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 #include "cmdhfepa.h"
  20
  21 static int CmdHelp(const char *Cmd);
  22
  23 // Perform (part of) the PACE protocol
  24 int CmdHFEPACollectPACENonces(const char *Cmd)
  25 {
  26         // requested nonce size
  27         unsigned int m = 0;
  28         // requested number of Nonces
  29         unsigned int n = 0;
  30         // delay between requests
  31         unsigned int d = 0;
  32
  33         sscanf(Cmd, "%u %u %u", &m, &n, &d);
  34
  35         // values are expected to be > 0
  36         m = m > 0 ? m : 1;
  37         n = n > 0 ? n : 1;
  38
  39         PrintAndLog("Collecting %u %"hhu"-byte nonces", n, m);
  40         PrintAndLog("Start: %u", time(NULL));
  41         // repeat n times
  42         for (unsigned int i = 0; i < n; i++) {
  43                 // execute PACE
  44                 UsbCommand c = {CMD_EPA_PACE_COLLECT_NONCE, {(int)m, 0, 0}};
  45                 SendCommand(&c);
  46                 UsbCommand resp;
  47
  48                 WaitForResponse(CMD_ACK,&resp);
  49
  50                 // check if command failed
  51                 if (resp.arg[0] != 0) {
  52                         PrintAndLog("Error in step %d, Return code: %d",resp.arg[0],(int)resp.arg[1]);
  53                 } else {
  54                         size_t nonce_length = resp.arg[1];
  55                         char *nonce = (char *) malloc(2 * nonce_length + 1);
  56                         for(int j = 0; j < nonce_length; j++) {
  57                                 sprintf(nonce + (2 * j), "%02X", resp.d.asBytes[j]);
  58                         }
  59                         // print nonce
  60                         PrintAndLog("Length: %d, Nonce: %s", nonce_length, nonce);
  61                 }
  62                 if (i < n - 1) {
  63                         sleep(d);
  64                 }
  65         }
  66         PrintAndLog("End: %u", time(NULL));
  67
  68         return 1;
  69 }
  70
  71 // UI-related stuff
  72
  73 static const command_t CommandTable[] =
  74 {
  75   {"help",    CmdHelp,                   1, "This help"},
  76   {"cnonces", CmdHFEPACollectPACENonces, 0,
  77               "<m> <n> <d> Acquire n>0 encrypted PACE nonces of size m>0 with d sec pauses"},
  78   {NULL, NULL, 0, NULL}
  79 };
  80
  81 int CmdHelp(const char *Cmd)
  82 {
  83   CmdsHelp(CommandTable);
  84   return 0;
  85 }
  86
  87 int CmdHFEPA(const char *Cmd)
  88 {
  89         // flush
  90         WaitForResponseTimeout(CMD_ACK,NULL,100);
  91
  92         // parse
  93   CmdsParse(CommandTable, Cmd);
  94   return 0;
  95 }