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
  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                         free(nonce);
  62                 }
  63                 if (i < n - 1) {
  64                         sleep(d);
  65                 }
  66         }
  67         PrintAndLog("End: %u", time(NULL));
  68         return 1;
  69 }
  70
  71 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  72 ////////////////////////////////The commands lie below here/////////////////////////////////////////////////////////////////////////////////////////
  73
  74 // perform the PACE protocol by replaying APDUs
  75 int CmdHFEPAPACEReplay(const char *Cmd)
  76 {
  77         // the 4 APDUs which are replayed + their lengths
  78         uint8_t msesa_apdu[41], gn_apdu[8], map_apdu[75];
  79         uint8_t pka_apdu[75], ma_apdu[18], apdu_lengths[5] = {0};
  80         // pointers to the arrays to be able to iterate
  81         uint8_t *apdus[] = {msesa_apdu, gn_apdu, map_apdu, pka_apdu, ma_apdu};
  82
  83         // usage message
  84         static const char *usage_msg =
  85                 "Please specify 5 APDUs separated by spaces. "
  86                 "Example:\n preplay 0022C1A4 1068000000 1086000002 1234ABCDEF 1A2B3C4D";
  87
  88         // Proxmark response
  89         UsbCommand resp;
  90
  91         int skip = 0, skip_add = 0, scan_return = 0;
  92         // for each APDU
  93         for (int i = 0; i < sizeof(apdu_lengths); i++) {
  94                 // scan to next space or end of string
  95                 while (Cmd[skip] != ' ' && Cmd[skip] != '\0') {
  96                         // convert
  97                         scan_return = sscanf(Cmd + skip, "%2X%n",
  98                                              (unsigned int *) (apdus[i] + apdu_lengths[i]),
  99                                              &skip_add);
 100                         if (scan_return < 1) {
 101                                 PrintAndLog((char *)usage_msg);
 102                                 PrintAndLog("Not enough APDUs! Try again!");
 103                                 return 0;
 104                         }
 105                         skip += skip_add;
 106             apdu_lengths[i]++;
 107                 }
 108
 109                 // break on EOF
 110                 if (Cmd[skip] == '\0') {
 111                         if (i < sizeof(apdu_lengths) - 1) {
 112
 113                                 PrintAndLog((char *)usage_msg);
 114                                 return 0;
 115                         }
 116                         break;
 117                 }
 118                 // skip the space
 119                 skip++;
 120         }
 121
 122         // transfer the APDUs to the Proxmark
 123         UsbCommand usb_cmd;
 124         usb_cmd.cmd = CMD_EPA_PACE_REPLAY;
 125         for (int i = 0; i < sizeof(apdu_lengths); i++) {
 126                 // APDU number
 127                 usb_cmd.arg[0] = i + 1;
 128                 // transfer the APDU in several parts if necessary
 129                 for (int j = 0; j * sizeof(usb_cmd.d.asBytes) < apdu_lengths[i]; j++) {
 130                         // offset into the APDU
 131                         usb_cmd.arg[1] = j * sizeof(usb_cmd.d.asBytes);
 132                         // amount of data in this packet
 133                         int packet_length = apdu_lengths[i] - (j * sizeof(usb_cmd.d.asBytes));
 134                         if (packet_length > sizeof(usb_cmd.d.asBytes)) {
 135                                 packet_length = sizeof(usb_cmd.d.asBytes);
 136                         }
 137                         usb_cmd.arg[2] = packet_length;
 138
 139                         memcpy(usb_cmd.d.asBytes, // + (j * sizeof(usb_cmd.d.asBytes)),
 140                                apdus[i] + (j * sizeof(usb_cmd.d.asBytes)),
 141                                packet_length);
 142                         SendCommand(&usb_cmd);
 143                         WaitForResponse(CMD_ACK, &resp);
 144                         if (resp.arg[0] != 0) {
 145                                 PrintAndLog("Transfer of APDU #%d Part %d failed!", i, j);
 146                                 return 0;
 147                         }
 148                 }
 149         }
 150
 151         // now perform the replay
 152         usb_cmd.arg[0] = 0;
 153         SendCommand(&usb_cmd);
 154         WaitForResponse(CMD_ACK, &resp);
 155         if (resp.arg[0] != 0) {
 156                 PrintAndLog("\nPACE replay failed in step %u!", (uint32_t)resp.arg[0]);
 157                 PrintAndLog("Measured times:");
 158                 PrintAndLog("MSE Set AT: %u us", resp.d.asDwords[0]);
 159                 PrintAndLog("GA Get Nonce: %u us", resp.d.asDwords[1]);
 160                 PrintAndLog("GA Map Nonce: %u us", resp.d.asDwords[2]);
 161                 PrintAndLog("GA Perform Key Agreement: %u us", resp.d.asDwords[3]);
 162                 PrintAndLog("GA Mutual Authenticate: %u us", resp.d.asDwords[4]);
 163         } else {
 164                 PrintAndLog("PACE replay successfull!");
 165                 PrintAndLog("MSE Set AT: %u us", resp.d.asDwords[0]);
 166                 PrintAndLog("GA Get Nonce: %u us", resp.d.asDwords[1]);
 167                 PrintAndLog("GA Map Nonce: %u us", resp.d.asDwords[2]);
 168                 PrintAndLog("GA Perform Key Agreement: %u us", resp.d.asDwords[3]);
 169                 PrintAndLog("GA Mutual Authenticate: %u us", resp.d.asDwords[4]);
 170         }
 171
 172
 173         return 1;
 174 }
 175
 176 ////////////////////////////////The new commands lie above here/////////////////////////////////////////////////////////////////////////////////////
 177 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 178
 179 // UI-related stuff
 180
 181 static const command_t CommandTable[] = {
 182   {"help",    CmdHelp,                   1, "This help"},
 183   {"cnonces", CmdHFEPACollectPACENonces, 0,
 184               "<m> <n> <d> Acquire n>0 encrypted PACE nonces of size m>0 with d sec pauses"},
 185   {"preplay", CmdHFEPAPACEReplay,        0,
 186    "<mse> <get> <map> <pka> <ma> Perform PACE protocol by replaying given APDUs"},
 187   {NULL, NULL, 0, NULL}
 188 };
 189
 190 int CmdHelp(const char *Cmd) {
 191   CmdsHelp(CommandTable);
 192   return 0;
 193 }
 194
 195 int CmdHFEPA(const char *Cmd) {
 196         // flush
 197         clearCommandBuffer();
 198         //WaitForResponseTimeout(CMD_ACK,NULL,100);
 199         // parse
 200         CmdsParse(CommandTable, Cmd);
 201         return 0;
 202 }