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 "ui.h"
  14 #include "cmdparser.h"
  15 #include "common.h"
  16 #include "cmdmain.h"
  17
  18 #include "cmdhfepa.h"
  19
  20 static int CmdHelp(const char *Cmd);
  21
  22 // Perform (part of) the PACE protocol
  23 int CmdHFEPACollectPACENonces(const char *Cmd)
  24 {
  25         // requested nonce size
  26         uint8_t m = 0;
  27         // requested number of Nonces
  28         unsigned int n = 0;
  29         // delay between requests
  30         unsigned int d = 0;
  31
  32         sscanf(Cmd, "%hhu %u %u", &m, &n, &d);
  33
  34         // values are expected to be > 0
  35         m = m > 0 ? m : 1;
  36         n = n > 0 ? n : 1;
  37
  38         PrintAndLog("Collecting %u %hhu-byte nonces", n, m);
  39         PrintAndLog("Start: %u", time(NULL));
  40         // repeat n times
  41         for (unsigned int i = 0; i < n; i++) {
  42                 // execute PACE
  43                 UsbCommand c = {CMD_EPA_PACE_COLLECT_NONCE, {(int)m, 0, 0}};
  44                 SendCommand(&c);
  45                 UsbCommand *resp = WaitForResponse(CMD_ACK);
  46
  47                 // check if command failed
  48                 if (resp->arg[0] != 0) {
  49                         PrintAndLog("Error in step %d, Return code: %d",
  50                                     resp->arg[0],
  51                                                 (int)resp->arg[1]);
  52                 } else {
  53                         size_t nonce_length = resp->arg[1];
  54                         char *nonce = (char *) malloc(2 * nonce_length + 1);
  55                         for(int j = 0; j < nonce_length; j++) {
  56                                 snprintf(nonce + (2 * j), 3, "%02X", resp->d.asBytes[j]);
  57                         }
  58                         // print nonce
  59                         PrintAndLog("Length: %d, Nonce: %s",
  60                                     resp->arg[1], 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         while (WaitForResponseTimeout(CMD_ACK, 500) != NULL) ;
  91
  92         // parse
  93   CmdsParse(CommandTable, Cmd);
  94   return 0;
  95 }