hitag support
+//-----------------------------------------------------------------------------
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "data.h"
+#include "proxusb.h"
+#include "ui.h"
+#include "cmdparser.h"
+#include "common.h"
+#include "util.h"
+#include "hitag2.h"
+
+static int CmdHelp(const char *Cmd);
+
+int CmdLFHitagList(const char *Cmd)
+{
+  uint8_t got[3000];
+  GetFromBigBuf(got,sizeof(got),0);
+
+  PrintAndLog("recorded activity:");
+  PrintAndLog(" ETU     :rssi: who bytes");
+  PrintAndLog("---------+----+----+-----------");
+
+  int i = 0;
+  int prev = -1;
+
+  for (;;) {
+    if(i >= 1900) {
+      break;
+    }
+
+    bool isResponse;
+    int timestamp = *((uint32_t *)(got+i));
+    if (timestamp & 0x80000000) {
+      timestamp &= 0x7fffffff;
+      isResponse = 1;
+    } else {
+      isResponse = 0;
+    }
+
+    int metric = 0;
+    int parityBits = *((uint32_t *)(got+i+4));
+    // 4 bytes of additional information...
+    // maximum of 32 additional parity bit information
+    //
+    // TODO:
+    // at each quarter bit period we can send power level (16 levels)
+    // or each half bit period in 256 levels.
+
+    int len = got[i+8];
+
+    if (len > 100) {
+      break;
+    }
+    if (i + len >= 1900) {
+      break;
+    }
+
+    uint8_t *frame = (got+i+9);
+
+    // Break and stick with current result if buffer was not completely full
+    if (frame[0] == 0x44 && frame[1] == 0x44 && frame[3] == 0x44) { break; }
+
+    char line[1000] = "";
+    int j;
+    for (j = 0; j < len; j++) {
+      int oddparity = 0x01;
+      int k;
+
+      for (k=0;k<8;k++) {
+        oddparity ^= (((frame[j] & 0xFF) >> k) & 0x01);
+      }
+
+      //if((parityBits >> (len - j - 1)) & 0x01) {
+      if (isResponse && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
+        sprintf(line+(j*4), "%02x!  ", frame[j]);
+      }
+      else {
+        sprintf(line+(j*4), "%02x   ", frame[j]);
+      }
+    }
+
+    char metricString[100];
+    if (isResponse) {
+      sprintf(metricString, "%3d", metric);
+    } else {
+      strcpy(metricString, "   ");
+    }
+
+    PrintAndLog(" +%7d: %s: %s %s",
+      (prev < 0 ? 0 : (timestamp - prev)),
+      metricString,
+      (isResponse ? "TAG" : "   "),
+      line);
+
+    prev = timestamp;
+    i += (len + 9);
+  }
+       return 0;
+}
+
+int CmdLFHitagSnoop(const char *Cmd) {
+  UsbCommand c = {CMD_SNOOP_HITAG};
+  SendCommand(&c);
+  return 0;
+}
+
+int CmdLFHitagSim(const char *Cmd) {
+  UsbCommand c = {CMD_SIMULATE_HITAG};
+       char filename[256];
+       FILE* pf;
+       bool tag_mem_supplied;
+
+       param_getstr(Cmd,0,filename);
+       
+       if (strlen(filename) > 0) {
+               if ((pf = fopen(filename,"rb+")) == NULL) {
+                       PrintAndLog("Error: Could not open file [%s]",filename);
+                       return 1;
+               }
+               tag_mem_supplied = true;
+               fread(c.d.asBytes,48,1,pf);
+               fclose(pf);
+       } else {
+               tag_mem_supplied = false;
+       }
+       
+       // Does the tag comes with memory
+       c.arg[0] = (uint32_t)tag_mem_supplied;
+
+  SendCommand(&c);
+  return 0;
+}
+
+int CmdLFHitagReader(const char *Cmd) {
+//  UsbCommand c = {CMD_READER_HITAG};
+       
+//     param_get32ex(Cmd,1,0,16);
+       UsbCommand c = {CMD_READER_HITAG};//, {param_get32ex(Cmd,0,0,10),param_get32ex(Cmd,1,0,16),param_get32ex(Cmd,2,0,16),param_get32ex(Cmd,3,0,16)}};
+       hitag_data* htd = (hitag_data*)c.d.asBytes;
+       hitag_function htf = param_get32ex(Cmd,0,0,10);
+       
+       switch (htf) {
+               case RHT2F_PASSWORD: {
+                       num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->pwd.password);
+               } break;
+               case RHT2F_AUTHENTICATE: {
+                       num_to_bytes(param_get32ex(Cmd,1,0,16),4,htd->auth.NrAr);
+                       num_to_bytes(param_get32ex(Cmd,2,0,16),4,htd->auth.NrAr+4);
+               } break;
+               case RHT2F_TEST_AUTH_ATTEMPTS: {
+                       // No additional parameters needed
+               } break;
+               default: {
+                       PrintAndLog("Error: unkown reader function %d",htf);
+                       PrintAndLog("Hitag reader functions",htf);
+                       PrintAndLog(" HitagS (0*)",htf);
+                       PrintAndLog(" Hitag1 (1*)",htf);
+                       PrintAndLog(" Hitag2 (2*)",htf);
+                       PrintAndLog("  21 <password> (password mode)",htf);
+                       PrintAndLog("  22 <nr> <ar> (authentication)",htf);
+                       PrintAndLog("  25 (test recorded authentications)",htf);
+                       return 1;
+               } break;
+       }
+
+       // Copy the hitag2 function into the first argument
+       c.arg[0] = htf;
+
+  SendCommand(&c);
+  return 0;
+}
+
+static command_t CommandTableHitag[] = 
+{
+  {"help",    CmdHelp,           1, "This help"},
+  {"list",    CmdLFHitagList,    1, "List Hitag trace history"},
+  {"reader",  CmdLFHitagReader,  1, "Act like a Hitag Reader"},
+  {"sim",     CmdLFHitagSim,     1, "Simulate Hitag transponder"},
+  {"snoop",   CmdLFHitagSnoop,   1, "Eavesdrop Hitag communication"},
+               {NULL, NULL, 0, NULL}
+};
+
+int CmdLFHitag(const char *Cmd)
+{
+  CmdsParse(CommandTableHitag, Cmd);
+  return 0;
+}
+
+int CmdHelp(const char *Cmd)
+{
+  CmdsHelp(CommandTableHitag);
+  return 0;
+}