git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdhfepa.c

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2012 Frederik Möllers
   3 //
   4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   5 // at your option, any later version. See the LICENSE.txt file for the text of
   6 // the license.
   7 //-----------------------------------------------------------------------------
   8 // Commands related to the German electronic Identification Card
   9 //-----------------------------------------------------------------------------
  10
  11 #include "util.h"
  12 #include "proxusb.h"
  13 #include "proxmark3.h"
  14 #include "ui.h"
  15 #include "cmdparser.h"
  16 #include "common.h"
  17 #include "cmdmain.h"
  18 #include "sleep.h"
  19
  20 #include "cmdhfepa.h"
  21
  22 static int CmdHelp(const char *Cmd);
  23
  24 // Perform (part of) the PACE protocol
  25 int CmdHFEPACollectPACENonces(const char *Cmd)
  26 {
  27         // requested nonce size
  28         uint8_t m = 0;
  29         // requested number of Nonces
  30         unsigned int n = 0;
  31         // delay between requests
  32         unsigned int d = 0;
  33
  34         sscanf(Cmd, "%hhu %u %u", &m, &n, &d);
  35
  36         // values are expected to be > 0
  37         m = m > 0 ? m : 1;
  38         n = n > 0 ? n : 1;
  39
  40         PrintAndLog("Collecting %u %hhu-byte nonces", n, m);
  41         PrintAndLog("Start: %u", time(NULL));
  42         // repeat n times
  43         for (unsigned int i = 0; i < n; i++) {
  44                 // execute PACE
  45                 UsbCommand c = {CMD_EPA_PACE_COLLECT_NONCE, {(int)m, 0, 0}};
  46                 SendCommand(&c);
  47                 UsbCommand resp;
  48
  49     WaitForResponse(CMD_ACK,&resp);
  50
  51                 // check if command failed
  52                 if (resp.arg[0] != 0) {
  53                         PrintAndLog("Error in step %d, Return code: %d",resp.arg[0],(int)resp.arg[1]);
  54                 } else {
  55                         size_t nonce_length = resp.arg[1];
  56                         char *nonce = (char *) malloc(2 * nonce_length + 1);
  57                         for(int j = 0; j < nonce_length; j++) {
  58                                 snprintf(nonce + (2 * j), 3, "%02X", resp.d.asBytes[j]);
  59                         }
  60                         // print nonce
  61                         PrintAndLog("Length: %d, Nonce: %s",resp.arg[1], nonce);
  62                 }
  63                 if (i < n - 1) {
  64                         sleep(d);
  65                 }
  66         }
  67         PrintAndLog("End: %u", time(NULL));
  68
  69         return 1;
  70 }
  71
  72 // UI-related stuff
  73
  74 static const command_t CommandTable[] =
  75 {
  76   {"help",    CmdHelp,                   1, "This help"},
  77   {"cnonces", CmdHFEPACollectPACENonces, 0,
  78               "<m> <n> <d> Acquire n>0 encrypted PACE nonces of size m>0 with d sec pauses"},
  79   {NULL, NULL, 0, NULL}
  80 };
  81
  82 int CmdHelp(const char *Cmd)
  83 {
  84   CmdsHelp(CommandTable);
  85   return 0;
  86 }
  87
  88 int CmdHFEPA(const char *Cmd)
  89 {
  90         // flush
  91         while (!WaitForResponseTimeout(CMD_ACK,NULL,500));
  92
  93         // parse
  94   CmdsParse(CommandTable, Cmd);
  95   return 0;
  96 }