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 #include "sleep.h"
  18
  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         uint8_t 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, "%hhu %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 = WaitForResponse(CMD_ACK);
  47
  48                 // check if command failed
  49                 if (resp->arg[0] != 0) {
  50                         PrintAndLog("Error in step %d, Return code: %d",
  51                                     resp->arg[0],
  52                                                 (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                                 snprintf(nonce + (2 * j), 3, "%02X", resp->d.asBytes[j]);
  58                         }
  59                         // print nonce
  60                         PrintAndLog("Length: %d, Nonce: %s",
  61                                     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, 500) != NULL) ;
  92
  93         // parse
  94   CmdsParse(CommandTable, Cmd);
  95   return 0;
  96 }